Article: 101173 of rec.radio.amateur.boatanchors From: Bob Subject: MILITARY MOUNTS Message-ID: Date: Sun, 01 Jan 2006 08:39:34 -0500 For those of you interested in military equipment, please check out my auction http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=5846630837&rd=1&sspagename=STRK%3AMESE%3AIT&rd=1 Thanks.....Bob Article: 101174 of rec.radio.amateur.boatanchors From: kludge@panix.com (Scott Dorsey) Subject: Re: Shure mike MK0019 Date: 1 Jan 2006 08:45:24 -0500 Message-ID: References: <4778854819iapizloj@ehu.es> In article <4778854819iapizloj@ehu.es>, Jon Iza wrote: >I got one mike with such model number which has a transistor=20 >preamplifier. (It is marked Harris) >Does anyone have a copy of the specs and connections???? Shure is _really_ good about docs on this stuff. Look on shure.com under "discontinued products." If it's not there, send them an e-mail and they will usually put it up within a week or two. If only EV were still half as good... --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." Article: 101175 of rec.radio.amateur.boatanchors From: novatech@eskimo.com (Steven Swift) Subject: Re: Yellow filters for P7 phosphor CRT. Date: 26 Dec 2005 01:15:27 GMT Message-ID: References: "COLIN LAMB" writes: >I used that on my old Tek scope. It works great. Poor man's storage scope. >73, Colin K7FM I use P7 to get a quick at peak-peak noise. The decay time is just about right. I got an email pointer to Edmund Opitical (use to be Edmund Scientific). They also have filters. Thanks, Steve. -- Steven D. Swift, novatech@eskimo.com, http://www.novatech-instr.com NOVATECH INSTRUMENTS, INC. P.O. Box 55997 206.301.8986, fax 206.363.4367 Seattle, Washington 98155 USA Article: 101176 of rec.radio.amateur.boatanchors From: "n9zle" Subject: No link attitude! Message-ID: Date: Mon, 26 Dec 2005 04:22:39 GMT No link attitude! http://www.n9zle.com/forum/ What is it with this no-link to other site attitude? Years ago when the internet was in its infancy just about any site would add your site as a link from theirs. In return you would do the same. But now it has come to NO-LINKS. Not even in the forums. I have had a website located on tripod for about 9 years over those nine years I had a link to qrz dot com That site received over a million hits. And many users went from that site to qrz and on-to Icomamerica dot com. I have always supported Icom. They have never given a link on their site to mine. I have always supported qrz. But of course he(AA7BQ) never put a link on his site to mine. Well you may say that "I never asked". And that is true. But recently I have noticed he has been deleting my posts. ALL OF THEM. He never contacted me telling me why. AA7BQ just deleted them. I build CIV cables and sell a few of them every week to amateur operators who want them. When I posted one on his site. I found he deleted the post soon after it was placed there. My beliefs are. 1. QRZ AKA AA7BQ no longer has the amateur radio attitude. 2. AA7BQ has gone fully commercial but calls his site "The Ham Radio Super Site" 3. AA7BQ does not have your best interest in mind. I can also prove what I am writing here. For one if he claims he is nothing but a commercial site then why does he ask for donations? If he is not a commercial site than why will he not allow me to post my CIV cables on his site? That takes care of number 2 Now for number 1 and 3. If some one knows the truth about something but keeps it from you he is a liar. No mater how you put it, he is a liar. On the QRZ site Fred is there to help you renew your license. Or so he leads you to believe so. He charges you for it. Mr. Lloyd has never revealed it to any amateurs that you can renew your license or do an address change at the fcc.gov web site for FREE. Yes TOTAL FREE at the FCC web site. The forms at the FCC web site or no harder to fill out than his. His CD. He charges 24.95 plus tax and shipping. On that CD is data he obtained from the FCC and got it for FREE, he sales it to you. Also he has software, created by programmers like MYSELF. And MODS that have been made available from the manufactures and other HAMS like ME! I have been contributing to Amateur Radio community for greater than 10 years, and have received very little for software I created. Never complained when it was copied. I have performed and created several of the MODS for various transceivers. Never asked a penny for it. I never commercialized HAM RADIO. And NEVER took money from some one for something they could get FREE else where. I am sure many of you would like to ask me "what I am going to do about it?" Here is my answer. I have created an open forum on my web site http://www.n9zle.com/forum/ There you can post a link to your own site even if it is a commercial site. You can post any ham radio equipment you have for sell on the site. You can do a callsign lookup at my site from the FCC database, not that stupid qrz thing. I will soon put together an open source database that I will sell for the price of the CD plus the true cost of shipping. About two bucks total. Once you install the database on your system, you will be able to download updates for FREE. I will make drivers available to programmers to access the database in several different languages and operating systems. I will also attempt to make the database available on the internet for FREE to download. I only ask for a little help from other HAMS like myself. I need a few elmers that are willing to moderate some of the forums. It is easy and you will find it fun. If you have any suggestions on new forums or sections please logon to my site and make a post. 73s N9ZLE Article: 101177 of rec.radio.amateur.boatanchors Date: Sun, 01 Jan 2006 15:10:04 -0400 From: Bill Subject: Re: Bosh 636 Automotive Wireless References: <1136137894.229700.186870@g49g2000cwa.googlegroups.com> Message-ID: MarkAren wrote: > Hello All, > > I help out in a radio museum in Christchurch, New Zealand. We have just > acquired a Bosh 636 Automotive Wireless (1938 ?) and I am hoping that > someone in this group can point me at any information about this unit. > Any pointers or help appreciated. > > Any ideas of a more appropriate group about technical stuff for old > car radios ? > > Thanks, > > Mark. > Is this it? http://www.nostalgiaair.org/PagesByModel/346/M0022346.pdf -Bill Article: 101178 of rec.radio.amateur.boatanchors From: "Fred W4JLE" Subject: CU 168/FRR Date: Sun, 1 Jan 2006 14:41:54 -0500 Message-ID: <8b1b$43b830b6$471d2513$2649@ALLTEL.NET> I received this antenna coupler along with a 390 and a 390A. It looks like new and was installed in the rack with the receivers. It can feed 5 receivers from 1 antenna. >From the tag CU 168/FRR Designed by Collins, built by Breithwaite Pilot Marine Corporation. Any idea of current value? Thanks much Article: 101179 of rec.radio.amateur.boatanchors From: novatech@eskimo.com (Steven Swift) Subject: Re: Favorite Tektronix Scope Date: 1 Jan 2006 21:00:17 GMT Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> "Too_Many_Tools" writes: >I need to replace an oscilloscope that has gone to the Great Test Bench >in the sky. >What Tektronix scope do you prefer? >I have always like the 7000 series...would you recommend these or >another series? >Thanks >TMT I use the new Tek DPO scopes for most work, but keep 7904 (500MHz) with high speed plug-ins and samplers for the times I need analog. You can get 7k scopes for almost nothing. The DPOs will cost a bunch. Steve. -- Steven D. Swift, novatech@eskimo.com, http://www.novatech-instr.com NOVATECH INSTRUMENTS, INC. P.O. Box 55997 206.301.8986, fax 206.363.4367 Seattle, Washington 98155 USA Article: 101180 of rec.radio.amateur.boatanchors From: kludge@panix.com (Scott Dorsey) Subject: Re: Favorite Tektronix Scope Date: 1 Jan 2006 16:17:13 -0500 Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> Too_Many_Tools wrote: >I need to replace an oscilloscope that has gone to the Great Test Bench >in the sky. > >What Tektronix scope do you prefer? > >I have always like the 7000 series...would you recommend these or >another series? The 7000 series is hard to beat. It's stable, it's not that hard to work on, and there are plenty of useful plug-ins available at reasonable prices. That said, I still have a 545 on my bench at work. The calibration contract just went over to a new company and the new cal guys aren't really sure what to make of it.... --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." Article: 101181 of rec.radio.amateur.boatanchors Message-ID: <43B847AF.1D169241@hotmail.com> Date: Sun, 01 Jan 2006 21:20:47 +0000 From: Pooh Bear Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> Scott Dorsey wrote: > Too_Many_Tools wrote: > >I need to replace an oscilloscope that has gone to the Great Test Bench > >in the sky. > > > >What Tektronix scope do you prefer? > > > >I have always like the 7000 series...would you recommend these or > >another series? > > The 7000 series is hard to beat. It's stable, it's not that hard to > work on, and there are plenty of useful plug-ins available at reasonable > prices. > > That said, I still have a 545 on my bench at work. The calibration contract > just went over to a new company and the new cal guys aren't really sure what > to make of it.... Goodness. I had to get rid of a couple of 545s years ago ( no room to keep them ). My current scope at home is a 465. Basic but nice. Graham Article: 101182 of rec.radio.amateur.boatanchors From: "al goss" Subject: re: MK-0019 Message-ID: Date: Sun, 01 Jan 2006 21:42:39 GMT ya can't get reply if you cover your e-mail adr... Spam protection or not--- simply use your arrl.net adr, they block spam. tried to assist but---- sk k2erg@arrl.net one'o the Harris Corp gang. retired ! Article: 101183 of rec.radio.amateur.boatanchors From: Ignoramus32654 Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> Message-ID: Date: Sun, 01 Jan 2006 22:04:57 GMT I am very happy wuth my 2445A. I still have the 475, which is like a Kalashnikov of oscilloscopes -- very simple and sturdy and has high voltage ability. I will sell the 475 though, two scopes is too much. i On 1 Jan 2006 12:49:22 -0800, Too_Many_Tools wrote: > I need to replace an oscilloscope that has gone to the Great Test Bench > in the sky. > > What Tektronix scope do you prefer? > > I have always like the 7000 series...would you recommend these or > another series? > > Thanks > > TMT > -- Article: 101184 of rec.radio.amateur.boatanchors From: "James F. Mayer" References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> Subject: Re: Favorite Tektronix Scope Message-ID: Date: Sun, 01 Jan 2006 22:58:33 GMT "Too_Many_Tools" wrote in message news:1136148561.946351.257400@g44g2000cwa.googlegroups.com... >I need to replace an oscilloscope that has gone to the Great Test Bench > in the sky. > > What Tektronix scope do you prefer? > > I have always like the 7000 series...would you recommend these or > another series? > > Thanks > > TMT > I like the TEK2465, Personally I don't think that it can be beat for an analog scope. Article: 101185 of rec.radio.amateur.boatanchors From: Dino Papas Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> Message-ID: Date: Sun, 01 Jan 2006 18:05:21 -0500 I finally sold off my great Tek 475 and picked up a Tek 2440 -- nice to be able to "save" the display and then be able to make measurements on the signal at your leisure. Especially nice when looking at the slew rate of the slower op-amps. Dino KL0S/4 In article , "James F. Mayer" wrote: > "Too_Many_Tools" wrote in message > news:1136148561.946351.257400@g44g2000cwa.googlegroups.com... > >I need to replace an oscilloscope that has gone to the Great Test Bench > > in the sky. > > > > What Tektronix scope do you prefer? > > > > I have always like the 7000 series...would you recommend these or > > another series? > > > > Thanks > > > > TMT > > > I like the TEK2465, Personally I don't think that it can be beat for > an analog scope. Article: 101186 of rec.radio.amateur.boatanchors From: Ken Scharf Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> Message-ID: <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> Date: Sun, 01 Jan 2006 18:10:16 -0500 Too_Many_Tools wrote: > I need to replace an oscilloscope that has gone to the Great Test Bench > in the sky. > > What Tektronix scope do you prefer? > > I have always like the 7000 series...would you recommend these or > another series? > > Thanks > > TMT > Do you prefer Analog or Digital? Do you have room for an old tube mainframe scope, or prefer a "portable"? I have a Tek 454 that I got at a company auction years back where I used to work (paid $150 for it). The 453,453A,454, 454A series are easy to work on, and parts are available from many sources (the nuvistor tubes in the front end and the tunnel diodes in the sweep circuits can be a bit hard to find, but are available). The 485 is a look a like that is all solid state with higher BW but many do not consider it as good a scope design. I would not turn one away if it were cheap enough though, when working they do a good job. The 453,454,485 scopes have a good CRT that will give years of service. I've been told that the 465-475 series (larger tube) will suffer from CRT burn-out eventually, the 453-454-485 scopes rarely need a new crt. (The company where I got the scope from had bought spare parts to keep all their scopes going, they NEVER replaced a 453-454 crt but used up all their 465-475 crt spares). Article: 101187 of rec.radio.amateur.boatanchors From: Bill Turner Subject: Re: Favorite Tektronix Scope Date: Sun, 01 Jan 2006 15:00:45 -0800 Message-ID: <66ngr1hin5creudun4004eqgp2862945ul@4ax.com> References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> ORIGINAL MESSAGE: On 1 Jan 2006 12:49:22 -0800, "Too_Many_Tools" wrote: >I need to replace an oscilloscope that has gone to the Great Test Bench >in the sky. > >What Tektronix scope do you prefer? > >I have always like the 7000 series...would you recommend these or >another series? > >Thanks > >TMT ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Depends on what you want to use it for. If you want an older, inexpensive, general purpose 100 Mhz scope, I think the 465B (not the 465) was the best Tek ever made. They sold for about $2500 back in the '70s and were worth every penny. Ok, I'm a bit prejudiced because I worked on the production line for both models for three years, testing and calibrating. In that time I did about 2000 of them. They have been out of production for more than 20 years now, but a good one can still be had. Shop around. Tek built them to last. 73, Bill W6WRT p.s. Actual quote from a Tektronix customer: "I gave my purchasing people instructions that they can buy any kind of scope they want, as long as they are blue and come from Beaverton, Oregon." Article: 101188 of rec.radio.amateur.boatanchors From: "john jardine" Subject: Re: Favorite Tektronix Scope Date: Sun, 1 Jan 2006 23:36:27 -0000 Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> "Too_Many_Tools" wrote in message news:1136148561.946351.257400@g44g2000cwa.googlegroups.com... > I need to replace an oscilloscope that has gone to the Great Test Bench > in the sky. > > What Tektronix scope do you prefer? > > I have always like the 7000 series...would you recommend these or > another series? > > Thanks > > TMT > Until last month I'd treasured my Tek 7633. Cost the eqiv' of only $60, yet gave 5 years continuous, unremitting, troublefree service. Lovely bit of kit. Looked right, felt right and offered a vast, soul pleasing array of buttons and knobs. Switched on with the fan purring away, I knew that I was at one with the world. Sadly, the display character generator started to fail. Even bought a service manual and had a poke about. Joy was not to be, a Tek chip was giving up the ghost. I knew then it's life was drawing to an honourable close and another Tek scope would have to be sought. I'd previously fancied the more modern Tek 2445, so downloaded a service manual. Shock-horror!, perusal of the circuitry revealed that there is nothing in them other than a few special Tek chips. Ended up buying a 100MHz Hitachi scope (equiv of $160). It does much more than my old Tek, having benefit of modern uP aided cursors and measurements etc. It's also smaller, lighter and repairable. I love using it but I can't help feeling there's something missing that's really crucial. Something that raises an instrument from the status of 'nice' to that of 'beloved'. (probably the Tek fan :). Obviously I need to get out more. regards john Article: 101189 of rec.radio.amateur.boatanchors From: "Leanne" Subject: Re: Shure mike MK0019 Date: Sun, 1 Jan 2006 18:17:41 -0500 Message-ID: References: <4778854819iapizloj@ehu.es> "gb" wrote in message news:aLmdnRivMvUvwSXenZ2dnUVZ_sydnZ2d@comcast.com... > "Scott Dorsey" wrote in message > news:dp8mdk$ekn$1@panix2.panix.com... > > In article <4778854819iapizloj@ehu.es>, Jon Iza wrote: > >>I got one mike with such model number which has a transistor=20 > >>preamplifier. (It is marked Harris) > >>Does anyone have a copy of the specs and connections???? I have an old Harris xcvr and it has Shure MK0009 microphone. I did not find it in the discontinued list Leanne Article: 101190 of rec.radio.amateur.boatanchors From: jeffreyh@Hawaii.Edu (Jeffrey Herman) Subject: WTB Xtals for Heath HW-202 Date: 1 Jan 2006 23:47:15 GMT Message-ID: I would like to buy the 146.20 / 146.80 pair of crystals for a Heath HW-202. The xtals are probably the standard used in many rigs (rcvr has 10.7 Mc IF; xmtr mutiplication factor is x24). 