Article: 96939 of rec.radio.amateur.homebrew Subject: Apology to all for my Netiquette "Sorry" From: lezhewitt67@hotmail.com Message-ID: <7lbVf.238945$Q22.186739@fe1.news.blueyonder.co.uk> Date: Sat, 25 Mar 2006 13:12:35 GMT I am writing this email to apologise for the Message i sent earlier, which has upset a few people. As a Newbie to usenets i didnt realise what i was doing and i assure you i wont do it again. I am sorry to all concerned. My apologies lezHewitt. NO REPLY Article: 96940 of rec.radio.amateur.homebrew Subject: Re: mixer: DBM or dual gate mosfet? From: JJ References: <1141203801.248815.322050@e56g2000cwe.googlegroups.com> <4406fe2e$0$25339$39db0f71@news.song.fi> <120ei436906hh32@corp.supernews.com> <2F7Of.879$s8.113@bignews7.bellsouth.net> <1142724825.475143.34810@v46g2000cwv.googlegroups.com> <1142934109.266286.184930@e56g2000cwe.googlegroups.com> <9fvv12lkd8qcghig78dcjpitlg2s37bm1k@4ax.com> <1143306639.128205.81900@g10g2000cwb.googlegroups.com> Message-ID: Date: Sat, 25 Mar 2006 12:48:23 -0500 "Giancarlo Gian Moda, I7SWX" wrote in news:1143306639.128205.81900@g10g2000cwb.googlegroups.com: > Well one need to start from somewhere to improuve a receiver. If the > non mixer stages have a maximum IP3 of around +15dBm, certainly a > +35/40dBm mixer may not make much of a difference, unless it is > replacing a NE602. In this case you may use the I7SWX 1 transformer > double balanced mixer using the FST3125 (half of an H-Mode mixer) with > an IP3 of +25dBm. > > > Gian > I7SWx > That is a very interesting suggestion. Where can I find the 1 transformer DBM using the FST3125? JJ Article: 96941 of rec.radio.amateur.homebrew From: "RST Engineering" Subject: OT: Hamming along the Alcan Highway Date: Sat, 25 Mar 2006 10:11:18 -0800 Message-ID: <316ba$442587c3$4251297f$24613@DIALUPUSA.NET> Gail (KB9MII) and I (WX6RST) are going up the Alcan to Wasilla by way of Seattle in June. Can anybody shed light on whether there is any activity along this route, especially on 2 meters. We can jury-rig anything from 80 meters to 1 Gig if we have to, but 2 would work exceptionally well. Jim Article: 96942 of rec.radio.amateur.homebrew From: Me Subject: Re: OT: Hamming along the Alcan Highway References: <316ba$442587c3$4251297f$24613@DIALUPUSA.NET> Message-ID: Date: Sat, 25 Mar 2006 18:52:33 GMT In article <316ba$442587c3$4251297f$24613@DIALUPUSA.NET>, "RST Engineering" wrote: > Gail (KB9MII) and I (WX6RST) are going up the Alcan to Wasilla by way of > Seattle in June. Can anybody shed light on whether there is any activity > along this route, especially on 2 meters. We can jury-rig anything from 80 > meters to 1 Gig if we have to, but 2 would work exceptionally well. > > Jim > > 9:30Am Pacific 14292.0Khz Alaska Pacific Net Me Article: 96943 of rec.radio.amateur.homebrew From: John Wilkinson Subject: Connection for clock distribution Date: Sun, 26 Mar 2006 21:20:06 +0100 Message-ID: Hi, I have a 1MHz clock that I need to disribute to several boards. I am using RS485 drivers and receivers to do this, along with twisted screened cable. The question is that I need a 2 pole pcb connector that is screened. Does anyone know of such a beast? Thanks, John. Article: 96944 of rec.radio.amateur.homebrew From: "W3JDR" References: Subject: Re: Connection for clock distribution Message-ID: Date: Sat, 25 Mar 2006 20:43:25 GMT John, How about a miniature stereo phono plug? These have 2 signal circuits plus a ground. They're common, they're available in many PCB configurations, and they're cheap. Joe W3JDR "John Wilkinson" wrote in message news:pz9hqkfgbjzv$.bt57lm5w2m2p$.dlg@40tude.net... > Hi, > I have a 1MHz clock that I need to disribute to several boards. I am using > RS485 drivers and receivers to do this, along with twisted