73, Jeff KH6O -- Chief Petty Officer, U.S. Coast Guard Mathematics Lecturer, University of Hawaii System Article: 101191 of rec.radio.amateur.boatanchors From: James Sweet Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> Message-ID: <87_tf.3536$aB1.2558@trnddc02> Date: Mon, 02 Jan 2006 00:05:24 GMT Too_Many_Tools wrote: > I need to replace an oscilloscope that has gone to the Great Test Bench > in the sky. > > What Tektronix scope do you prefer? > > I have always like the 7000 series...would you recommend these or > another series? > > Thanks > > TMT > I love my 465B, depends on what you need in a scope though. Article: 101192 of rec.radio.amateur.boatanchors From: Paul Burridge Subject: Re: Favorite Tektronix Scope Date: Mon, 02 Jan 2006 00:12:47 +0100 Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> On 1 Jan 2006 12:49:22 -0800, "Too_Many_Tools" wrote: >I need to replace an oscilloscope that has gone to the Great Test Bench >in the sky. > >What Tektronix scope do you prefer? Tek 475. I have fancier scopes that do fancy stuff, but the 475 is an all-time *classic* par excellence. I love it so much I also use it as a decorative centrepiece for the dining room table. -- "What is now proved was once only imagin'd" - William Blake Article: 101193 of rec.radio.amateur.boatanchors Message-ID: <43B870FB.F6590F0C@nospamers.com> From: Rube Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> Date: Mon, 02 Jan 2006 00:17:00 GMT Here is a link to the Tek forun on Yahoo, lots of great info on new and older models. perhaps you can make a few bucks parting out the older scope. http://groups.yahoo.com/group/TekScopes/ Article: 101194 of rec.radio.amateur.boatanchors From: John Larkin Subject: Re: Favorite Tektronix Scope Date: Sun, 01 Jan 2006 16:20:59 -0800 Message-ID: <53sgr1l9of9o6dgv5cq6i9gq1i5c9r6jfl@4ax.com> References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> On 1 Jan 2006 21:00:17 GMT, novatech@eskimo.com (Steven Swift) wrote: >"Too_Many_Tools" writes: > >>I need to replace an oscilloscope that has gone to the Great Test Bench >>in the sky. > >>What Tektronix scope do you prefer? > >>I have always like the 7000 series...would you recommend these or >>another series? > >>Thanks > >>TMT > >I use the new Tek DPO scopes for most work, but keep 7904 (500MHz) with >high speed plug-ins and samplers for the times I need analog. > >You can get 7k scopes for almost nothing. The DPOs will cost a bunch. > >Steve. 7104 is an even nicer analog scope, with its phenomenal writing rate. A used 11801 or 11802 and a sampling head will get you a 12 or 20 GHz dual-trace digital scope for under $2K, a *much* nicer sampling system than the 7000-series stuff. My everyday scope is a TDS2012, which is great for most things. You can take beautiful photos of the color screen for engr notes, manuals, or test procedures. Great plugin: 7A22 (or 1A7A, for the 547) which has switchable bandwidth and differential input down to 10 uV/cm. John Article: 101195 of rec.radio.amateur.boatanchors From: "Mike Andrews" Subject: Re: Favorite Tektronix Scope Date: Mon, 2 Jan 2006 00:44:08 +0000 (UTC) Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <43B847AF.1D169241@hotmail.com> In rec.radio.amateur.homebrew Pooh Bear wrote: > Scott Dorsey wrote: >> Too_Many_Tools wrote: >> >I need to replace an oscilloscope that has gone to the Great Test Bench >> >in the sky. >> > >> >What Tektronix scope do you prefer? >> > >> >I have always like the 7000 series...would you recommend these or >> >another series? >> >> The 7000 series is hard to beat. It's stable, it's not that hard to >> work on, and there are plenty of useful plug-ins available at reasonable >> prices. >> >> That said, I still have a 545 on my bench at work. The calibration contract >> just went over to a new company and the new cal guys aren't really sure what >> to make of it.... > Goodness. I had to get rid of a couple of 545s years ago ( no room to keep them > ). > My current scope at home is a 465. Basic but nice. Tek 465M (465B plus digital meter stuff) is my favorite of the ones in the shop. Next fave is a non-Tek: Phillips PM3055. -- Mike Andrews W5EGO 5WPM mikea@mikea.ath.cx Extra Tired old sysadmin working on his code speed Article: 101196 of rec.radio.amateur.boatanchors From: ritchi50@optonline.net Subject: FS: Amperex 3-500Z 8803 Made In France Message-ID: <44ugr1lp6s17reun80nej5cpkoo0jo8ksf@4ax.com> Date: Sun, 01 Jan 2006 19:49:16 -0500 FS: Amperex 3-500Z 8803 Made In France Price: 150.00 Please reply email. Rich Article: 101197 of rec.radio.amateur.boatanchors From: "Arthur Harrison" References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> Subject: Re: Favorite Tektronix Scope Message-ID: <%Q_tf.214981$qk4.114848@bgtnsc05-news.ops.worldnet.att.net> Date: Mon, 02 Jan 2006 00:54:19 GMT My favorite for LF analog work (<200MHz) is the is the Tek TAS485 They stopped making this, along with all their analog scopes, which is a cryin' shame, since digital really isn't good for everything. -Art "Too_Many_Tools" wrote in message news:1136148561.946351.257400@g44g2000cwa.googlegroups.com... > I need to replace an oscilloscope that has gone to the Great Test Bench > in the sky. > > What Tektronix scope do you prefer? > > I have always like the 7000 series...would you recommend these or > another series? > > Thanks > > TMT > Article: 101198 of rec.radio.amateur.boatanchors Date: Sun, 01 Jan 2006 21:43:36 -0400 From: Bill Subject: Re: FS: Amperex 3-500Z 8803 Made In France References: <44ugr1lp6s17reun80nej5cpkoo0jo8ksf@4ax.com> Message-ID: <489a8$43b88549$4232be47$30505@COQUI.NET> ritchi50@optonline.net wrote: > FS: Amperex 3-500Z 8803 Made In France > Price: 150.00 > Please reply email. > Rich Is it one with the cone shaped top? :) Bill (we're from France) Article: 101199 of rec.radio.amateur.boatanchors From: "YT" References: <44ugr1lp6s17reun80nej5cpkoo0jo8ksf@4ax.com> <489a8$43b88549$4232be47$30505@COQUI.NET> Subject: Re: FS: Amperex 3-500Z 8803 Made In France Message-ID: Date: Mon, 02 Jan 2006 01:51:49 GMT Oh yeah, thats not Eimac but Remulac.... "Bill" wrote in message news:489a8$43b88549$4232be47$30505@COQUI.NET... > ritchi50@optonline.net wrote: > >> FS: Amperex 3-500Z 8803 Made In France >> Price: 150.00 >> Please reply email. >> Rich > > Is it one with the cone shaped top? > > :) > > Bill > (we're from France) Article: 101200 of rec.radio.amateur.boatanchors From: Jim Yanik Subject: Re: Favorite Tektronix Scope Date: 2 Jan 2006 01:50:43 GMT Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <1136164871.509477.182630@z14g2000cwz.googlegroups.com> "Too_Many_Tools" wrote in news:1136164871.509477.182630@z14g2000cwz.googlegroups.com: > Does anyone have a history of the 7000 series? What you want is the book "Winning with People;The First 40 Years of Tektronix",by Marshall M.Lee,published by Tektronix,10/86 There's no ISBN number,though.Maybe you can find a copy on Ebay. It's a fantastic story about Tek from start to the late 1980's. Unfortunately,it does not cover the decline of Tek. > The newer > scopes are reaching the point of throw away status with no parts > available and if by chance they are, the price prevents a reasonable > repair. That is the new TEK. -- Jim Yanik jyanik at kua.net Article: 101201 of rec.radio.amateur.boatanchors Message-ID: <43B88AF8.7D07133B@hotmail.com> Date: Mon, 02 Jan 2006 02:07:52 +0000 From: Pooh Bear Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <66ngr1hin5creudun4004eqgp2862945ul@4ax.com> <4de2aa6286dave@davenoise.co.uk> "Dave Plowman (News)" wrote: > In article <66ngr1hin5creudun4004eqgp2862945ul@4ax.com>, > Bill Turner wrote: > > If you want an older, inexpensive, general purpose 100 Mhz scope, I > > think the 465B (not the 465) was the best Tek ever made. They sold for > > about $2500 back in the '70s and were worth every penny. > > Yup. Does everything most need from a scope. But in the UK, they still > fetch decent money. You'll find them regularly on ebay btw. I'd rather like a 2465 though. They do indeed fetch quite a fair price still. Graham Article: 101202 of rec.radio.amateur.boatanchors From: Bill Turner Subject: Re: Favorite Tektronix Scope Date: Sun, 01 Jan 2006 18:05:09 -0800 Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> ORIGINAL MESSAGE: On Mon, 02 Jan 2006 00:12:47 +0100, Paul Burridge wrote: >I have fancier scopes that do fancy stuff, but the 475 is an all-time >*classic* par excellence. I love it so much I also use it as a >decorative centrepiece for the dining room table. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Now there's my kind of guy!! 73, Bill W6WRT Article: 101203 of rec.radio.amateur.boatanchors From: Spehro Pefhany Subject: Re: Favorite Tektronix Scope Date: Sun, 01 Jan 2006 23:47:45 -0500 Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> On Sun, 01 Jan 2006 18:05:09 -0800, the renowned Bill Turner wrote: > >ORIGINAL MESSAGE: > >On Mon, 02 Jan 2006 00:12:47 +0100, Paul Burridge > wrote: > >>I have fancier scopes that do fancy stuff, but the 475 is an all-time >>*classic* par excellence. I love it so much I also use it as a >>decorative centrepiece for the dining room table. > >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > >Now there's my kind of guy!! > >73, Bill W6WRT He's crocheted the nicest doily and 'scope cosy for it too. Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com Article: 101204 of rec.radio.amateur.boatanchors From: "Fred W4JLE" References: <8b1b$43b830b6$471d2513$2649@ALLTEL.NET> <1136172590.376754.61300@f14g2000cwb.googlegroups.com> Subject: Re: CU 168/FRR Date: Sun, 1 Jan 2006 23:49:24 -0500 Message-ID: <824ef$43b8b108$471d2513$21311@ALLTEL.NET> Thank you Sir, the info is appreciated. wrote in message news:1136172590.376754.61300@f14g2000cwb.googlegroups.com... > > More info here: http://www.skirrow.org/Boatanchors/TechTalk5.pdf > > Probably worth no more than $100 tops. > > Les > > leslocklearatcableonedotnet > > fix above to reply > Article: 101205 of rec.radio.amateur.boatanchors From: Robert Baer Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> Message-ID: Date: Mon, 02 Jan 2006 06:38:03 GMT Scott Dorsey wrote: > Too_Many_Tools wrote: > >>I need to replace an oscilloscope that has gone to the Great Test Bench >>in the sky. >> >>What Tektronix scope do you prefer? >> >>I have always like the 7000 series...would you recommend these or >>another series? > > > The 7000 series is hard to beat. It's stable, it's not that hard to > work on, and there are plenty of useful plug-ins available at reasonable > prices. > > That said, I still have a 545 on my bench at work. The calibration contract > just went over to a new company and the new cal guys aren't really sure what > to make of it.... > --scott Well, you *could* earn consulting fees to train them... Article: 101206 of rec.radio.amateur.boatanchors From: Bill Turner Subject: Re: Favorite Tektronix Scope Date: Sun, 01 Jan 2006 22:19:18 -0800 Message-ID: <2ehhr1177a399sv3eildusvc9hnfb4jt32@4ax.com> References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> ORIGINAL MESSAGE: On Sun, 01 Jan 2006 23:47:45 -0500, Spehro Pefhany wrote: >He's crocheted the nicest doily and 'scope cosy for it too. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Just thinking about it brings tears to my eyes. :-) 73, Bill W6WRT Article: 101207 of rec.radio.amateur.boatanchors From: john_c@tpg.com.au (John Crighton) Subject: Re: Favorite Tektronix Scope Date: Mon, 02 Jan 2006 07:08:18 GMT Message-ID: <43b8cb5f.32800902@free.teranews.com> References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <66ngr1hin5creudun4004eqgp2862945ul@4ax.com> On Sun, 01 Jan 2006 15:00:45 -0800, Bill Turner wrote: > >If you want an older, inexpensive, general purpose 100 Mhz scope, I >think the 465B (not the 465) was the best Tek ever made. They sold for >about $2500 back in the '70s and were worth every penny. > >Ok, I'm a bit prejudiced because I worked on the production line for >both models for three years, testing and calibrating. In that time I >did about 2000 of them. Hello Bill, you specifically say "465B (not the 465) was the best Tek ever made" Can you elaborate a little bit more there Bill. As a Tekscope enthusiast, I am just interested to know what the improvements were to the 465B over the 465 to make it more highly sought after. Regards, John Crighton Sydney Article: 101208 of rec.radio.amateur.boatanchors From: john_c@tpg.com.au (John Crighton) Subject: Re: Favorite Tektronix Scope Date: Mon, 02 Jan 2006 08:24:23 GMT Message-ID: <43b8d277.34617210@free.teranews.com> References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> On Sun, 01 Jan 2006 18:10:16 -0500, Ken Scharf wrote: >I have a Tek 454 that I got at a company auction years back where >I used to work (paid $150 for it). The 453,453A,454, 454A series >are easy to work on, Hello Ken, I also have a Tek 454. I bought that model because I read on groups like this that it is "easy" to work on. I must respectively disagree with you. My 454 is "not easy" to work on and yet I see people saying that it is. I am just wondering if you are repeating what you have read on the internet supporting a Myth that the 454 is easy to work on or speaking from practical experience. I would like to clean the switch wafers of the main timebase switch. My 454 is put together like an onion. How do I "easily" gain access to this switch, which is buried in the heart of the onion? Slip the covers off your instrument, yes that is very easy, a matter of seconds. Now have a look and tell me how to clean the timebase switch? How many hours would it take to remove the soldered wiring off the boards so that they can be removed to gain access to the switch and then solder the wires back with nice factory quality solder joints, not with quick blob soldering with insulation peeling back off the wires. Quality work only. Several minutes work would be easy if there was connectors on the boards but not in this scope. When we talk about "hours" we are in a different category......pain in the butt/difficult. How long would it take you, Ken, to clean the switch >from woa to go? Scope back up and working? How long would it take you to remove the fan, fan wiring tag strips and fan mounting brackets? How do you get your screw driver on the screws holding the brackets when there are modules covering them up? Just have a quick look then come back and tell me if you still reckon this scope is easy to work on, in the inner sanctums. Regards, John Crighton Sydney Article: 101209 of rec.radio.amateur.boatanchors From: Winfield Hill Subject: Re: Favorite Tektronix Scope Date: 2 Jan 2006 02:50:58 -0800 Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> John Crighton wrote... > > I would like to clean the switch wafers of the main > timebase switch. My 454 is put together like an onion. > How do I "easily" gain access to this switch, > which is buried in the heart of the onion? I hope you're giving a hypothetical example, because if you really do need to "clean" a Tektronix scope switch, your scope may already be a lost cause. Time to move on. -- Thanks, - Win Article: 101210 of rec.radio.amateur.boatanchors From: "Charlie Hugg" Subject: FS FT-102 Tech Special Message-ID: Date: Mon, 2 Jan 2006 09:18:31 -0600 I have a Yaesu FT-102 HF Transceiver for sale. This one was Malcomized by Mal, NC4L in March of 1997. It has had all of the relays replaced plus other upgrades performed by Mal. It has a CW Filter but no AM/FM Board. Cosmetically it is in good but not mint shape. The cabinet looks good and the front panel is nice. There are some small nicks and scratches mainly on the trim around the outside of the front panel. It works but has problems. On bands above 20 meters, sensitivity is low as is power output. It loads up to over 100 watts on 20. On 40 meters the VFO does not change frequency. One meter lamp is burned out. Price is $375 plus shipping. No mic or manual. Thanks, Charlie Hugg, K5MBX -- ________________________________ See my Signal/One, Collins & Drake Photo Galleries and my Hallicrafters Virtual Museum at http://hug-a-bug.com Article: 101211 of rec.radio.amateur.boatanchors From: Bill Turner Subject: Re: Favorite Tektronix Scope Date: Mon, 02 Jan 2006 07:07:38 -0800 Message-ID: <23gir1t52clig3039ng97i7jrmfjj2mj94@4ax.com> References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <66ngr1hin5creudun4004eqgp2862945ul@4ax.com> <43b8cb5f.32800902@free.teranews.com> ORIGINAL MESSAGE: On Mon, 02 Jan 2006 07:08:18 GMT, john_c@tpg.com.au (John Crighton) wrote: >Hello Bill, >you specifically say "465B (not the 465) was the best Tek ever made" > >Can you elaborate a little bit more there Bill. As a Tekscope >enthusiast, I am just interested to know what the improvements >were to the 465B over the 465 to make it more highly sought after. > >Regards, >John Crighton >Sydney ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In spite of having the number in common, the 465 and 465B are completely different scopes. Their performance specs are nearly identical but inside the box, their circuitry is completely different. The "B" is much easier to calibrate and uses soldered-in transistors instead of socketed ones, a great advantage especially when the scope gets old and sockets start to get cranky. I wouldn't turn down a 465 if that was the only thing available, but all us calibration techs greatly preferred the 465B. 73, Bill W6WRT Article: 101212 of rec.radio.amateur.boatanchors From: Bill Turner Subject: Re: Favorite Tektronix Scope Date: Mon, 02 Jan 2006 07:12:25 -0800 Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> ORIGINAL MESSAGE: On Mon, 02 Jan 2006 08:24:23 GMT, john_c@tpg.com.au (John Crighton) wrote: >I also have a Tek 454. I bought that model >because I read on groups like this that it is "easy" >to work on. I must respectively disagree with you. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ John is right. Tek scopes are not "easy" to work on, at least not the solid state ones. My first day on the job as a 465 calibration tech I went home with a headache and almost called in the next day and quit. I had done TV repair for 20 years but had never seen such complicated, unfamiliar circuitry or construction. Fortunately I stuck it out and came to appreciate them for what they were: The best scopes in the world. 73, Bill W6WRT Article: 101213 of rec.radio.amateur.boatanchors From: Bill Turner Subject: Re: Favorite Tektronix Scope Date: Mon, 02 Jan 2006 07:21:22 -0800 Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> ORIGINAL MESSAGE: On 2 Jan 2006 02:50:58 -0800, Winfield Hill wrote: > I hope you're giving a hypothetical example, because if > you really do need to "clean" a Tektronix scope switch, > your scope may already be a lost cause. Time to move on. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ If Tek scopes of that vintage have one Achilles heel, it's the tiny fork-shaped switch contacts used in many places throughout the unit.. Rarely do they need "cleaning", but rather the contact presssure needs to be increased slighty. If you know how to do it, it's a quick, easy fix, but if you don't you can easily destroy the contact. Because the "fork" of the switch was designed to press against gold plating, they made the contact pressure as light as possible to prolong the life of the relatively soft gold. In some cases, it is just too light and erratic operation is the result. Here's how to do it right: With a small screwdriver, gently push against the "U" of the fork, just a tiny amount. The idea is you want to bend the fork down WITHOUT bending the spring it is attached to. Under no circumstances try to bend the spring or you will almost certainly destroy it. Bend only the little gold fork, and bend it only a very small amount. Done right, it works every time. 73, Bill W6WRT Article: 101214 of rec.radio.amateur.boatanchors Message-ID: From: Bill Subject: Collins R-278B Receiver Date: Mon, 02 Jan 2006 16:13:56 GMT Is this RX as rare as the seller believes it is?? Http://cgi.ebay.co.uk/A-C-E-C-Model-R-278B-GR_W0QQitemZ5849592218QQcatego ryZ4673QQrdZ1QQcmdZViewItem -- Bill G8IAY Article: 101215 of rec.radio.amateur.boatanchors From: "G9BF Calling!" References: <1136108443.072721.227790@g47g2000cwa.googlegroups.com> Subject: Re: Whats been done to these? - BC453, BC455 Date: Mon, 2 Jan 2006 16:14:11 -0000 Message-ID: <43b9513b$0$82640$ed2619ec@ptn-nntp-reader03.plus.net> Hi Andrew, Tried to reply direct to your posting but the sever says your mailbox is full! 73, "Andrew VK3BFA" wrote in message news:1136108443.072721.227790@g47g2000cwa.googlegroups.com... > Hi All, > I recently was given two "Command" receivers from a sk estate, and > would like to get them going (restoration would be a bit tooo ambitious > - too many extra holes, mods, hacks). This is my first "vintage" > project, and would welcome comment on the following (to me) weird > points. > > They were bolted together (literally) a BC453 (190Khz to 550Khz) and > a BC455 (6 to 9.1Mhz).The hf one fed the LF one, the BC453 being used > presumably as a "tunable IF - well and good, except that > > The 2nd and 3rd IF transformers on the BC455 had been replaced with > ones marked "85Khz" - the first IF/Converter one was 2.83 Mhz, which is > how it was meant to be. Given that the BC453 wouldnt tune EITHER of > these 2 "IF" frequencies, something radical has been done to them! > > My question - was this some sort of popular surplus conversion - does > anyone have any idea on how to un-do this butchery - I dont have > "spare" 2.83Mhz if cans, so......am I better of trying to do something > with these, or throwing them back into storage until I find something > thats a more realistic prospect of repair, and keeping these for spare > parts? > > I do have the AN/ARC5 manual on my PC, in djvu format - Its > cumbersome, to say the least - not searchable, and at 350 pages, too > big to print out. Any "quick and simple" guides to these things? > > Oh, and BTW - the tube mix is all over the place, all 6 volts, one IF > replaced by a 6AC7 - most of the rest unreadable due age etc. And a > 6F6 on the BC453 as an audio output tube... > > Help!!!! > > de VK3BFA Andrew. > Article: 101216 of rec.radio.amateur.boatanchors From: PaulCsouls Subject: Re: Favorite Tektronix Scope Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> Date: Mon, 02 Jan 2006 17:53:28 GMT On Mon, 02 Jan 2006 07:21:22 -0800, Bill Turner wrote: > >ORIGINAL MESSAGE: > >On 2 Jan 2006 02:50:58 -0800, Winfield Hill > wrote: > >> I hope you're giving a hypothetical example, because if >> you really do need to "clean" a Tektronix scope switch, >> your scope may already be a lost cause. Time to move on. > > >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > >If Tek scopes of that vintage have one Achilles heel, it's the tiny >fork-shaped switch contacts used in many places throughout the unit.. > >Rarely do they need "cleaning", but rather the contact presssure needs >to be increased slighty. If you know how to do it, it's a quick, easy >fix, but if you don't you can easily destroy the contact. > >Because the "fork" of the switch was designed to press against gold >plating, they made the contact pressure as light as possible to >prolong the life of the relatively soft gold. In some cases, it is >just too light and erratic operation is the result. > >Here's how to do it right: With a small screwdriver, gently push >against the "U" of the fork, just a tiny amount. The idea is you want >to bend the fork down WITHOUT bending the spring it is attached to. >Under no circumstances try to bend the spring or you will almost >certainly destroy it. Bend only the little gold fork, and bend it only >a very small amount. Done right, it works every time. > >73, Bill W6WRT I just had a 485 go flaky. I had to push on the front cover to get it to work. Is there a web site or a book that would help me get it going again? Thanks PaulC Article: 101217 of rec.radio.amateur.boatanchors From: Rich Grise Subject: Re: Favorite Tektronix Scope Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> Date: Mon, 02 Jan 2006 19:07:21 GMT On Sun, 01 Jan 2006 12:49:22 -0800, Too_Many_Tools wrote: > I need to replace an oscilloscope that has gone to the Great Test Bench > in the sky. > > What Tektronix scope do you prefer? > > I have always like the 7000 series...would you recommend these or > another series? > > Thanks > > TMT If Tektronix scopes are still as good as I've always known them to be, then the only consideration should be your budget. Then get the toppest-of-the-line you can afford. Have Fun! Rich Article: 101218 of rec.radio.amateur.boatanchors From: Paul Burridge Subject: Re: Favorite Tektronix Scope Date: Mon, 02 Jan 2006 20:21:03 +0100 Message-ID: <06vir11bgn46e0vsjcveg3ub8oe8psqr14@4ax.com> References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> On Mon, 02 Jan 2006 08:24:23 GMT, john_c@tpg.com.au (John Crighton) wrote: >On Sun, 01 Jan 2006 18:10:16 -0500, Ken Scharf > wrote: > > >>I have a Tek 454 that I got at a company auction years back where >>I used to work (paid $150 for it). The 453,453A,454, 454A series >>are easy to work on, > > >Hello Ken, >I also have a Tek 454. I bought that model >because I read on groups like this that it is "easy" >to work on. I must respectively disagree with you. I came across this on the 'net, which may or may not be useful in your particular case, John... How to FIX the Fuzzy/Wide Trace on Your Tek 465 or 475 Scope! -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Cleaning the Volts/Div Attenuator Switch Contacts in Tektronix 4XX Oscilloscopes -------------------------------------------------------------------------------- It might work wonders for your classic Tektronix 400-series scope. And you can probably do it yourself, even if you've never opened a scope, before! (C) Copyright 2004, by Thomas P. Gootee -------------------------------------------------------------------------------- Here is a copy of the procedure that I sent to a guy with a Tek 475 that had a fuzzy trace, and "distorted" when he adjusted the volts/div knob. His original email is below, followed by my reply. -------------------------------------------------------------------------------- --------- Original message -------- From: "Mike D" To: "tomg@fullnet.com" Date: 01-30-03 08:41 Do you repair scopes? I have a tek 475 that powers up but is very fuzzy and distorts when adjusting the volts/division knob. I don't know if its worth repairing or if you can reccomend a better scope from your stock for a comparable price. Thank You Mike -------------------------------------------------------------------------------- Mike, Yes. I do repair *lots* of oscilloscopes. I do it mainly for in-house instruments that are to be resold. But, I also do it occasionally on a fee-for-service basis. The symptoms you describe sound familiar and it sounds like a pretty easy repair job, which I could complete for $50. However, depending on your location, if you are in the continental USA, the shipping could be $20 to $30 or more, each way. So, let me tell you what I would try first and maybe you can do it yourself. (I'd hate to see someone spend more than $100 for something that they might be able to do in less than 30 to 60 minutes.) Without seeing the scope myself, I could easily be wrong. But, from your description, my opinion is that, most-likely, the switch contacts in the volts/div attenuators (and/or also in the trigger-view and bandwidth-limiter) are dirty or oxidized. They are very easy to get to and to clean. And, although it might sound a little daunting to a first-timer, it really isn't difficult at all, requires only very-basic tools and supplies, and will probably work wonders for your scope's performance. Here is the basic procedure: Unplug the scope and place it on a large, flat, smooth surface, such as a table or floor. Remove the scope's case: Start by removing the four screws in the rear panel's cord-wrap feet. They may be either Phillips-head or "star" (Torx) types. The feet may come off along with the screws. There are usually also two other screws, near the top and bottom of the rear panel, in the center. Remove them, too. After all six of the screws have been removed, rotate the carry-handle up and out of the way of the front panel, probably to the "straight up" position. It is recommended that you stand the scope on its front panel end and pull the case up and off. But, if you DON'T have a front panel COVER, you can either try it anyway, hopefully on a padded surface (and carefully!), or else just leave the scope sitting on its feet. >From the rear of the scope, with your fingers on the sides of the case, push on the rear panel with your thumbs. If the scope is not standing on its front panel end, you will need to be very careful, as the scope slides out of the case, to also support the front end, keeping it up, so the bottom front edge of the case does not damage any of the internal parts of the scope by scraping against them. Note that if the scope's CASE is DENTED, especially if it's dented on a corner-edge, it could be *VERY* difficult to remove the scope from its case! It might then require *QUITE* A BIT of brute force, pushing on the rear panel (or pulling on the edges of the front panel) and pulling on the rear edges (or pushing on the front edges) of the case. (Sometimes, in that situation, it helps to alternate between trying to move the left and right sides; and maybe even also to alternate between moving the top and bottom.) After the scope is out (whew!), see the note in the next paragraph, and then carefully stand the scope on its SIDE, so that the vertical board, on the side of the scope, behind the v/div knobs, is facing UP. NOTE! I usually try to lift and move the scope's internal assembly ONLY by the edges of the front panel (or CRT bezel) and rear panel, or other solid structural/steel parts. And be careful not to set the scope on any objects or uneven surfaces that might touch any of the internal components. Just behind the volts/div knobs, inside the scope, there are two silver, metal "boxes", which house the attenuator/switch assemblies. Remove all of the necessary screws to open the top of one of the boxes. (Do only one box at a time.) Inside the box, there are four little rectangular, plastic "attenuator modules", each usually labeled with "somenumber X" (e.g. "4X"). Using a longnose pliers, or something similar (or whatever works), grasp one of them and pull *straight* up, to remove it. I'm not sure if they're static-sensitive, or not. But, just in case they are, I would lay it either on an all-metal part of the scope, or on a piece of aluminum foil, or something like that (i.e. on bare metal), with the pins facing down. I usually only remove one attenuator module at a time, just so I don't get them mixed up. But you could do two at a time, if it's more convenient (which it often is). While looking at the area of the circuit board where the attenuator module came from, rotate the corresponding v/div switch back and forth, until you can see which positions raise and lower the tiny gold U-shaped double-contact sets, up and down, from/to the circuit board. Cut a small piece of clean, white paper, as lint-free as possible, into a thin strip, a little wider than one set of contacts, and long enough for you to handle/manipulate (probably something like three or four inches long and 3/16"-or-so wide?). Do not use cloth, which might snag, or anything abrasive. (You may need to cut new pieces, periodically, as you go through this procedure.) Turn the volts/div knob, to raise the set of contacts that you're about to clean, up and away from the board. Carefully slide one end of the paper under the contacts. Apply a drop or two (or three) of isopropyl (rubbing) alcohol to the paper, under the contacts. It's OK to get it on the contacts, board, etc, too. I assume that the more concentrated the isopropyl is, the better. But I've had good results using the plain 70% drugstore type, and the 90% drugstore type. (The results would probably be even better if you use Caig's "De-Oxit" product, for the cleaning, followed by Caig's "Pro-Gold". They're available at Caig's Website.) Immediately turn the volts/div switch so that the contacts are lowered against the paper and then (carefully!) pull the paper *straight* out >from under the contacts. This should probably be repeated several times for each set of contacts. Be careful. If you bend the contacts, you may be in trouble. And they are *quite* fragile. But, it should be fine as long as you try to pull the paper as parallel to the board as possible. Certainly, don't ever pull straight *upward* on it, and not even more upward than sideways. Also, NOTE that a couple of the contact-pairs, the two that are nearest to the front of the scope, are raised and lowered by the AC/GND/DC lever-switch, instead of by the volts/div switch. When all of the visible contacts have been cleaned that way, replace the attenuator module, carefully, by pushing its pins back into the holes in the circuit board and then pushing it all the way in. (It might not hurt to also