screened > cable. > > The question is that I need a 2 pole pcb connector that is screened. > Does anyone know of such a beast? > > Thanks, > John. Article: 96945 of rec.radio.amateur.homebrew From: "Caveat Lector" References: <316ba$442587c3$4251297f$24613@DIALUPUSA.NET> Subject: Re: Hamming along the Alcan Highway Message-ID: Date: Sat, 25 Mar 2006 13:29:48 -0800 See BC Repeater lists at URL; http://www.bcarcc.org/ Also http://www.bcarcc.org/bcnorth.pdf -- CL -- I doubt, therefore I might be ! "RST Engineering" wrote in message news:316ba$442587c3$4251297f$24613@DIALUPUSA.NET... > Gail (KB9MII) and I (WX6RST) are going up the Alcan to Wasilla by way of > Seattle in June. Can anybody shed light on whether there is any activity > along this route, especially on 2 meters. We can jury-rig anything from > 80 meters to 1 Gig if we have to, but 2 would work exceptionally well. > > Jim > Article: 96946 of rec.radio.amateur.homebrew From: "Dale Parfitt" References: <1143049636.448285.24980@j33g2000cwa.googlegroups.com> <1143321832.545680.142220@g10g2000cwb.googlegroups.com> Subject: Re: Eddystone dial Message-ID: Date: Sat, 25 Mar 2006 23:54:28 GMT wrote in message news:1143321832.545680.142220@g10g2000cwb.googlegroups.com... >> Dale W4OP, > > Dale, > > I believe you posted an e-mail and a link to QRP-L a while back to show > your receiver. Should have said this before but better late than never. > Nice job. > > If I remember correctly you used a basic 160M receiver with multiple > front end convertors. Also I believe you used blue backlighting? > > Don, > > K5UOS Hi Don, Thanks for the kind words. The receiver is based on W7ZOI's Progressive RX >from the late 80's. To Wes's excellent design I added, S meter AM detection LM386 for loudspeaker w/ tone control audio notch filter Homebrew 5/2.5/.5 xtal filters fast/slow/off AGC 80M RX with xtal controlled converters for 160/49/40/20/15/10ABC The VFO drifts a little over 150Hz in the 1st 5 minutes then settles down to +/- 20Hz in a 5 minute period. Wonderful sound and gets more use than the PRO II 73, Dale W4OP > Article: 96947 of rec.radio.amateur.homebrew Date: Sun, 26 Mar 2006 10:09:08 +0800 From: Richard Hosking Subject: Re: 45 MHz IF breakthrough References: <1jimvb5qzpfuz.eqwrplvmo554$.dlg@40tude.net> Message-ID: <4425f7c4$0$21305$5a62ac22@per-qv1-newsreader-01.iinet.net.au> Unless you have to move the IF osc around, why not use a crystal? With a 5 KHz PLL reference, you might have some sidebands from this. What is the cutoff of the loop filter? R John Wilkinson wrote: > Hi, > OK I have a 45MHz crystal filter for my first IF. > The first LO ranges from 45-75MHz. > To test I am using a 45.455MHz LO, which is a pll design. > When I connect up the LO to the mixer, with no input signal I get a -80dBm > level out of my IF stage!! > The PLL is clocked off 1MHz ref divided down to 5KHz. The 1MHz ref is a TTL > signal. Could this be the cause of the problem, and if so how do I get > around it? > > Thanks, > John. Article: 96948 of rec.radio.amateur.homebrew From: Allison-nospam@nouce.bellatlantic.net Subject: Re: mixer: DBM or dual gate mosfet? Message-ID: References: <2F7Of.879$s8.113@bignews7.bellsouth.net> <1142724825.475143.34810@v46g2000cwv.googlegroups.com> <1142934109.266286.184930@e56g2000cwe.googlegroups.com> <9fvv12lkd8qcghig78dcjpitlg2s37bm1k@4ax.com> <1143306639.128205.81900@g10g2000cwb.googlegroups.com> <1143365668.224763.298690@i40g2000cwc.googlegroups.com> Date: Sun, 26 Mar 2006 18:27:28 GMT On 26 Mar 2006 01:34:28 -0800, "Giancarlo Gian Moda, I7SWX" wrote: >Hi JJ, > >the note on the 1T DBM was reported in RadCom, Technical Topics column, >June 2004. > >I asked a friend to insert all mixer infos in my web page >www.qsl.net/i7swx but I do not know when he