clean the attenuator module's pins, although I've never needed to, nor tried to.) [If you *DO* happen to have some of Caig's "De-Oxit" product, it might be good to apply a tiny amount to each pin of each attenuator block. I usually also apply it to the metal shield, wherever it makes contact with the screws or their mountings (and the the screw-posts/mountings themselves), and wherever the shield makes contact with any other metal surfaces, and also on those metal surfaces themselves. And the screws themselves should also be treated, as should any nearby "ground" screws (i.e. loosen, treat/clean, and re-seat). ALSO, make sure that you treat the grounding "spring" that protrudes up from one of the screws, where the crew touches it, and on its top where it touches the scope's case (and also do that part of the inside of the case). You can often SEE the difference in color of the metal, as the oxidation is removed, especially if you use the concentrated form of De-Oxit that comes in the small plastic "needle-dropper" bottle.] Replace any attenuator modules that won't be in the way, any more. Then, remove the next attenuator module(s) and repeat the above procedures, until you've gotten to all of the switch contacts in the "box". When one whole channel's switches are done, replace the metal cover over the attenuator/switch assembly and do the second channel in exactly the same way (or, what the heck, maybe *better*, if that was your first time...). [NOTE that the "fingers" that may be on one side of the shield/box need to go back into the same position that they were in before the top was removed.] Now that you know what the tiny, gold switch contacts LOOK like, you will be able to much-more-easily find the SIMILAR ones that are on the SAME circuit board, but are toward the REAR of the scope, near the middle of the board. There is no cover over them. So they're MUCH easier to get to. There should be one group of four of them and another group of two of them. Moving the Bandwidth-Limiter and Trigger-View controls, on the front panel, will raise and lower them. Clean them in the same way as described above, for the attenuator switch contacts. One OTHER thing to check: (I'm not sure, at the moment, if this is only for the 465 model, or if it also applies to the 475:) JUST behind the metal attenuator/switch shield "boxes", there may be a screw that connects a metal piece of the box/shield to the circuit board. If that screw is loose (which I have seen on about a third of the 465 scopes I've worked on!), or if it doesn't make good contact, you may see very noticeable effects in the trace(s), such as fuzziness or distortion, and may see trace-distortion effects when adjusting the trigger-level control (possibly especially-so at the highest frequencies), and possibly other triggering problems. If cleaning the switch contacts doesn't fix the problems you're having with the "fuzzy" or wide trace, and the attenuator switch anomalies, further diagnosis and repair may be necessary. Let me know if you try this, and how it works. If you would still like me to work on your scope, just let me know. And let me know if I can be of more help. Thanks again! Best regards, Tom Tom Gootee tomg@fullnet.com http://www.fullnet.com/u/tomg -- "What is now proved was once only imagin'd" - William Blake Article: 101219 of rec.radio.amateur.boatanchors From: Phil Hobbs Subject: Re: Favorite Tektronix Scope Date: Mon, 02 Jan 2006 15:41:26 -0500 Message-ID: <43B98FF6.8080307@us.ibm.com> References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <53sgr1l9of9o6dgv5cq6i9gq1i5c9r6jfl@4ax.com> John Larkin wrote: > > 7104 is an even nicer analog scope, with its phenomenal writing rate. Seconded. That microchannel plate CRT is a thing of great beauty. I used to use one with the Polaroid film plate on the front when I was a grad student. They had a pretty nice analog storage scope whose number I forget--it was a portable and looked a lot like a 485. > > A used 11801 or 11802 and a sampling head will get you a 12 or 20 GHz > dual-trace digital scope for under $2K, a *much* nicer sampling system > than the 7000-series stuff. I have an 11801A that I use all the time, with the 40 GHz sampling head. I got it for about a fifth of the cost of the overpriced modern version. LeCroy is selling a 100 GHz sampling scope, which uses the Picosecond Pulse Labs 100 GHz sampler. Used to be that LeCroy made nice user interfaces but couldn't build a vertical amplifier to save their lives. Cheers, Phil Hobbs Article: 101220 of rec.radio.amateur.boatanchors From: john_c@tpg.com.au (John Crighton) Subject: Re: Favorite Tektronix Scope Date: Mon, 02 Jan 2006 21:45:53 GMT Message-ID: <43b98f53.4708397@free.teranews.com> References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> On 2 Jan 2006 02:50:58 -0800, Winfield Hill wrote: >John Crighton wrote... >> >> I would like to clean the switch wafers of the main >> timebase switch. My 454 is put together like an onion. >> How do I "easily" gain access to this switch, >> which is buried in the heart of the onion? > > I hope you're giving a hypothetical example, because if > you really do need to "clean" a Tektronix scope switch, > your scope may already be a lost cause. Time to move on. > > >-- > Thanks, > - Win In the 1960s Tek did sell a switch servicing kit for the large dog kennel size 500 series models with wafer style rotary switches. I remember a pouch containing several bightly coloured pencil sized applicators of oil, grease and various cleaning fluids. "Time to move on" Oh no! I would never get rid of an instrument for the want of a bit of effort. My 454 is now on the reserve bench as back up scope number 3 behind a couple of 465 scopes. My 454 has a nice clip on metal cover to protect the front panel. This is the scope I am more comfortable with lending to friends, knowing that the front panel is not going to get bashed in transit in the back of a car. The slight intermittent problem with the timebase switch is minor, I can live with that. My 454 from the late 60s has big wafer switches just like the big 500 series scopes so cleaning these big wafer switches is easy providing you can get access to them. Access is the problem in the 454. Bill Turner mentioned the U shaped contacts in the 465. Yes that was tricky tending to them but they are getatable. I would never dump a piece of test gear because of dodgy switches. I just don't have the heart to dump any test equipment. I should try and be stronger but I can't. Being a test equipment nut is a life crippling disease. :-) Regards, John Crighton Sydney Article: 101221 of rec.radio.amateur.boatanchors Message-ID: <43B99F5E.E54DC3CC@nospamershere.com> From: Rube Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> Date: Mon, 02 Jan 2006 21:47:10 GMT > Here is a link to the Tek forun on Yahoo, > lots of great info on new and older models. > > http://groups.yahoo.com/group/TekScopes/ > > > I just had a 485 go flaky. I had to push on the front cover to get it > to work. Is there a web site or a book that would help me get it going > again? > > Thanks > PaulC Article: 101222 of rec.radio.amateur.boatanchors From: kludge@panix.com (Scott Dorsey) Subject: Re: Favorite Tektronix Scope Date: 2 Jan 2006 16:56:05 -0500 Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> John Crighton wrote: > >My 454 is "not easy" to work on and yet I see people >saying that it is. I am just wondering if you are repeating >what you have read on the internet supporting a Myth >that the 454 is easy to work on or speaking from >practical experience. Everything is relative. If you think the 454 is hard to work on, you should just SEE the insides of the 7000. Likewise the 7000 is a whole lot easier to work on than the latest generation of digital scopes. >I would like to clean the switch wafers of the main >timebase switch. My 454 is put together like an onion. >How do I "easily" gain access to this switch, >which is buried in the heart of the onion? If the switch wafers really are bad, the easiest thing to do is to use Cramolin with a very long spray tube. You can get it into very small places without having to do as much dissasembly. But make sure the contacts are tight, first. I don't see contact cleaning needed on the scopes of this era, although some of the older ones did. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." Article: 101223 of rec.radio.amateur.boatanchors From: John Larkin Subject: Re: Favorite Tektronix Scope Date: Mon, 02 Jan 2006 13:58:13 -0800 Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <53sgr1l9of9o6dgv5cq6i9gq1i5c9r6jfl@4ax.com> <43B98FF6.8080307@us.ibm.com> On Mon, 02 Jan 2006 15:41:26 -0500, Phil Hobbs wrote: >John Larkin wrote: > >> >> 7104 is an even nicer analog scope, with its phenomenal writing rate. > >Seconded. That microchannel plate CRT is a thing of great beauty. I used to >use one with the Polaroid film plate on the front when I was a grad student. > >They had a pretty nice analog storage scope whose number I forget--it was a >portable and looked a lot like a 485. >> >> A used 11801 or 11802 and a sampling head will get you a 12 or 20 GHz >> dual-trace digital scope for under $2K, a *much* nicer sampling system >> than the 7000-series stuff. > >I have an 11801A that I use all the time, with the 40 GHz sampling head. I >got it for about a fifth of the cost of the overpriced modern version. When you start getting powerup timebase errors, which you will, call me. > >LeCroy is selling a 100 GHz sampling scope, which uses the Picosecond Pulse >Labs 100 GHz sampler. Used to be that LeCroy made nice user interfaces but >couldn't build a vertical amplifier to save their lives. > I'm still mad at Walter for a dirty trick he pulled about 20 years ago. I built an ff&f equivalent of his 4208 Camac 1 ns TDC module, at a customer's request. So he cut his price in half the next time he bid, specifically to kill me. The customer, bless his heart, disqualified LeCroy on "technical grounds." John Article: 101224 of rec.radio.amateur.boatanchors From: "Richard W. Solomon, W1KSZ" Subject: Re: Favorite Tektronix Scope Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> Date: Mon, 02 Jan 2006 22:01:01 GMT Depends on your needs, bandwidth, sensitivity, etc. But for a generic all-purpose Tektronix scope you cannot beat the 7603. Dick, W1KSZ On 1 Jan 2006 12:49:22 -0800, "Too_Many_Tools" wrote: >I need to replace an oscilloscope that has gone to the Great Test Bench >in the sky. > >What Tektronix scope do you prefer? > >I have always like the 7000 series...would you recommend these or >another series? > >Thanks > >TMT Article: 101225 of rec.radio.amateur.boatanchors From: kludge@panix.com (Scott Dorsey) Subject: Re: Favorite Tektronix Scope Date: 2 Jan 2006 17:21:25 -0500 Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <53sgr1l9of9o6dgv5cq6i9gq1i5c9r6jfl@4ax.com> <43B98FF6.8080307@us.ibm.com> On the basic Tektronix thread, I still have this Tek 650HR with a luminance problem. It appears to be the "PLRT INV & TRIG PICK-OFF" chip, which is a Tektronix 155-0216-00. Earlier revisions used a Tektronix 155-0032-00. Tek says support for the monitor (and probably for the rest of the Group 26 products) was discontinued in 1996. They can't tell me what the original manufacturer's part number is, or even who the original manufacturer of the chip was, and the service manual lists only the house number. Any Tek technicians happen to have some of these in the junk box, or know what the real part number is? The input that takes the base comparison voltage from the aperture pot is pulling the input way down. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." Article: 101226 of rec.radio.amateur.boatanchors From: Jim Thompson Subject: Re: Favorite Tektronix Scope Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <53sgr1l9of9o6dgv5cq6i9gq1i5c9r6jfl@4ax.com> <43B98FF6.8080307@us.ibm.com> Date: Mon, 02 Jan 2006 15:28:54 -0700 On Mon, 02 Jan 2006 13:58:13 -0800, John Larkin wrote: [snip] > >I'm still mad at Walter for a dirty trick he pulled about 20 years >ago. I built an ff&f equivalent of his 4208 Camac 1 ns TDC module, at >a customer's request. So he cut his price in half the next time he >bid, specifically to kill me. The customer, bless his heart, >disqualified LeCroy on "technical grounds." > >John > I've had that happen once. A competing company with nearly 20 staff quoted 1/3 what I quoted for a design job. The potential customer said, "Something's fishy", and gave the contract to me. ...Jim Thompson -- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food. Article: 101227 of rec.radio.amateur.boatanchors From: Roy Lewallen Subject: Re: Favorite Tektronix Scope Date: Mon, 02 Jan 2006 14:49:23 -0800 Message-ID: <11rjbfkmhc57t17@corp.supernews.com> References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <53sgr1l9of9o6dgv5cq6i9gq1i5c9r6jfl@4ax.com> <43B98FF6.8080307@us.ibm.com> Scott Dorsey wrote: > On the basic Tektronix thread, I still have this Tek 650HR with a luminance > problem. It appears to be the "PLRT INV & TRIG PICK-OFF" chip, which is > a Tektronix 155-0216-00. Earlier revisions used a Tektronix 155-0032-00. > > Tek says support for the monitor (and probably for the rest of the Group 26 > products) was discontinued in 1996. They can't tell me what the original > manufacturer's part number is, or even who the original manufacturer of the > chip was, and the service manual lists only the house number. > > Any Tek technicians happen to have some of these in the junk box, or know > what the real part number is? The input that takes the base comparison > voltage from the aperture pot is pulling the input way down. > --scott Parts with numbers beginning with 155 are Tek designed and made - they had their own IC design and production facility. So that's the "real" part number. I don't know of any Tek made ICs for which anyone else makes an even roughly equivalent part -- if they did, Tek would have bought them instead of designing and manufacturing their own, which cost a small fortune. Roy Lewallen, W7EL Article: 101228 of rec.radio.amateur.boatanchors Message-ID: From: Bill Subject: Re: Collins R-278B Receiver References: Date: Mon, 02 Jan 2006 23:16:18 GMT In message , K3HVG writes >Bill, >The R-278, part of the GRC-27, if my memory serves me. The GRC-27 >consists of a transmitter, receiver, and modulator/power supply in a large >vertical cabinet. It weighs a ton... or more.. hi! The receiver is neither >rare nor desirable, per se. The receiver is of the older ilk of UHF military >receivers. It only has 100kHz channel spacing from 225-399.0MHz. The >later equipment has channel spacing of either 50kHz or (as the current >eqpt does)25kHz spacing. I suppose if one were to be resurrecting a >mobile control tower or the like, one might want one of these. Again, >though, its only one part of the actual radio set. That's my take on it. >Having said the above, I had one "on the air" a number of years ago that I >got from the AF MARS program. It was impressive to demo it to friends >but that's about all. I would imagine, however, that the "compleat >collector" would need to have one of these! Hi, thanks for the info, I am only slightly interested in it so its good to hear from someone who knows what he's talking about. > >Bill wrote: >> Is this RX as rare as the seller believes it is?? >> Http://cgi.ebay.co.uk/A-C-E-C-Model-R-278B-GR_W0QQitemZ584959 >>2218QQcatego >> ryZ4673QQrdZ1QQcmdZViewItem >> > -- Bill Article: 101229 of rec.radio.amateur.boatanchors From: kludge@panix.com (Scott Dorsey) Subject: Re: Collins R-278B Receiver Date: 2 Jan 2006 18:42:53 -0500 Message-ID: References: Bill wrote: > >Is this RX as rare as the seller believes it is?? Well, there were a lot of them made. But they aren't really very useful for anything, so you don't see a lot of them on the ham market. If you're into the UHF thing, there are plenty of better receivers out there, which for the most part don't fetch very much money. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." Article: 101230 of rec.radio.amateur.boatanchors From: Jim Yanik Subject: Re: Favorite Tektronix Scope Date: 3 Jan 2006 00:18:02 GMT Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> <1136224229.374708.216830@g43g2000cwa.googlegroups.com> "Too_Many_Tools" wrote in news:1136224229.374708.216830@g43g2000cwa.googlegroups.com: > Actually this raises the next question that I was going to ask...."What > is the easiest Tek scope to work on?" T921/22 or T932/35,hands down. No TEK-made ICs,simple switches,low parts count,all solid-state. (excluding CRT,of course) Easy to access all parts of the scope,better than any other TEK scope.. -- Jim Yanik jyanik at kua.net Article: 101231 of rec.radio.amateur.boatanchors From: Jim Yanik Subject: Re: Favorite Tektronix Scope Date: 3 Jan 2006 00:23:24 GMT Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> Rich Grise wrote in news:pan.2006.01.02.19.07.27.215209@example.net: > On Sun, 01 Jan 2006 12:49:22 -0800, Too_Many_Tools wrote: > >> I need to replace an oscilloscope that has gone to the Great Test Bench >> in the sky. >> >> What Tektronix scope do you prefer? >> >> I have always like the 7000 series...would you recommend these or >> another series? >> >> Thanks >> >> TMT > > If Tektronix scopes are still as good as I've always known them to be, > then the only consideration should be your budget. Then get the > toppest-of-the-line you can afford. > > Have Fun! > Rich > > > Just do not plan on repairing or calibrating them yourself. Their "service manuals" have NO component-level schematics or parts lists. Calibrations are done by PC-based software,and may call for test equipment you don't have. Power supplies are purchased-parts. The TDS scopes are engineered to be module-exchange repair only. -- Jim Yanik jyanik at kua.net Article: 101232 of rec.radio.amateur.boatanchors From: "Fred W4JLE" Subject: Collins 18 S-4 Date: Mon, 2 Jan 2006 19:46:16 -0500 Message-ID: <7af6b$43b9c98d$471d2513$30052@ALLTEL.NET> I am looking for a schematic for a Collins 18 S-4. It is apparently a 10 channel 100 Watt tranceiver that was used in aircraft. I have two of them that have had the dyno's removed. They look pretty hefty with an 813 modulated for AM by a pair of 811A's. They have a removable cover on the front to manually change channels. It is simply a rotary switch with a screwdriver slot. The only source I found wants $75.00 for a manual for what is probably a $10.00 radio. Thanks all Article: 101233 of rec.radio.amateur.boatanchors From: qrk Subject: Re: Favorite Tektronix Scope Message-ID: <29ijr15923pim2ih03vovp4rsr3mea6ihl@4ax.com> References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> Date: Tue, 03 Jan 2006 00:48:55 GMT On Sun, 01 Jan 2006 22:04:57 GMT, Ignoramus32654 wrote: >I will sell the 475 though, two scopes is too much. Don't you mean "not enough"? Two is sort of a minimum working level. 3 or 4 is nice to have! Can't beat the 465, 475, and 7000 series. Also use the 305x series when I need storage, math, or documenation. --- Mark Article: 101234 of rec.radio.amateur.boatanchors From: Jim Yanik Subject: Re: Favorite Tektronix Scope Date: 3 Jan 2006 00:33:48 GMT Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <53sgr1l9of9o6dgv5cq6i9gq1i5c9r6jfl@4ax.com> <43B98FF6.8080307@us.ibm.com> kludge@panix.com (Scott Dorsey) wrote in news:dpc915$do8$1@panix2.panix.com: > On the basic Tektronix thread, I still have this Tek 650HR with a > luminance problem. It appears to be the "PLRT INV & TRIG PICK-OFF" > chip, which is a Tektronix 155-0216-00. Earlier revisions used a > Tektronix 155-0032-00. > > Tek says support for the monitor (and probably for the rest of the > Group 26 products) was discontinued in 1996. They can't tell me what > the original manufacturer's part number is, or even who the original > manufacturer of the chip was, and the service manual lists only the > house number. 155-xxxx-xx and 234-xxxx-xx ICs were made **BY TEK**(they should have told you that),and they sold off the IC manufacturing unit to Maxim,who turned around and stopped making them,as TEK did not buy in the volumes Maxim wanted. NO other company makes those 155 or 234 prefixed ICs. > > Any Tek technicians happen to have some of these in the junk box, or > know what the real part number is? The input that takes the base > comparison voltage from the aperture pot is pulling the input way > down. --scott > > The one good thing is that the 155-0032-xx was used in a lot of TEK products.You can find them in 465's,IIRC,on the trigger PCB. Try Ebay,or search electronic salvage companies that sell used TEK products. I worked for TEK for 21.5 years as a service tech in their field offices,repairing and calibrating scopes,TM500,and TV test equipment. -- Jim Yanik jyanik at kua.net Article: 101235 of rec.radio.amateur.boatanchors From: john_c@tpg.com.au (John Crighton) Subject: Re: Favorite Tektronix Scope Date: Tue, 03 Jan 2006 00:55:30 GMT Message-ID: <43b9c718.18987073@free.teranews.com> References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> <06vir11bgn46e0vsjcveg3ub8oe8psqr14@4ax.com> On Mon, 02 Jan 2006 20:21:03 +0100, Paul Burridge wrote: >I came across this on the 'net, which may or may not be useful in your >particular case, John... Hello Paul, thanks very much for sharing those gems. I have stored them away. I had a good laugh at your dining room table centre piece admisssions and the follow up doily and scope cosy remarks. Heh Heh heh..... I must admit when I first got my 465 I just couldn't keep my hands off it and I had it covered up with a tea towel in between playing with it. When you have lusted after something for decades and you finally get it. Oh what a feeling! Regards, John Crighton Sydney Article: 101236 of rec.radio.amateur.boatanchors From: Ignoramus16356 Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <29ijr15923pim2ih03vovp4rsr3mea6ihl@4ax.com> Message-ID: Date: Tue, 03 Jan 2006 01:25:10 GMT On Tue, 03 Jan 2006 00:48:55 GMT, qrk wrote: > On Sun, 01 Jan 2006 22:04:57 GMT, Ignoramus32654 > wrote: > >>I will sell the 475 though, two scopes is too much. > > Don't you mean "not enough"? Two is sort of a minimum working level. 3 > or 4 is nice to have! Can't beat the 465, 475, and 7000 series. Also > use the 305x series when I need storage, math, or documenation. When would I need two scopes? What kind of practical situation? I am not desperate for money, but I am short of space. I am open minded regareing this issue. i Article: 101237 of rec.radio.amateur.boatanchors From: john_c@tpg.com.au (John Crighton) Subject: Re: Favorite Tektronix Scope Date: Tue, 03 Jan 2006 02:03:23 GMT Message-ID: <43b9cdbd.20688672@free.teranews.com> References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> On 2 Jan 2006 16:56:05 -0500, kludge@panix.com (Scott Dorsey) wrote: >John Crighton wrote: >> >>My 454 is "not easy" to work on and yet I see people >>saying that it is. I am just wondering if you are repeating >>what you have read on the internet supporting a Myth >>that the 454 is easy to work on or speaking from >>practical experience. > >Everything is relative. If you think the 454 is hard to work on, you should >just SEE the insides of the 7000. Likewise the 7000 is a whole lot easier >to work on than the latest generation of digital scopes. Yes I agree everything is relative. An easy to repair comment should be defined a bit better, perhaps against time or compared against something else say removing a hard drive from a home conputer. Half a dozen screws and the cover is off, Pull two connectors and remove two or four mounting screws and the hard drive is out. I would call that easy. A job that takes less that 15 minutes I would say is easy. >>I would like to clean the switch wafers of the main >>timebase switch. My 454 is put together like an onion. >>How do I "easily" gain access to this switch, >>which is buried in the heart of the onion? > >If the switch wafers really are bad, the easiest thing to do is to use >Cramolin with a very long spray tube. You can get it into very small >places without having to do as much dissasembly. But make sure the >contacts are tight, first. I must admit I have never come across Cramolin. I will ask around. If it is available in Sydney, I'll find it. > I don't see contact cleaning needed on >the scopes of this era, although some of the older ones did. >--scott Oh, I do! Going by the dates on the boards, I am guessing that my 454 was built around 1968 and has spent many years in someones backyard tin shed. The aluminium metal work is slightly pitted meaning it has been in a damp area. There was no filter for who knows how long, one or two decades maybe longer, so the insides are quite dusty. Two years shy of forty years of age and the scope still works. Bloody marvellous! Switches in that environment of damp and dust can't be expected to remain clean and reliable. I am just amazed that my 454 scope works as well as it does even with its dodgy switch. Regards, John Crighton Sydney Article: 101238 of rec.radio.amateur.boatanchors From: Ken Scharf Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> Message-ID: Date: Mon, 02 Jan 2006 21:26:08 -0500 John Crighton wrote: > On Sun, 01 Jan 2006 18:10:16 -0500, Ken Scharf > wrote: > > > >>I have a Tek 454 that I got at a company auction years back where >>I used to work (paid $150 for it). The 453,453A,454, 454A series >>are easy to work on, > > > > Hello Ken, > I also have a Tek 454. I bought that model > because I read on groups like this that it is "easy" > to work on. I must respectively disagree with you. > > My 454 is "not easy" to work on and yet I see people > saying that it is. I am just wondering if you are repeating > what you have read on the internet supporting a Myth > that the 454 is easy to work on or speaking from > practical experience. > > I would like to clean the switch wafers of the main > timebase switch. My 454 is put together like an onion. > How do I "easily" gain access to this switch, > which is buried in the heart of the onion? > > Slip the covers off your instrument, yes that is > very easy, a matter of seconds. Now have a look > and tell me how to clean the timebase switch? > How many hours would it take to remove the soldered > wiring off the boards so that they can be removed to > gain access to the switch and then solder the wires back > with nice factory quality solder joints, not with quick > blob soldering with insulation peeling back off the wires. > Quality work only. > > Several minutes work would be easy if there was > connectors on the boards but not in this scope. > When we talk about "hours" we are in a different > category......pain in the butt/difficult. > > How long would it take you, Ken, to clean the switch > from woa to go? Scope back up and working? > > How long would it take you to remove the fan, fan wiring > tag strips and fan mounting brackets? > How do you get your screw driver on the screws holding > the brackets when there are modules covering them up? > Just have a quick look then come back and tell me > if you still reckon this scope is easy to work on, in the > inner sanctums. > > Regards, > John Crighton > Sydney > My comment was based on what I have read. I have the service manual for the 454 and it is a well written book. The 454 is a a well designed scope, and parts are available. Fixing ANY high tech scope is NOT a job for the faint of heart, but at least the parts in the 454 are not so small (surface mount) that you need an electron microscope to see them! The older tube based tek's are what you want if you want to restore a scope yourself. However, if you want to buy a scope in working condition that you COULD fix yourself (OK substitute the word POSSIBLE for EASY) then the 45x series is about as "modern" as you want to go. Article: 101239 of rec.radio.amateur.boatanchors From: gary Subject: Re: BEWARE david munro keene ontario References: <1133390327.690101.281010@z14g2000cwz.googlegroups.com> <439CE06F.F9FFD34A@shaw.ca> Message-ID: Date: Tue, 03 Jan 2006 02:26:35 GMT I almost was a scam victim of this person also. I say almost because I sent my $123 International Money Order on October 23 for a transmitter that he was supposedly selling. Well last week my original letter came back with a sticker saying that I had used the incorrect address! Proof positive that it pays to screw up! Gary WA1EWQ N7ZZT - Eric Oyen wrote: > John Barnard wrote: > > > >>>Brian's Basement >>>http://webpages.charter.net/brianhill/6.htm >>> >>>Brian's Radio Universe >>>http://webpages.charter.net/brianhill/500.htm >> >>Is this the fall-up-the-stairs and then fall-down-the-stairs several times >>trip? If so, count me in! >> >>JB > > > hehehehe. I haven't heard that one since NYC! :) > Article: 101240 of rec.radio.amateur.boatanchors From: "YT" References: <7af6b$43b9c98d$471d2513$30052@ALLTEL.NET> Subject: Re: Collins 18 S-4 Message-ID: Date: Tue, 03 Jan 2006 04:14:16 GMT Fair Radio has repros "Fred W4JLE" wrote in message news:7af6b$43b9c98d$471d2513$30052@ALLTEL.NET... >I am looking for a schematic for a Collins 18 S-4. It is apparently a 10 > channel 100 Watt tranceiver that was used in aircraft. I have two of them > that have had the dyno's removed. They look pretty hefty with an 813 > modulated for AM by a pair of 811A's. They have a removable cover on the > front to manually change channels. It is simply a rotary switch with a > screwdriver slot. > > > The only source I found wants $75.00 for a manual for what is probably a > $10.00 radio. > > Thanks all > > Article: 101241 of rec.radio.amateur.boatanchors From: john_c@tpg.com.au (John Crighton) Subject: Re: Favorite Tektronix Scope Date: Tue, 03 Jan 2006 08:02:52 GMT Message-ID: <43ba2f95.45740294@free.teranews.com> References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> On Mon, 02 Jan 2006 21:26:08 -0500, Ken Scharf wrote: >John Crighton wrote: >> On Sun, 01 Jan 2006 18:10:16 -0500, Ken Scharf >> wrote: >> >> >> >>>I have a Tek 454 that I got at a company auction years back where >>>I used to work (paid $150 for it). The 453,453A,454, 454A series >>>are easy to work on, >> >> >> >> Hello Ken, >> I also have a Tek 454. I bought that model >> because I read on groups like this that it is "easy" >> to work on. I must respectively disagree with you. >> >> My 454 is "not easy" to work on and yet I see people >> saying that it is. I am just wondering if you are repeating >> what you have read on the internet supporting a Myth >> that the 454 is easy to work on or speaking from >> practical experience. >> >> I would like to clean the switch wafers of the main >> timebase switch. My 454 is put together like an onion. >> How do I "easily" gain access to this switch, >> which is buried in the heart of the onion? >> >> Slip the covers off your instrument, yes that is >> very easy, a matter of seconds. Now have a look >> and tell me how to clean the timebase switch? >> How many hours would it take to remove the soldered >> wiring off the boards so that they can be removed to >> gain access to the switch and then solder the wires back >> with nice factory quality solder joints, not with quick >> blob soldering with insulation peeling back off the wires. >> Quality work only. >> >> Several minutes work would be easy if there was >> connectors on the boards but not in this scope. >> When we talk about "hours" we are in a different >> category......pain in the butt/difficult. >> >> How long would it take you, Ken, to clean the switch >> from woa to go? Scope back up and working? >> >> How long would it take you to remove the fan, fan wiring >> tag strips and fan mounting brackets? >> How do you get your screw driver on the screws holding >> the brackets when there are modules covering them up? >> Just have a quick look then come back and tell me >> if you still reckon this scope is easy to work on, in the >> inner sanctums. >> >> Regards, >> John Crighton >> Sydney >My comment was based on what I have read. I have the service manual >for the 454 and it is a well written book. The 454 is a a well designed >scope, and parts are available. Ken, Remove the covers from your 454 scope and take a look >from the point of view of access to the inner assemblies. I wonder if you still say that it is well designed?. Deliberately threading bunches of wires (small loom) through round holes in brackets or sub panels is weird. Why not slot holes to the end of brackets/ sub assemblies/metal panels so that the cable loom or wires can be slipped out of the slot if a subassembly has to be moved. Threading wires through round holes in small bits of metalwork so that they are tied in, I don't like that sort of design. No thought for the non Tek trained serviceman. >Fixing ANY high tech scope is NOT a job >for the faint of heart, but at least the parts in the 454 are not >so small (surface mount) that you need an electron microscope to see them! Agreed. >The older tube based tek's are what you want if you want to restore a >scope yourself. However, if you want to buy a scope in working condition >that you COULD fix yourself (OK substitute the word POSSIBLE for EASY) then >the 45x series is about as "modern" as you want to go. I settled on the 465 myself. The first was a goer with problems. The little U shaped contacts that Bill Turner spoke off. The second was cosmetically very nice but dead. Shorted tantalum on the 15V suppluy. The third was partly robbed of bits. Even had an IC fitted back to front. All three are working nicely now. I enjoyed repairing them. You can get access to most of the 465s innermost parts. Not a nightmare like the the 454 and yet the 454 gets a great right up on many websites. I don't know why! Sorry Ken if I appeared to jump on you. In regard to the old tube monsters, I gave two of those away to another enthusiast. 