will be able to do it. In >my web page in homebrewing you my read the experiences and measuremnts >done by JA9TTT on both versions (3T & 2T) of the H-Mode Mixer. This is >a software package translation from japanese but it is understandable. >You will be able to see Spectrum Analyzer measurents too. > >If you send me (callsignatyahoo.com) your e-mail address I can send you >the complete 1T DBM note in english (more stuff than in TT). QEX also has a few articles, also check out KD1JVs site as he has a project that uses similar. > >A NOTE for ALLISON ... I see you have been fiddling with DEC stuff. >Were you working for DEC or a customer? I was with DEC for a quarter of >a century ...hi Hi Gian, I was a digit (dec empoyee) for 10 years. I still have and use PDP-8, PDP11 and uVAX. I show up in the CP/M and PDP11/VAX usenets. Your name is familiar to me from many places and more than a few articles. Just tried out my new homebrew portable 6M SSB ring on the local net this morning and it works as wished. Allison KB1GMX Article: 96949 of rec.radio.amateur.homebrew From: "W3JDR" References: Subject: Re: Connection for clock distribution Message-ID: <9zDVf.5214$ES3.888@trnddc02> Date: Sun, 26 Mar 2006 21:19:01 GMT The author said it was RS-485. This is a 2-wire differential signalling system. He also wants to use a shield. Hence the need for 3 circuits. I doubt that reflections will play any part in the performance, especially considering that he's using twisted-pair for the signals. This is how CAT5 RS-485 distribution works. Besides, he's talking about a1 MHz presumably steady-state square-wave clock and presumably short board-to-board connection lengths. Joe W3JDR "jack" wrote in message news:ue-dnVd2J4vVebvZRVn-vQ@comcast.com... > Problem with a phono-plug and a clock signal is that you will get > reflection > back -- probably much better off with a BNC or SMA connector. > > "W3JDR" wrote in message > news:NXhVf.9224$6%2.4606@trnddc08... >> John, >> How about a miniature stereo phono plug? These have 2 signal circuits >> plus > a >> ground. They're common, they're available in many PCB configurations, and >> they're cheap. >> >> Joe >> W3JDR >> >> >> "John Wilkinson" wrote in message >> news:pz9hqkfgbjzv$.bt57lm5w2m2p$.dlg@40tude.net... >> > Hi, >> > I have a 1MHz clock that I need to disribute to several boards. I am > using >> > RS485 drivers and receivers to do this, along with twisted screened >> > cable. >> > >> > The question is that I need a 2 pole pcb connector that is screened. >> > Does anyone know of such a beast? >> > >> > Thanks, >> > John. >> >> > > Article: 96950 of rec.radio.amateur.homebrew From: Dave Hildebrand Subject: Need Info 4 Midland 70-1526B UHF Radio Date: Sun, 26 Mar 2006 19:24:03 -0800 Message-ID: I recently bought a Midland 70-1526B UHF radio, and I would like greatly appreciative of any information on it (e.g. schematic, etc.), including where I might find programming software for it. 73s... ...Dave, N6BHU Article: 96951 of rec.radio.amateur.homebrew From: "Tom Holden" Subject: 1000+ Members - Group for Radio Shack DX-394 Users Message-ID: Date: Sun, 26 Mar 2006 23:07:17 -0500 This group has the most complete collection of modifications, usage tips, links to related websites, documentation, and photos along with a user survey and a message forum (4000+ messages archived) to help you get the most fun and DX out of your Realistic / Radio Shack DX-394, DX394, DX 394. Over 90 mods and tips now listed plus a dozen on the To Do or Wish List. More mods than for any other general coverage receiver! Thoroughly documented with a Master Index. If you like to tinker with radios, I know of no other recent model that lends itself to as much fun in this arena as the DX-394. Great platform for learning radio-electronics. Always 1 or more FA on eBay. Active & friendly user community now with over 1000 members. Some members are keen short wave listeners; others are into AM DXing and a few enjoy long wave. Many experiment with antennas and some are ardent modifiers - customising and souping up the rig as hot rodders would do with cars. You'll find lots to interest you and help get the most out of your radio. All here at: http://groups.yahoo.com/group/­RADIOSHACKDX394/ Subscribe on line (for full access privileges to the extensive collection of Files, Photos and Links) or by email: RADIOSHACKDX394-subscribe@yaho­ogroups.com (for message posting/receipt only). 73, Tom Article: 96952 of rec.radio.amateur.homebrew From: John Wilkinson Subject: Re: Connection for clock distribution References: <9zDVf.5214$ES3.888@trnddc02> Date: Mon, 27 Mar 2006 09:01:01 +0100 Message-ID: <1w48tu8v4g7cx.1bt9ir1638gsb.dlg@40tude.net> On Sun, 26 Mar 2006 21:19:01 GMT, W3JDR wrote: > The author said it was RS-485. This is a 2-wire differential signalling > system. He also wants to use a shield. Hence the need for 3 circuits. I > doubt that reflections will play any part in the performance, especially > considering that he's using twisted-pair for the signals. This is how CAT5 > RS-485 distribution works. > > Besides, he's talking about a1 MHz presumably steady-state square-wave clock > and presumably short board-to-board connection lengths. > > > Joe > W3JDR > > > "jack" wrote in message > news:ue-dnVd2J4vVebvZRVn-vQ@comcast.com... >> Problem with a phono-plug and a clock signal is that you will get >> reflection >> back -- probably much better off with a BNC or SMA connector. >> >> "W3JDR" wrote in message >> news:NXhVf.9224$6%2.4606@trnddc08... >>> John, >>> How about a miniature stereo phono plug? These have 2 signal circuits >>> plus >> a >>> ground. They're common, they're available in many PCB configurations, and >>> they're cheap. >>> >>> Joe >>> W3JDR >>> >>> >>> "John Wilkinson" wrote in message >>> news:pz9hqkfgbjzv$.bt57lm5w2m2p$.dlg@40tude.net... >>> > Hi, >>> > I have a 1MHz clock that I need to disribute to several boards. I am >> using >>> > RS485 drivers and receivers to do this, along with twisted screened >>> > cable. >>> > >>> > The question is that I need a 2 pole pcb connector that is screened. >>> > Does anyone know of such a beast? >>> > >>> > Thanks, >>> > John. >>> >>> >> >> HI, Yes this is a differential signale, so needs 2 connections plus ground for the shield. I have looked for these stereo phono plugs, but to no avail, any idea who stocks them, RS/Farnell numbers. Thanks, John. Article: 96953 of rec.radio.amateur.homebrew From: "W3JDR" References: <9zDVf.5214$ES3.888@trnddc02> <1w48tu8v4g7cx.1bt9ir1638gsb.dlg@40tude.net> Subject: Re: Connection for clock distribution Message-ID: <97PVf.4287$Od7.4222@trnddc06> Date: Mon, 27 Mar 2006 10:28:21 GMT John, Over here we'd just run down to the nearest Radio Shack store, or if we had to mail-order them we'd go to Digikey (www.digikey.com) or Mouser www.mouser.com). Here is a link to a digikey catalog page that shows the different types they carry: http://dkc3.digikey.com/PDF/T061/0304.pdf Also, here is a link to a Digikey search page from which you can narrow your search down to a specific type and stock number: http://www.digikey.com/scripts/DkSearch/dksus.dll?Criteria?Ref=4998&Site=US&Cat=32440884 If you follow the above link to a specific connector, you'll eventually get to a page that has the manufacturer's web sites and datasheet information. This might help you at least pick a connector type, then go to the manufacturer's web page and find out who stocks the part in your area. Joe W3JDR "John Wilkinson" wrote in message