533A and 549. Tubes cost a lot of money, I just could not afford to restore them but the other chap is dead keen to get them working. He has contacts in the US who will send him parcels of junk picked up from ham field days and trash and treasure markets. He has put in his list of wanted items to his friends. All good fun! Regards, John Crighton Sydney Article: 101242 of rec.radio.amateur.boatanchors From: James Sweet Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <29ijr15923pim2ih03vovp4rsr3mea6ihl@4ax.com> Message-ID: Date: Tue, 03 Jan 2006 08:17:23 GMT > > > I just tracked down an intermittent in my 2467B's CRT supply, a process > that would have been a lot tougher if I hadn't had both my 485 and 2430A > clipped to various points. Scopes are cheap these days... you want at > least three. > Scopes are cheap, however space is not, at least not here. I've got two scopes, a 465B and an ancient but beautiful condition 531A. I'd get rid of the 531A but I need to find a good home for it, it's in great shape and works perfectly. Article: 101243 of rec.radio.amateur.boatanchors From: David Stinson Subject: Re: Whats been done to these? - BC453, BC455 References: <1136108443.072721.227790@g47g2000cwa.googlegroups.com> Message-ID: Date: Tue, 03 Jan 2006 13:34:39 GMT Good Day, Andrew. I assume these are actual SCR-274N Army sets and not AN/ARC-5 or ARA (three different models, all usually and incorrectly lumped together as "ARC-5"). Unless these are uncommon sets- which would be black wrinkle and have a tag marked both "SIGNAL CORPS US ARMY" and "AIRCRAFT RADIO CORP," and have a contract of 1470-NY-41, then they sound too far gone for reasonable restoration efforts. Later version SCR-274N receivers in better shape are common. Examples with modest modifications that are easily reversed, such as the "standard" controls in the drawer, are much less expensive than unmolested sets. But if you prefer the challenge, you'll need a different manual. The AN/ARC-5 receivers are not wired the same as the earlier SCR-274N and the diagrams are not compatible. What does it say on the nomenclature tags of your sets? That will help with finding the right diagrams. 73 Dave AB5S p.s. If they are Aircraft Radio Corp. SCR-274N, they are worth a big restoration effort. Article: 101244 of rec.radio.amateur.boatanchors From: "Kevin G. Rhoads" Subject: Re: Favorite Tektronix Scope Date: Tue, 03 Jan 2006 13:13:12 +0000 Message-ID: <43BA7868.84231FFF@alum.mit.edu> References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> >That said, I still have a 545 on my bench at work. What plug-ins? Article: 101245 of rec.radio.amateur.boatanchors From: "al goss" Subject: WTB: Tubes: OB2 OA2 Message-ID: Date: Tue, 03 Jan 2006 14:10:34 GMT For Gonset 903 & 913 amps. 2 ea. OB2 1ea. OA2 or qty 4 & 2 respectively ok. Prefer to keep it original, are daily used amps.... tubes r for spare parts. al k2erg@arrl.net Article: 101246 of rec.radio.amateur.boatanchors From: Ignoramus29795 Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> <43ba2f95.45740294@free.teranews.com> Message-ID: Date: Tue, 03 Jan 2006 14:14:15 GMT Yep. A 2445 lets me do very nice things, like built in "caliper" kind of thing, triggering on selected signal, blah blah. It is a great all around scope for a dude like me. i Article: 101247 of rec.radio.amateur.boatanchors From: "swampop" Subject: F.S. Misc. Ham Gear Message-ID: Date: Tue, 3 Jan 2006 08:21:19 -0600 All Gear working last time tested unless noted. Shipping is extra. Please reply to my email address. Money Oders or Checks Ok. Will ship after Personal checks clear. Tempo-1: All Tube Ham Transceiver with Power Supply. Covers 80-10 meters. Looks good and works well. $150 Pearce Simpson: Guardian 23- All tube CB Transceiver/with mobile power cord and mounting bracket. Looks and works Good. $100 Swan 14X DC Power Supply Module: No way to test but was told it was working OK. As is $45. Siltronix Model 90-6 VFO: Excellent condition with three position crystal switch $60. Marantz Model 2220B: Stereophonic Receiver, with gyro-touch tuning, blue dial and optional real wood case. This unit is in excellent condition, both in looks and operation. I would rate a 9.7. Also have original manual, in excellent condition. $200 Channel Master: Tube Stereo Receiver (Model 6612) and matching amp (Model 6601) Looks good and plays on FM only. AM not working. $50 Traynor: Group Two B- Audio Amp Head. High/ Low misc. in puts. Master volume, volume, bass, treble and tone shaper controls. All solid state $100 PRO 2003 Scanner: Radio Shack 50 channel( 30-512 Mhz.) Digital Scanner with FM broadcast band included. Have two, one is working the other is a complete non working unit. $75 for both. Bearcat 250 Scanner: Have two. One working at times and one for parts. $35 for both. RS Pro 30 Scanner: Hand held 16 channel Digital scanner. Looks & Works good, but the battery cover plate is missing $20. HTX-202: Radio Shack 2 Meter HT. Works good. Slightly chipped where the battery slides in, but does not affect operation. No nicad or antenna, but I will include the AA Battery pack with the unit. $80 Thanks Article: 101248 of rec.radio.amateur.boatanchors From: szekeres@pitt.edu (GregS) Subject: Re: Favorite Tektronix Scope Date: Tue, 03 Jan 2006 16:48:52 GMT Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> <43b9cdbd.20688672@free.teranews.com> <1136301771.166855.147160@g14g2000cwa.googlegroups.com> In article <1136301771.166855.147160@g14g2000cwa.googlegroups.com>, mkim54@aol.com wrote: >I use DeoxIT, works better and comes in a variety of applicators. In >Sydney you can get it from http://www.caprina.com.au/catp.html or see >Caig website for info and other locations, www.caig.com. >I use the deoxIT D5 and DN5 and their proGold products. Great stuff. >Mike I worked on an old Nicolet The switches were terrible, most all of them. I spent weeks trying to clean all the switches, mostly the rotary ones. I had to use all my toughest cleaners. The hardest part was getting into the partly sealed switches. I used my best cleaners, alcohol, Contaclean, Alcohol-Cramolin, Bufffrog cleaner. Over and over. I didn't use Deoxit, because I ran out. Cramolin is no longer sold as Cramolin. Its called Contaclean by the Cramolin Co. a German company. Available from InOne, Farnell. >John Crighton wrote: >> On 2 Jan 2006 16:56:05 -0500, kludge@panix.com (Scott Dorsey) wrote: >> >> >John Crighton wrote: >> >> >> >>My 454 is "not easy" to work on and yet I see people >> >>saying that it is. I am just wondering if you are repeating >> >>what you have read on the internet supporting a Myth >> >>that the 454 is easy to work on or speaking from >> >>practical experience. >> > >> >Everything is relative. If you think the 454 is hard to work on, you should >> >just SEE the insides of the 7000. Likewise the 7000 is a whole lot easier >> >to work on than the latest generation of digital scopes. >> >> Yes I agree everything is relative. An easy to repair >> comment should be defined a bit better, perhaps >> against time or compared against something else >> say removing a hard drive from a home conputer. >> Half a dozen screws and the cover is off, >> Pull two connectors and remove two or four >> mounting screws and the hard drive is out. >> I would call that easy. >> A job that takes less that 15 minutes I would say is easy. >> >> >> >> >>I would like to clean the switch wafers of the main >> >>timebase switch. My 454 is put together like an onion. >> >>How do I "easily" gain access to this switch, >> >>which is buried in the heart of the onion? >> > >> >If the switch wafers really are bad, the easiest thing to do is to use >> >Cramolin with a very long spray tube. You can get it into very small >> >places without having to do as much dissasembly. But make sure the >> >contacts are tight, first. >> >> I must admit I have never come across Cramolin. I will >> ask around. If it is available in Sydney, I'll find it. >> >> >> > I don't see contact cleaning needed on >> >the scopes of this era, although some of the older ones did. >> >--scott >> >> Oh, I do! >> Going by the dates on the boards, I am guessing that >> my 454 was built around 1968 and has spent many >> years in someones backyard tin shed. The aluminium >> metal work is slightly pitted meaning it has been in a >> damp area. There was no filter for who knows how long, >> one or two decades maybe longer, so the insides are >> quite dusty. >> >> Two years shy of forty years of age and the scope still >> works. Bloody marvellous! Switches in that environment >> of damp and dust can't be expected to remain clean and >> reliable. I am just amazed that my 454 scope works as well >> as it does even with its dodgy switch. >> >> Regards, >> John Crighton >> Sydney > Article: 101249 of rec.radio.amateur.boatanchors From: Diamond Dave Subject: Re: BEWARE david munro keene ontario Date: Tue, 03 Jan 2006 10:51:40 -0700 Message-ID: References: <1133390327.690101.281010@z14g2000cwz.googlegroups.com> <439CE06F.F9FFD34A@shaw.ca> On Tue, 03 Jan 2006 02:26:35 GMT, gary wrote: >I almost was a scam victim of this person also. I say almost because I >sent my $123 International Money Order on October 23 for a transmitter >that he was supposedly selling. Where did you first see his for sale post? Here, eBay, another forum? What name did he use in the ad? Article: 101250 of rec.radio.amateur.boatanchors From: "n9zle" References: <1135600938.611391.52440@o13g2000cwo.googlegroups.com> Subject: Re: No link attitude! Message-ID: Date: Wed, 28 Dec 2005 05:19:06 GMT And Happy new years! http://www.n9zle.com/forum "Jornada680e" wrote in message news:1135600938.611391.52440@o13g2000cwo.googlegroups.com... > Merry Christmas. > Article: 101251 of rec.radio.amateur.boatanchors From: kludge@panix.com (Scott Dorsey) Subject: Re: Favorite Tektronix Scope Date: 3 Jan 2006 13:54:39 -0500 Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <29ijr15923pim2ih03vovp4rsr3mea6ihl@4ax.com> Ignoramus16356 wrote: >On Tue, 03 Jan 2006 00:48:55 GMT, qrk wrote: >> On Sun, 01 Jan 2006 22:04:57 GMT, Ignoramus32654 >> wrote: >> >>>I will sell the 475 though, two scopes is too much. >> >> Don't you mean "not enough"? Two is sort of a minimum working level. 3 >> or 4 is nice to have! Can't beat the 465, 475, and 7000 series. Also >> use the 305x series when I need storage, math, or documenation. > >When would I need two scopes? What kind of practical situation? I am >not desperate for money, but I am short of space. I am open minded >regareing this issue. When one of your scopes breaks. How will you fix it, without a second scope? --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." Article: 101252 of rec.radio.amateur.boatanchors Subject: Re: a couple newbie questions about the Yaesu FRG-7 ? From: "Dave" References: Date: Tue, 3 Jan 2006 19:01:32 GMT Message-ID: <43baca87$0$29072$a82e6bb9@orc.meganetnews.com> Hi Arlen, The resistors might possible be for a battery discharge for NiCads - I once had a switch to fully drain batteries in a radio before recharging them - NiCads were fussy about that. Your resistor values sound about right as a 'drain' for Nicads. Regarding your Frequency counter, I don't believe you can tap in and get anything but a local oscillator readout. Not sure what the IF in a FRG-7 is, but that's what your meter will read. Someone makes a digital add-on for receivers that adds difference back in so you're reading the actual frequency, not the local oscillator. I may be wrong on an FRG as they use a funky tuning system that may have the fundamental available as an oscillator but I really can't say for sure. Dave Article: 101253 of rec.radio.amateur.boatanchors From: Paul Burridge Subject: Re: Favorite Tektronix Scope Date: Tue, 03 Jan 2006 20:53:01 +0100 Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <29ijr15923pim2ih03vovp4rsr3mea6ihl@4ax.com> On Tue, 03 Jan 2006 01:25:10 GMT, Ignoramus16356 wrote: >When would I need two scopes? What kind of practical situation? I am >not desperate for money, but I am short of space. I am open minded >regareing this issue. If you part with that 475, then sooner or later you'll be very, very, very sorry. -- "What is now proved was once only imagin'd" - William Blake Article: 101254 of rec.radio.amateur.boatanchors From: Ignoramus29795 Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <29ijr15923pim2ih03vovp4rsr3mea6ihl@4ax.com> Message-ID: Date: Tue, 03 Jan 2006 21:03:29 GMT On Tue, 03 Jan 2006 20:53:01 +0100, Paul Burridge wrote: > On Tue, 03 Jan 2006 01:25:10 GMT, Ignoramus16356 > wrote: > > >>When would I need two scopes? What kind of practical situation? I am >>not desperate for money, but I am short of space. I am open minded >>regareing this issue. > > If you part with that 475, then sooner or later you'll be very, very, > very sorry. I changed my mind. I will not sell my 475. Now... I have little interest in homemade radio or audio stuff. So far my little forays into electronics centered around power electronics. Given that... Is there any possible reason to keep a spectrum analyzer? i Article: 101255 of rec.radio.amateur.boatanchors From: "Richard Henry" Subject: Re: Favorite Tektronix Scope Date: Tue, 3 Jan 2006 13:08:44 -0800 Message-ID: <4207ftF1gkspgU1@individual.net> References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <29ijr15923pim2ih03vovp4rsr3mea6ihl@4ax.com> "Ignoramus29795" wrote in message news:BEBuf.1497$1_1.725@fe67.usenetserver.com... > On Tue, 03 Jan 2006 20:53:01 +0100, Paul Burridge wrote: > > On Tue, 03 Jan 2006 01:25:10 GMT, Ignoramus16356 > > wrote: > > > > > >>When would I need two scopes? What kind of practical situation? I am > >>not desperate for money, but I am short of space. I am open minded > >>regareing this issue. > > > > If you part with that 475, then sooner or later you'll be very, very, > > very sorry. > > I changed my mind. I will not sell my 475. > > Now... I have little interest in homemade radio or audio stuff. So far > my little forays into electronics centered around power electronics. > Given that... Is there any possible reason to keep a spectrum > analyzer? Emissions compliance testing. Article: 101256 of rec.radio.amateur.boatanchors From: novatech@eskimo.com (Steven Swift) Subject: Re: Favorite Tektronix Scope Date: 3 Jan 2006 21:46:03 GMT Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <1136160323.896346.250500@z14g2000cwz.googlegroups.com> "John-Del" writes: >I have used a 7603 for about 15 years for general troubleshooting, and >it's my favorite scope. It's rock solid, and bright and sharp. I >haven't been able to find a horiz plug-in with TV sync, but the trigger >is so good I can get it to lock on video anyway. Only problems are the >huge Mallory capacitors in the power supply that will open without >warning. Replace all of these and you'll have no trouble at all. >John The 7603 is very nice. I use them for the spectrum analyser plug-ins as the bigger CRT helps. But for normal trouble shooting, I much prefer the 7704A as the basic scope. The same plugins work, but you get a bit more bandwidth-- up to 200MHz and the fourth slot lets you do some interesting things with delaying timebases. For smaller units, I prefer the 475. Nice and solid. To complement the Tek 3052B digital scopes, I use 7904 with high speed plugins (like 7A19 and 7B92). The 7904 is the stand for the 3052B. I use SC502 and SC504 in the TM500 racks when I want to watch something on the bench without taking up space. Steve -- Steven D. Swift, novatech@eskimo.com, http://www.novatech-instr.com NOVATECH INSTRUMENTS, INC. P.O. Box 55997 206.301.8986, fax 206.363.4367 Seattle, Washington 98155 USA Article: 101257 of rec.radio.amateur.boatanchors From: Barry OGrady Subject: Re: Whats been done to these? - BC453, BC455 Date: Wed, 04 Jan 2006 10:19:54 +1100 Message-ID: <3j1mr150o386hd8i9g1uq81a0h1hvhcggo@4ax.com> References: <1136108443.072721.227790@g47g2000cwa.googlegroups.com> On Tue, 03 Jan 2006 13:34:39 GMT, David Stinson wrote: >Good Day, Andrew. >I assume these are actual SCR-274N Army sets >and not AN/ARC-5 or ARA (three different models, all usually >and incorrectly lumped together as "ARC-5"). >Unless these are uncommon sets- which would be black wrinkle >and have a tag marked both "SIGNAL CORPS US ARMY" and >"AIRCRAFT RADIO CORP," and have a contract of 1470-NY-41, >then they sound too far gone >for reasonable restoration efforts. Later version >SCR-274N receivers in better shape are common. >Examples with modest modifications that are easily >reversed, such as the "standard" controls in the drawer, >are much less expensive than unmolested sets. >But if you prefer the challenge, you'll need a different >manual. The AN/ARC-5 receivers are not wired the same >as the earlier SCR-274N and the diagrams are not compatible. >What does it say on the nomenclature tags of your sets? >That will help with finding the right diagrams. I have a BC-454 and a BC-453 in unpainted aluminum. What are they worth? >73 Dave AB5S > >p.s. If they are Aircraft Radio Corp. SCR-274N, they >are worth a big restoration effort. Barry ===== Home page http://members.iinet.net.au/~barry.og Article: 101258 of rec.radio.amateur.boatanchors Message-ID: <43BB212E.E574999A@wrenchman.com> From: Noone Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> <06vir11bgn46e0vsjcveg3ub8oe8psqr14@4ax.com> <43b9c718.18987073@free.teranews.com> Date: Wed, 04 Jan 2006 01:11:53 GMT John Crighton wrote: > On Mon, 02 Jan 2006 20:21:03 +0100, Paul Burridge > wrote: > > >I came across this on the 'net, which may or may not be useful in your > >particular case, John... > > Hello Paul, > thanks very much for sharing those gems. > I have stored them away. > > I had a good laugh at your dining room table > centre piece admisssions and the follow up doily > and scope cosy remarks. Heh Heh heh..... > > I must admit when I first got my 465 I just couldn't > keep my hands off it and I had it covered up with > a tea towel in between playing with it. > > When you have lusted after something for decades > and you finally get it. Oh what a feeling! > > Regards, > John Crighton > Sydney Now in my mid 50's, I am reminded of something my father said. He had always said, that ever since 1957 , he wanted a Cadillac. In the later years of his life, hefinally got his wish - he bought a 1957 Cadillac. For years I have been collecting and restoring the iconic untouchables of my early days in Engineering. Scopes are like boats, you can never have too many. But they are useful. My particular weakness has been the HP 141T family of Spectrum Analyzers. What was 20K + then, is now cheap. Winter nights are spent re-Cap-ing, calibrating, and restoring these remnants of the last great Analog Spectrum Analyzer. Like restoring the automobiles of one's youth, these are tangible links to our own past. Any good tool, kept in working condition is valuable. To see these Cadillacs of the past brought back to their former glory is reward enough. As John said so well, Oh what a feeling! Blakely Blakely LaCroix Minneapolis, Minnesota. USA Article: 101259 of rec.radio.amateur.boatanchors From: qrk Subject: Re: Favorite Tektronix Scope Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <29ijr15923pim2ih03vovp4rsr3mea6ihl@4ax.com> Date: Wed, 04 Jan 2006 02:08:42 GMT On Tue, 03 Jan 2006 01:25:10 GMT, Ignoramus16356 wrote: >On Tue, 03 Jan 2006 00:48:55 GMT, qrk wrote: >> On Sun, 01 Jan 2006 22:04:57 GMT, Ignoramus32654 >> wrote: >> >>>I will sell the 475 though, two scopes is too much. >> >> Don't you mean "not enough"? Two is sort of a minimum working level. 3 >> or 4 is nice to have! Can't beat the 465, 475, and 7000 series. Also >> use the 305x series when I need storage, math, or documenation. > >When would I need two scopes? What kind of practical situation? I am >not desperate for money, but I am short of space. I am open minded >regareing this issue. > >i 1. As others have said, when you need to fix your other scope. My 465 just took a dump a couple weeks ago. Used the 475 to troubleshoot it. One of the HV ceramic caps has excess leakage :( At least it's a replaceable part. 2. It's also nice to have a spare when the other scope goes down. 3. Sometimes you just need two scopes to do the job, especially when your project is divided up between two racks of equipment. 4. Sometimes you need multiple scopes because your events are asynchronous. 5. Some scopes are better at doing certain tasks like those nifty microchannel plate intensified scopes. 6. Sometimes you have multiple projects going and it's nice not having to disassemble your test setup. 7. You may have a 7000 mainframe, but need a portable scope like the 465. 8. It's also nice to have a modern digital scope for slow events, math functions, and documentation. But, keep those analog scopes around as they convey more information about the signal at a glance than any digital scope I've used. You also mentioned something about spectrum analyzers. Extremely handy for certain types of work. Depending on the anlyzer, they are great for characterizing filters, amplifiers, noise in low-level amplifiers, EMI issues, unwanted oscillations, impedance, and a host of other things. --- Mark Article: 101260 of rec.radio.amateur.boatanchors From: "Robert G. Carter" Subject: FS: HP-608E/F OPERATING & SERVICE MANUAL Date: Tue, 3 Jan 2006 21:34:58 -0500 Message-ID: <11rmd2jmbvj3ga0@corp.supernews.com> HEWLETT PACKARD Operating & Service Manual For Sale Type Equipment: Model 608E/F VHF Signal Generator For Serial #s: 833-02720 & subsequent (608E) 832-01500 & subsequent (608F) Manual Number: 00608-90024 Manual Date: FEB 1970 Condition: Excellent, original manual complete with errata sheets, used little if any, slight blemishes on front cover. Price: $30 includes shipping via USPS to US addressees in the lower 48 states. Pay By: U.S. Postal Money Order Delivered Via: U.S. Mail Return Policy: No returns on this item. Other terms and conditions: Sale to US addressees only. Principals only - no third-party arrangements entertained. Contact: Bob Carter, W5BTC, dc2light@radix.net Article: 101261 of rec.radio.amateur.boatanchors From: gary Subject: Re: BEWARE david munro keene ontario References: <1133390327.690101.281010@z14g2000cwz.googlegroups.com> <439CE06F.F9FFD34A@shaw.ca> Message-ID: Date: Wed, 04 Jan 2006 03:56:31 GMT September 23 2005. REC.HAM-RADIO.SWAP. He used David Munro. Diamond Dave wrote: > On Tue, 03 Jan 2006 02:26:35 GMT, gary wrote: > >>I almost was a scam victim of this person also. I say almost because I >>sent my $123 International Money Order on October 23 for a transmitter >>that he was supposedly selling. > > > Where did you first see his for sale post? Here, eBay, another forum? > What name did he use in the ad? Article: 101262 of rec.radio.amateur.boatanchors From: ve3ab@personainternet.com (Earl Andrews) Subject: CQ the fellow who bought my TMC rcvr..I found the coil/transformer Date: Wed, 04 Jan 2006 04:13:23 GMT Message-ID: <43bb4aa8.882051398@news.personainternet.com> Looking for the chap who came across the US border at Sault Ste Marie MI/Ontario and bought my TMC GPR 90 Rcvr. I found what might be the missing coil/If transformer ..that was the problem with that radio. Also..I have a manual that I came across for it as well. email me at ve3ab@rac.ca ( I can photograph the coil and send a digital picture to you). 73 Earl VE3AB Article: 101263 of rec.radio.amateur.boatanchors From: "Heytubeguy" Subject: NEED EICO 1030 info Message-ID: Date: Wed, 04 Jan 2006 14:03:52 GMT Can anyone tell the correct size of the fuse for the Eico 1030? Tnx Heytubeguy Article: 101264 of rec.radio.amateur.boatanchors From: Andy Cowley Subject: Re: Cold storage: Solid state VS. Tube Message-ID: References: <1135210508.438440.135950@g47g2000cwa.googlegroups.com> Date: Wed, 4 Jan 2006 14:18:36 GMT nc183d@aol.com wrote: > When using a cold storage site, will Solid State sets (circa 1980) hold > up better than Vacuum Tube sets (circa 1930-1950) ? > Anyone had experience with this sort of thing? > rgds, > Mark S. > If the tube stuff is working then my experience is that the 80s electrolytics in the SS stuff will die long before those older ones in the tube stuff. best Andy Article: 101265 of rec.radio.amateur.boatanchors Message-ID: <43BBE16F.24D75A5@nospammers.com> From: Rube Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> Date: Wed, 04 Jan 2006 14:53:37 GMT Hi Caig has DeOxit in 5% and 100% formula, the 5% works most of the time. You can get it in standard aerosol (hazmat ship fee ups) or the pump can D5P (no hazmat fees) www.caig.com www.mcmelectronics.com has it in stock > > If the switch wafers really are bad, the easiest thing to do is to use > Cramolin with a very long spray tube. You can get it into very small > places without having to do as much dissasembly. But make sure the > contacts are tight, first. I don't see contact cleaning needed on > the scopes of this era, although some of the older ones did. > --scott Article: 101266 of rec.radio.amateur.boatanchors Message-ID: <43BBE1F1.50AA4F92@nospammers.com> From: Rube Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> Date: Wed, 04 Jan 2006 14:55:47 GMT DeOxit is standard issue for Xerox service staff, our service lady told me about it, she is also a amateur radio operator like me. Article: 101267 of rec.radio.amateur.boatanchors From: "Charlie Hugg" Subject: FS FT-102 Accessories Message-ID: Date: Wed, 4 Jan 2006 12:33:46 -0600 For Sale: Yaesu SP-102P speaker/phone patch for FT-102. Front Panel is perfect. Cabinet in very nice. Has a small ding on back edge of cabinet. Overall, looks and works great. Digital pictures available. Price is $85 plus shipping. I also have a brand new Yaesu XF-455C CW Filter for the Yaesu FT-102 Transceiver. It is No. 04-Y. Price is $65. Thanks, Charlie Hugg Article: 101268 of rec.radio.amateur.boatanchors From: Arlen Kerbaugh Subject: a couple newbie questions about the Yaesu FRG-7 ? Message-ID: Date: Tue, 03 Jan 2006 08:29:52 GMT I am new to this hobby and have acquired a beautifully cared for FRG-7. It is externally stock but has the Gilfer MOD-1 kit and a Collins 2.1 kHz mechanical filter installed and documented professionally. Question 1: Inside the internal battery bay is a slide switch with a couple large resistors (15 & 5.6 ohm) on it. What might this be used for? It looks original to me but I suppose it could be from one of the mods. BTW, this radio has never had a battery in it. Question 2: Does anyone know where I should tap into with my Tek freq counter to look at a digital output that would correspond to the dial readings on the front? I have downloaded the schematic but am not very radio savvy yet. A little background: I've just retired from 20+ years as an avionics technician, but, unfortunately, most of my expertise is in radar. Waveguides in place of wires. I've run many aircraft radios across test stations but that didn't help me much (some though) with the theory behind them. I am in full-bore research mode right now concerning radios and have so much to learn (I've been mostly lost in all the different antennas out there). I'm pretty anal and have been spoiled by mil spec so who knows where this will take me. Is this the best newsgroup for this type of posting or am I off base here? I know the FRG-7 doesn't have tubes but it is analog. What determines a boatanchor? Best regards, Arlen Article: 101269 of rec.radio.amateur.boatanchors Message-ID: <43BCB1D1.4020800@worldnet.att.net> From: Atsunori Tamagawa Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> <43b9cdbd.20688672@free.teranews.com> Date: Thu, 05 Jan 2006 05:42:45 GMT John Crighton wrote: > > Half a dozen screws and the cover is off, > Pull two connectors and remove two or four > mounting screws and the hard drive is out. > I would call that easy. I own some scopes. Though, my favorite is not one of Tek ones, but HP-1741A storage scope. Anyway, I realized that when I troubleshoot my scopes or fix something with them, I always got extra screws left. It is a bit annoying experience because I know those extra screw were being used somewhere. I think that test equipment are made of way too many extra screws. > Two years shy of forty years of age and the scope still > works. Bloody marvellous! It's probably a matter of total operating time instead of how old it is. I heard a story from an old analog engineer saying that when storage scopes were new, they were SO EXPENSIVE that you just couldn't keep them turned on, but only when you need to take a vital measurement you were allowed to turn it on. If that is true, I think some old storage scopes are actually bargains instead of to-be-avoied. Switches in that environment > of damp and dust can't be expected to remain clean and > reliable. I am just amazed that my 454 scope works as well > as it does even with its dodgy switch. I owned one 454, and later used one 454A. The 454 seemed to comsume much more power than 454A. In winter, having the 454 closer was nice. Atsunori Article: 101270 of rec.radio.amateur.boatanchors From: "Richard Henry" Subject: Re: Favorite Tektronix Scope Date: Thu, 5 Jan 2006 07:48:52 -0800 Message-ID: <424tgaF1h9oseU1@individual.net> References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> <43b9cdbd.20688672@free.teranews.com> <43BCB1D1.4020800@worldnet.att.net> "Chuck Harris" wrote in message news:v4edneO2SYsvtCDenZ2dnUVZ_tqdnZ2d@rcn.net... > Atsunori Tamagawa wrote: > > > I own some scopes. Though, my favorite is not one of Tek ones, > > but HP-1741A storage scope. > > Hmmm? I cannot imagine what you like about the 1741A, but different > strokes for different folks. > > Be very careful with that grey horizontal timing switch knob. HP cut two > (or was it 3?) slots that each cover 175 (115?) degrees through the body of the knob. > They did that so that you could see the light mounted on the panel through > the knob. Well, when the switch's lubrication gets a little sticky, > and you get a little enthusiastic (and lord knows the plastic is already > at least 18 years old), you will snap those thin little bits of plastic, > and your knob will be gone, and your scope will be unusable. Forget about > gluing it, as there was barely enough strength with the virgin plastic. > > We had dozens of that family of HP scope, and they all went into scrap because > the knobs were unavailable. > > Tektronix did the same thing with their horizontal knobs, but they > knew enough about materials engineering to make the body of the knob > out of aluminum, and make the grip surface of the knob out of plastic. I never had a HP scope that I liked, or would use unless there was no Tek scope available. Article: 101271 of rec.radio.amateur.boatanchors From: Edward Knobloch Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> Message-ID: Date: Thu, 05 Jan 2006 17:28:24 GMT Hi, I am enjoying this thread a lot. One nice feature of the 7603 is that you can substitute a "delaying" or "delayed" sweep plug-in (7B80 or 7B85), normally used in a 7804 400MHz four-slot instrument, for the 7B53 normally found in a 7603. I tried this once in an emergency, and tended to leave the 7B80 in the 7603 afterwards. The triggering seems a bit more stable using a 7B80 or 7B85, and usually I don't need a dual time base. 73, Ed Knobloch Article: 101272 of rec.radio.amateur.boatanchors Message-ID: <43BDB11D.40F42684@earthlink.net> From: "Michael A. Terrell" Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> <43b9cdbd.20688672@free.teranews.com> <43BCB1D1.4020800@worldnet.att.net> <424tgaF1h9oseU1@individual.net> Date: Thu, 05 Jan 2006 23:52:41 GMT Richard Henry wrote: > > I never had a HP scope that I liked, or would use unless there was no Tek > scope available. Microdyne had shelves full of HP scopes, but most of the techs would grab one of the beat up Leader 508A scopes. -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida Article: 101273 of rec.radio.amateur.boatanchors From: "Heytubeguy" Subject: FA: MORE AIR VARIABLES + STUFF Message-ID: <%yjvf.228461$qk4.134593@bgtnsc05-news.ops.worldnet.att.net> Date: Fri, 06 Jan 2006 01:17:47 GMT I will be listing ~35-45 air variables in the next month in addition to = ones already listed on Ebay. So, pse check back frequently. Trying to = clean out stuff. Some new ones are listed now and the mostly used ones = (receive & transmit) will be added a few each day or every other day. = Tnx for stopping by: http://search.ebay.com/_W0QQfgtpZ1QQfrppZ25QQsassZheytubeguy 73 Joe, heytubeguy Article: 101274 of rec.radio.amateur.boatanchors From: " Ron in Radio Heaven" Subject: CB-87 foot needed Message-ID: Date: Fri, 06 Jan 2006 02:33:17 GMT The Clough-Brengle model 87 transmitter project is on the home stretch. It is missing one rubber foot, here is a link to the CB-87 project, parts needed page. http://radioheaven.homestead.com/CBparts.html Page down a little and you'll see the photos and details about the foot needed. I've got one more knob for the front panel that needs to be cleaned and polished. And then figure out what I'm going to do about the missing tuning instruction that go in the holder on the front. I know from the 2 CCC radio operators that it had printed instructions for dial settings and the Clough-Brengle name. But I have no idea what it really looked like. A month or so ago I got a really nice SW-3 to go with it the recreate the CCC station shown on the opening CB-87 page. Thanks to everyone for their help and encouragement. 