news:1w48tu8v4g7cx.1bt9ir1638gsb.dlg@40tude.net... > On Sun, 26 Mar 2006 21:19:01 GMT, W3JDR wrote: > >> The author said it was RS-485. This is a 2-wire differential signalling >> system. He also wants to use a shield. Hence the need for 3 circuits. I >> doubt that reflections will play any part in the performance, especially >> considering that he's using twisted-pair for the signals. This is how >> CAT5 >> RS-485 distribution works. >> >> Besides, he's talking about a1 MHz presumably steady-state square-wave >> clock >> and presumably short board-to-board connection lengths. >> >> >> Joe >> W3JDR >> >> >> "jack" wrote in message >> news:ue-dnVd2J4vVebvZRVn-vQ@comcast.com... >>> Problem with a phono-plug and a clock signal is that you will get >>> reflection >>> back -- probably much better off with a BNC or SMA connector. >>> >>> "W3JDR" wrote in message >>> news:NXhVf.9224$6%2.4606@trnddc08... >>>> John, >>>> How about a miniature stereo phono plug? These have 2 signal circuits >>>> plus >>> a >>>> ground. They're common, they're available in many PCB configurations, >>>> and >>>> they're cheap. >>>> >>>> Joe >>>> W3JDR >>>> >>>> >>>> "John Wilkinson" wrote in message >>>> news:pz9hqkfgbjzv$.bt57lm5w2m2p$.dlg@40tude.net... >>>> > Hi, >>>> > I have a 1MHz clock that I need to disribute to several boards. I am >>> using >>>> > RS485 drivers and receivers to do this, along with twisted screened >>>> > cable. >>>> > >>>> > The question is that I need a 2 pole pcb connector that is screened. >>>> > Does anyone know of such a beast? >>>> > >>>> > Thanks, >>>> > John. >>>> >>>> >>> >>> > > HI, > Yes this is a differential signale, so needs 2 connections plus ground for > the shield. > > I have looked for these stereo phono plugs, but to no avail, any idea who > stocks them, RS/Farnell numbers. > > Thanks, > John. Article: 96954 of rec.radio.amateur.homebrew From: "Jack Ricci" Subject: Re: 1000+ Members - Group for Radio Shack DX-394 Users Date: Mon, 27 Mar 2006 07:52:00 -0500 Message-ID: References: The addresses to subscribe to this group do not work from Canada. Any mistakes? I get the message that this group does not exist... Jack "Tom Holden" wrote in message news:WxJVf.448$u15.105252@news20.bellglobal.com... > This group has the most complete collection of modifications, usage tips, > links to related websites, documentation, and photos along with a user > survey and a message forum (4000+ messages archived) to help you get the > most > fun and DX out of your Realistic / Radio Shack DX-394, DX394, DX 394. > > Over 90 mods and tips now listed plus a dozen on the To Do or Wish List. > More mods than for any other general coverage receiver! Thoroughly > documented with a Master Index. If you like to tinker with radios, I know > of > no other recent model that lends itself to as much fun in this arena as > the > DX-394. Great platform for learning radio-electronics. Always 1 or more FA > on eBay. > > Active & friendly user community now with over 1000 members. Some members > are > keen short wave listeners; others are into AM DXing and a few enjoy long > wave. Many experiment with antennas and some are ardent modifiers - > customising and souping up the rig as hot rodders would do with cars. > You'll > find lots to interest you and help get the most out of your radio. > > All here at: > http://groups.yahoo.com/group/­RADIOSHACKDX394/ > > Subscribe on line (for full access privileges to the extensive collection > of Files, Photos and Links) or by email: > RADIOSHACKDX394-subscribe@yaho­ogroups.com (for message posting/receipt > only). > > 73, Tom > Article: 96955 of rec.radio.amateur.homebrew From: "Tom Holden" Subject: 1000+ Members - Radio Shack DX-394 User Group Message-ID: Date: Mon, 27 Mar 2006 08:42:06 -0500 (Let's try again with the URL hopefully corrected - I don't understand how they got corrupted in distribution - looks alright leaving here and on screen but the actual properties show an extra character) This group has the most complete collection of modifications, usage tips, links to related websites, documentation, and photos along with a user survey and a message forum (4000+ messages archived) to help you get the most fun and DX out of your Realistic / Radio Shack DX-394, DX394, DX 394. Over 90 mods and tips now listed plus a dozen on the To Do or Wish List. More mods than for any other general coverage receiver! Thoroughly documented with a Master Index. If you like to tinker with radios, I know of no other recent model that lends itself to as much fun in this arena as the DX-394. Great platform for learning radio-electronics. Always 1 or more FA on eBay. Active & friendly user community now with over 1000 members. Some members are keen short wave listeners; others are into AM DXing and a few enjoy long wave. Many experiment with antennas and some are ardent modifiers - customising and souping up the rig as hot rodders would do with cars. You'll find lots to interest you and help get the most out of your radio. All here at: http://groups.yahoo.com/group/RADIOSHACKDX394/ Subscribe on line (for full access privileges to the extensive collection of Files, Photos and Links) or by email: RADIOSHACKDX394-subscribe@yahoogroups.com (for message posting/receipt only). 73, Tom Article: 96956 of rec.radio.amateur.homebrew From: "Caveat Lector" References: Subject: Re: 1000+ Members - Group for Radio Shack DX-394 Users Message-ID: Date: Mon, 27 Mar 2006 06:05:07 -0800 Just FYI: I see a lot of these mods to increase sensitivity -- resulting in trashing the dynamic range Remember some of these mods are made by amateurs The factory engineers designed the sensitivity for very good reasons -- CL -- I doubt, therefore I might be ! "Tom Holden" wrote in message news:WxJVf.448$u15.105252@news20.bellglobal.com... > This group has the most complete collection of modifications, usage tips, > links to related websites, documentation, and photos along with a user > survey and a message forum (4000+ messages archived) to help you get the > most > fun and DX out of your Realistic / Radio Shack DX-394, DX394, DX 394. > > Over 90 mods and tips now listed plus a dozen on the To Do or Wish List. > More mods than for any other general coverage receiver! Thoroughly > documented with a Master Index. If you like to tinker with radios, I know > of > no other recent model that lends itself to as much fun in this arena as > the > DX-394. Great platform for learning radio-electronics. Always 1 or more FA > on eBay. > > Active & friendly user community now with over 1000 members. Some members > are > keen short wave listeners; others are into AM DXing and a few enjoy long > wave. Many experiment with antennas and some are ardent modifiers - > customising and souping up the rig as hot rodders would do with cars. > You'll > find lots to interest you and help get the most out of your radio. > > All here at: > http://groups.yahoo.com/group/­RADIOSHACKDX394/ > > Subscribe on line (for full access privileges to the extensive collection > of Files, Photos and Links) or by email: > RADIOSHACKDX394-subscribe@yaho­ogroups.com (for message posting/receipt > only). > > 73, Tom > Article: 96957 of rec.radio.amateur.homebrew From: "Jack Ricci" Subject: Re: 1000+ Members - Group for Radio Shack DX-394 Users Date: Mon, 27 Mar 2006 08:52:27 -0500 Message-ID: References: TH - The Group's Link/URL got truncated/cut. Radio Shack DX-394 User's Group RadioShack DX394 {DX 394} DX-394 => http://tinyurl.com/o6rgr Radio Shack DX-394 User's Group RadioShack DX394 {DX 