73, Ron Article: 101275 of rec.radio.amateur.boatanchors From: "Mark Moulding" References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> <43b9cdbd.20688672@free.teranews.com> <43BCB1D1.4020800@worldnet.att.net> <424tgaF1h9oseU1@individual.net> Subject: Re: Favorite Tektronix Scope Message-ID: Date: Fri, 06 Jan 2006 03:02:39 GMT I've had a 545 (military version), and it was quite good, although it had some calibration issues that I never really got resolved. Most of the time, though, I just used my 475, up until a couple of years ago. I got rid of the 454 (space reasons), and picked up an HP 54201D digital scope with logic analyzer-type triggering. Although I haven't needed the fancy triggering yet (though it would have been really helpful a couple of times in the past), the scope itself has now become my main scope. It's good to 300MHz (though I rarely need anything that fast), and I find I'm using the on-screen measurement capabilities and storage abilities quite a lot. Of course, the 475 is still sitting right on top, and in fact I used it to fix a faulty input channel in the 54201D when I first bought it. But really, the 475 rarely gets turned on now. Oh - the best part was that the 54201D only cost me $50 at a Ham swap meet... -- Mark "I prefer heaven for climate, hell for company." "Richard Henry" wrote in message news:424tgaF1h9oseU1@individual.net... > > "Chuck Harris" wrote in message > news:v4edneO2SYsvtCDenZ2dnUVZ_tqdnZ2d@rcn.net... >> Atsunori Tamagawa wrote: >> >> > I own some scopes. Though, my favorite is not one of Tek ones, >> > but HP-1741A storage scope. >> >> Hmmm? I cannot imagine what you like about the 1741A, but different >> strokes for different folks. >> >> Be very careful with that grey horizontal timing switch knob. HP cut two >> (or was it 3?) slots that each cover 175 (115?) degrees through the body > of the knob. >> They did that so that you could see the light mounted on the panel >> through >> the knob. Well, when the switch's lubrication gets a little sticky, >> and you get a little enthusiastic (and lord knows the plastic is already >> at least 18 years old), you will snap those thin little bits of plastic, >> and your knob will be gone, and your scope will be unusable. Forget >> about >> gluing it, as there was barely enough strength with the virgin plastic. >> >> We had dozens of that family of HP scope, and they all went into scrap > because >> the knobs were unavailable. >> >> Tektronix did the same thing with their horizontal knobs, but they >> knew enough about materials engineering to make the body of the knob >> out of aluminum, and make the grip surface of the knob out of plastic. > > I never had a HP scope that I liked, or would use unless there was no Tek > scope available. > > Article: 101276 of rec.radio.amateur.boatanchors From: "Mark Moulding" References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> <43b9cdbd.20688672@free.teranews.com> <43BCB1D1.4020800@worldnet.att.net> <424tgaF1h9oseU1@individual.net> Subject: Re: Favorite Tektronix Scope Message-ID: Date: Fri, 06 Jan 2006 03:08:59 GMT Oh, and servicing the HP 54201D scope was pretty easy. It came apart in obvious ways, and the boards were big, double-sided (not multi-layer), and gold plated. There were a couple of scary-looking custom IC's, but the problem in my case was just a burned-up 100 ohm resistor. I eventually bought (rented and copied, actually) the operator and service manuals for it, from W J Ford, who were quite easy to deal with and had a *really* large stock of old manuals. -- Mark "I prefer heaven for climate, hell for company." Article: 101277 of rec.radio.amateur.boatanchors From: Don Lancaster Subject: Re: Favorite Tektronix Scope Date: Thu, 05 Jan 2006 22:38:35 -0700 Message-ID: <426e2rF1gra3aU1@individual.net> References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> <43b9cdbd.20688672@free.teranews.com> <43BCB1D1.4020800@worldnet.att.net> <424tgaF1h9oseU1@individual.net> <43BDB11D.40F42684@earthlink.net> Michael A. Terrell wrote: > Richard Henry wrote: > >>I never had a HP scope that I liked, or would use unless there was no Tek >>scope available. > The HP 130C was an excellent oscilloscope. It has been stadily downhill from there. -- Many thanks, Don Lancaster voice phone: (928)428-4073 Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552 rss: http://www.tinaja.com/whtnu.xml email: don@tinaja.com Please visit my GURU's LAIR web site at http://www.tinaja.com Article: 101278 of rec.radio.amateur.boatanchors From: James Sweet Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> <43b9cdbd.20688672@free.teranews.com> <43BCB1D1.4020800@worldnet.att.net> Message-ID: <%Invf.20506$If.14477@trnddc05> Date: Fri, 06 Jan 2006 06:01:31 GMT Chuck Harris wrote: > Atsunori Tamagawa wrote: > >> I own some scopes. Though, my favorite is not one of Tek ones, >> but HP-1741A storage scope. > > > Hmmm? I cannot imagine what you like about the 1741A, but different > strokes for different folks. > > Be very careful with that grey horizontal timing switch knob. HP cut two > (or was it 3?) slots that each cover 175 (115?) degrees through the body > of the knob. > They did that so that you could see the light mounted on the panel through > the knob. Well, when the switch's lubrication gets a little sticky, > and you get a little enthusiastic (and lord knows the plastic is already > at least 18 years old), you will snap those thin little bits of plastic, > and your knob will be gone, and your scope will be unusable. Forget about > gluing it, as there was barely enough strength with the virgin plastic. > > We had dozens of that family of HP scope, and they all went into scrap > because > the knobs were unavailable. > Scrap? Surely a machinist could make a suitable replacement knob for less than the value of a good scope. Article: 101279 of rec.radio.amateur.boatanchors From: Rich Grise Subject: Re: Favorite Tektronix Scope Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> <43b9cdbd.20688672@free.teranews.com> <43BCB1D1.4020800@worldnet.att.net> <424tgaF1h9oseU1@individual.net> <9qGdnSBcZLnC6SDeRVn-ow@comcast.com> Date: Fri, 06 Jan 2006 18:46:40 GMT On Thu, 05 Jan 2006 14:30:07 -0500, Dave Edwards top-posted: > Still using the 275Mhz hp1726A that was given to me when I started working > for HP in '83. > I keep it covered when not being used, so it still looks like new. Perhaps > some day it will crap out, and I'll try a Tek!! > Every now and then, one lucks out on a HP scope. For the most part, the HP scopes I've used have been pretty marginal. There was one that was an absolute nightmare, but that was a special case, because it was military, and it was in a special case. The knobs all had little waterproof rubber skirts, which had backlash that makes ordinary backlash look like nothing at all. You had to go _WAY_ past the setting you wanted, and hope that when the knob sprang back it would land on the setting. I remarked to a coworker: "It probably wouldn't even be a good boat anchor, because it would float." I _did_ once use an HP that was tolerable. But If I'm the one who signs the check, my first choice, of course, would be a Tek. :-) Cheers! Rich > > "Richard Henry" wrote in message > news:424tgaF1h9oseU1@individual.net... >> >> "Chuck Harris" wrote in message >> news:v4edneO2SYsvtCDenZ2dnUVZ_tqdnZ2d@rcn.net... >>> Atsunori Tamagawa wrote: >>> >>> > I own some scopes. Though, my favorite is not one of Tek ones, but >>> > HP-1741A storage scope. >>> >>> Hmmm? I cannot imagine what you like about the 1741A, but different >>> strokes for different folks. >>> >>> Be very careful with that grey horizontal timing switch knob. HP cut >>> two (or was it 3?) slots that each cover 175 (115?) degrees through >>> the body >> of the knob. >>> They did that so that you could see the light mounted on the panel >>> through >>> the knob. Well, when the switch's lubrication gets a little sticky, >>> and you get a little enthusiastic (and lord knows the plastic is >>> already at least 18 years old), you will snap those thin little bits >>> of plastic, and your knob will be gone, and your scope will be >>> unusable. Forget about >>> gluing it, as there was barely enough strength with the virgin >>> plastic. >>> >>> We had dozens of that family of HP scope, and they all went into scrap >> because >>> the knobs were unavailable. >>> >>> Tektronix did the same thing with their horizontal knobs, but they >>> knew enough about materials engineering to make the body of the knob >>> out of aluminum, and make the grip surface of the knob out of plastic. >> >> I never had a HP scope that I liked, or would use unless there was no >> Tek scope available. >> >> Article: 101280 of rec.radio.amateur.boatanchors From: "Rich Grise, but drunk" Subject: Re: Favorite Tektronix Scope Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> <43b9cdbd.20688672@free.teranews.com> <43BCB1D1.4020800@worldnet.att.net> <424tgaF1h9oseU1@individual.net> <43BDB11D.40F42684@earthlink.net> <426e2rF1gra3aU1@individual.net> <1136567805.111748.68830@g43g2000cwa.googlegroups.com> Date: Fri, 06 Jan 2006 18:48:15 GMT On Fri, 06 Jan 2006 09:16:45 -0800, Too_Many_Tools wrote: > "The HP 130C was an excellent oscilloscope. > It has been stadily downhill from there. " > > I agree. > > Why do you think that happened? > > TMT Because an oscilloscope isn't a Wein (Wien?)-bridge oscillator? Thanks, Rich Article: 101281 of rec.radio.amateur.boatanchors From: "Frank Dresser" References: <1136499466.200529.258680@g14g2000cwa.googlegroups.com> Subject: Re: Hallicrafters SX-42 Parts Needed Message-ID: Date: Fri, 06 Jan 2006 19:02:55 GMT "Phil Nelson" wrote in message news:GLKdnd29vqincSDeRVn-hQ@giganews.com... > Two of the connectors on my set are half-stripped and > wobbly. > Do you still have washers under all the connector screws? On my SX-62, the connector screws threads were undercut at the base. I was missing a couple of washers, and the phrase "half-stripped and wobbly" would have described the connections perfectly, until I replaced the washers. Frank Dresser Article: 101282 of rec.radio.amateur.boatanchors Message-ID: <43BEBFDA.2050907@worldnet.att.net> From: Atsunori Tamagawa Subject: Re: Favorite Tektronix Scope References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> <43b9cdbd.20688672@free.teranews.com> <43BCB1D1.4020800@worldnet.att.net> <424tgaF1h9oseU1@individual.net> <43BDB11D.40F42684@earthlink.net> <426e2rF1gra3aU1@individual.net> <1136567805.111748.68830@g43g2000cwa.googlegroups.com> Date: Fri, 06 Jan 2006 19:07:10 GMT Rich Grise, but drunk wrote: > >>"The HP 130C was an excellent oscilloscope. >>It has been stadily downhill from there. " >> >>I agree. >> >>Why do you think that happened? >> > > Because an oscilloscope isn't a Wein (Wien?)-bridge oscillator? No, they became short of CRT's because of their success in network analyzer business, perhaps. It seems that more people are having trouble with HP scopes than I thought. One has to treat scopes gently, just like treating women's body. Instead of "pushing" buttons, one has to "touch" them. Atsunori Article: 101283 of rec.radio.amateur.boatanchors From: "NORMAN TRIANTAFILOS" Subject: Hey Tony Message-ID: Date: Fri, 06 Jan 2006 19:17:48 GMT hey bodo (wa9yoz) you lurkin around in here... Article: 101284 of rec.radio.amateur.boatanchors From: "Tim Williams" References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> <6hZtf.3293$vL4.3204@bignews1.bellsouth.net> <43b8d277.34617210@free.teranews.com> <43b9cdbd.20688672@free.teranews.com> <43BCB1D1.4020800@worldnet.att.net> <424tgaF1h9oseU1@individual.net> <43BDB11D.40F42684@earthlink.net> <426e2rF1gra3aU1@individual.net> <1136567805.111748.68830@g43g2000cwa.googlegroups.com> <43BEBFDA.2050907@worldnet.att.net> Subject: Re: Favorite Tektronix Scope Message-ID: Date: Fri, 6 Jan 2006 13:57:27 -0600 "Atsunori Tamagawa" wrote in message news:43BEBFDA.2050907@worldnet.att.net... > One has to treat scopes gently, just like treating women's body. > Instead of "pushing" buttons, one has to "touch" them. Well, no duh...I mean, which of these looks more like a 'scope? http://webpages.charter.net/dawill/Images/Man-Woman.jpg Tim -- Deep Fryer: a very philosophical monk. Website: http://webpages.charter.net/dawill/tmoranwms Article: 101285 of rec.radio.amateur.boatanchors From: "M. J. Powell" Subject: Re: Favorite Tektronix Scope Date: Fri, 6 Jan 2006 17:22:18 +0000 Message-ID: References: <1136148561.946351.257400@g44g2000cwa.googlegroups.com> In message <39KdnZtLUbvICiDeRVn-iQ@rcn.net>, Chuck Harris writes >Dave Edwards wrote: >> Still using the 275Mhz hp1726A that was given to me when I started >>working for HP in '83. >> I keep it covered when not being used, so it still looks like new. >>Perhaps some day it will crap out, and I'll try a Tek!! > >I haven't seen that reliability is a problem with the 1726A. They go and >go... Drift is a bad problem, the zero goes all over the place, and needs >constant diddling. It is all but impossible to adjust so that the variable >volts/division knob doesn't shift the zero (and have it stay adjusted). The >horizontal time knob is a really bad problem, as I discussed in an earlier >note. If you haven't taken your scope apart, and oiled that switch's shaft, >and replaced the grease on the ball detent, I would strongly suggest that you >do so. When the knob breaks, it is end of game. May be relevant. When a plastic eyepiece on my father's WW I binoculars shattered I found a company that made an exact copy from the other eyepiece which I sent them. This was some twenty five years ago. I don't know what the plastic was, possibly some form of Bakelite or Ebonite. Mike -- M.J.Powell Article: 101286 of rec.radio.amateur.boatanchors From: "Brian Hill" References: <1136522650.634110.307390@g43g2000cwa.googlegroups.com> Subject: Re: The Radio Finder Message-ID: Date: Fri, 6 Jan 2006 15:06:57 -0600 "rckchp" wrote in message news:1136522650.634110.307390@g43g2000cwa.googlegroups.com... >I can't seem to connect to Joel Thurtell's "The Radio Finder" web site. > Does anyone know if it has been closed down? Thanks. > > Rich k2cpe > It's been gone a long time. I heard he sells on EBay but I don't know his handle? -- Regards B.H. Brian's Basement http://webpages.charter.net/brianhill/6.htm Brian's Radio Universe http://webpages.charter.net/brianhill/500.htm Article: 101287 of rec.radio.amateur.boatanchors From: "Fred W4JLE" References: <7af6b$43b9c98d$471d2513$30052@ALLTEL.NET> <43BA7167.1060903@adelphia.net> <43BDCC6C.7070004@adelphia.net> Subject: Re: Collins 18 S-4 Date: Fri, 6 Jan 2006 19:40:12 -0500 Message-ID: <5aabb$43bee406$471d2687$21415@ALLTEL.NET> I have a manual coming, if you have any particular areas you need info on let me know. If the copyright has expired, I will scan it an publish it on LuLu press. I have two and I am awaiting the manual to see what goes in the rear of the chasis that seems to be missing from both of mine. There is a cradle that goes across the back and nothing occupies the space on either of mine. "MilRad" wrote in message news:MilRad.218ev9@news.radiobanter.com... > > Thanks for the great tips. I guess I will nail down a manual/schematic > and lay down a battle plan from then on. I like the VFO/RF section > idea. > > 73, > > Mark > > > K3HVG Wrote: > > Mark, I built a control head. No big thing. Also, AM is the deafult. > > All you really need do is plug in a mic on the front panel. RF and AF > > gain must be controlled externally, of course. The crystals you have > > won't do you much good but you can have a set cut for.. say 3885, or > > such. That's what I did. I hooked a Heath VFO up to the transmitter > > and it worked OK. The 18-S4A receiver is much better than the > > straight > > unit inasmuch as it has a mech filter installed. The straight unit is > > as broad as a TCS! Also, I did not use the fixed elements in the TX > > tank circuit. I brought out the "untuned" RF into an external > > PI-network (instead of the tuner) for 80 meters. That way, I could > > tune > > wherever needed and not worry about the fixed freq. tank components. > > I > > have both original Collins 18-S4 and 18-S4A manuals. Unfortunately, I > > no longer have "unlimited copy capability"...hi! > > > -- > MilRad Article: 101288 of rec.radio.amateur.boatanchors From: "Fred W4JLE" Subject: Capehart R-390A Date: Fri, 6 Jan 2006 20:11:39 -0500 Message-ID: I would like to trade a Capehart R-390A for a linear. Prefer something using 3-500Z tubes. I have tubes if yours doesnt. Looks are not all that important, but working condition is a must. The R-390A is in nice condition with no mods. The Megacycle and Kilocycle knobs work freely and checking against WWV seems to be on frequency. Like any receiver of this age it could use an alignment and possibly some tubes are weak. There are no covers or case with the receiver. If you are interested, we can swap pictures. For a really nice amp, I will throw in an antenna coupler (CU 168/FRR) that can feed 5 receivers. Like the receiver, the coupler was designed by Collins to go with the 390's but this one manufactured by another company. Looks like new. I don't want to overstate it, but it is clean for it's age and is not one of the junkers floating around on ebay.