394} http://groups.yahoo.com/group/RADIOSHACKDX394/ OOOoooopps! Correction noted. Thanks. Jack "Jack Ricci" wrote in message news:e08n5h02vrm@enews4.newsguy.com... > The addresses to subscribe to this group do not work from Canada. Any > mistakes? I get the message that this group does not exist... > > Jack > > "Tom Holden" wrote in message > news:WxJVf.448$u15.105252@news20.bellglobal.com... >> This group has the most complete collection of modifications, usage tips, >> links to related websites, documentation, and photos along with a user >> survey and a message forum (4000+ messages archived) to help you get the >> most >> fun and DX out of your Realistic / Radio Shack DX-394, DX394, DX 394. >> >> Over 90 mods and tips now listed plus a dozen on the To Do or Wish List. >> More mods than for any other general coverage receiver! Thoroughly >> documented with a Master Index. If you like to tinker with radios, I know >> of >> no other recent model that lends itself to as much fun in this arena as >> the >> DX-394. Great platform for learning radio-electronics. Always 1 or more >> FA >> on eBay. >> >> Active & friendly user community now with over 1000 members. Some members >> are >> keen short wave listeners; others are into AM DXing and a few enjoy long >> wave. Many experiment with antennas and some are ardent modifiers - >> customising and souping up the rig as hot rodders would do with cars. >> You'll >> find lots to interest you and help get the most out of your radio. >> >> All here at: >> http://groups.yahoo.com/group/­RADIOSHACKDX394/ >> >> Subscribe on line (for full access privileges to the extensive collection >> of Files, Photos and Links) or by email: >> RADIOSHACKDX394-subscribe@yaho­ogroups.com (for message posting/receipt >> only). >> >> 73, Tom >> > > Article: 96958 of rec.radio.amateur.homebrew From: Allison-nospam@nouce.bellatlantic.net Subject: Re: mixer: DBM or dual gate mosfet? Message-ID: References: <1142724825.475143.34810@v46g2000cwv.googlegroups.com> <1142934109.266286.184930@e56g2000cwe.googlegroups.com> <9fvv12lkd8qcghig78dcjpitlg2s37bm1k@4ax.com> <1143306639.128205.81900@g10g2000cwb.googlegroups.com> <1143365668.224763.298690@i40g2000cwc.googlegroups.com> <1143467317.326966.226250@e56g2000cwe.googlegroups.com> Date: Mon, 27 Mar 2006 15:52:23 GMT On 27 Mar 2006 05:48:37 -0800, "Giancarlo Gian Moda, I7SWX" wrote: >Hi Allison, > >thanks for the update. I was with DEC from 69 till 93 ... serial # >7133 ...hi >From '83 to '93. Had a 6digit number as I was part of CSSE and central engineering for high end printing systems. I really liked the Mill. >My #1 machine (FS) was PDP9 , also PDP series and alittle bit PDP11 and >15... I applied several mods in the field that made crazy many people >in DEC ... but we were working in he field without spare parts ...I >replaced transistros, transformers (core mem drivers) ICs...etc.... The >day I was told not to do on my way...I saw something wrong.. the >largest PDP9 installation in the world (I3) went into smoke ... then my >boss changed mind...hiu Ah, the plastics fire if memory serves. Never played with any of the 15bit hardware or the controls. Just PDP-8, 10, 11 and VAX. >Glad you got your 6m SSB rig working nicely. Just finishing up a 85W brick for it now. >BTW if you are in Mass and you do hear my good friend Art, K1GBX, on 6 >meters please say hallo for me... he will get crazy...hi I also have >some other good friends from the old DEC Ham club and others... Just talked to him this weekend! He's about 30miles NE of me. Next net I'll mention you name and say HI.. One of his project was to restart the old AM nets, he's got maybe 6-8 regulars. Small world, smaller if we get some propagation. Allison KB1GMX , I can be contated via email mycall at the ARRL reflector dot net. Article: 96959 of rec.radio.amateur.homebrew From: Allison-nospam@nouce.bellatlantic.net Subject: Re: Info needed on Motorola 2 tube RF deck Message-ID: <3k2g229vv9j81mkoaafq3fc0q19nfe0rfq@4ax.com> References: Date: Mon, 27 Mar 2006 15:57:30 GMT On Sun, 26 Mar 2006 21:17:17 -0500, "Ken" wrote: >I have a Motorola amplifier from a working remote base. The only number I >can find TLD6612A on the PA deck. It is a two tube, conduction cooled >amplifier that was operating on 161 mhz. The tubes are 65-82282D02 (Eimac >8560AS I am told is the same tube). I would like to know if anyone has >converted one of these PAs to 2 meter SSB and any hints of how to do so. I >don't have the manual for the remote base or the PA. > >Please reply to the group. > >Thanks guys, >Ken IF it's the one I remember just retune it. For SSB you will have to run different bias and accept lower power. The original design ran Class C FM and is totally unsuited for SSB without different bias. As memory serves for FM that was either a 40 or 60W package and for SSB you cant run that hard. Also the input power limit was very low (well under 1W). Allison Allison Article: 96960 of rec.radio.amateur.homebrew From: "Caveat Lector" References: <1143474638.836258.56200@v46g2000cwv.googlegroups.com> Subject: Re: D104 distortion Message-ID: Date: Mon, 27 Mar 2006 08:43:37 -0800 Just a guess -- but maybe an impedance matching problem See URL: http://www.kb2ljj.com/data/mic/D-104.htm -- CL -- I doubt, therefore I might be ! wrote in message news:1143474638.836258.56200@v46g2000cwv.googlegroups.com... > Hi All, > > I picked up a D104 Silver Eagle and was observing the output of my > scope. > > I see that it appears to clip out the negative peaks which makes the on > the air sound distorted. I checked the audio with the output > terminated into 100K and also tried various settings and battery > voltage levels. > > Any thoughts? > > de KJ4UO > Article: 96961 of rec.radio.amateur.homebrew From: "Caveat Lector" References: <1143474638.836258.56200@v46g2000cwv.googlegroups.com> Subject: Re: D104 distortion Message-ID: Date: Mon, 27 Mar 2006 08:50:59 -0800 Another thought - the Silver Eagle is an amplified D-104. Bypass the amp and see what you get. A friend had a bad amp in the base of the D-104 -- CL -- I doubt, therefore I might be ! "Caveat Lector" wrote in message news:TCUVf.14386$6a1.5913@fed1read04... > Just a guess -- but maybe an impedance matching problem > See URL: > http://www.kb2ljj.com/data/mic/D-104.htm > > -- > CL -- I doubt, therefore I might be ! > > > > > > > wrote in message > news:1143474638.836258.56200@v46g2000cwv.googlegroups.com... >> Hi All, >> >> I picked up a D104 Silver Eagle and was observing the output of my >> scope. >> >> I see that it appears to clip out the negative peaks which makes the on >> the air sound distorted. I checked the audio with the output >> terminated into 100K and also tried various settings and battery >> voltage levels. >> >> Any thoughts? >> >> de KJ4UO >> > > Article: 96962 of rec.radio.amateur.homebrew From: "Steve Nosko" Subject: Re: 45 MHz IF breakthrough (Ultimate attenuation issues) Date: Mon, 27 Mar 2006 10:21:15 -0600 Message-ID: References: <1jimvb5qzpfuz.eqwrplvmo554$.dlg@40tude.net> > On Thu, 23 Mar 2006 07:50:41 +0000, John Wilkinson > wrote: > > >Hi, > >OK I have a 45MHz crystal filter for my first IF. > >The first LO ranges from 45-75MHz. > >To test I am using a 45.455MHz LO, which is a pll design. > >When I connect up the LO to the mixer, with no input signal I get a -80dBm > >level out of my IF stage!! > >The PLL is clocked off 1MHz ref divided down to 5KHz. The 1MHz ref is a TTL > >signal. Could this be the cause of the problem, and if so how do I get > >around it? > > > >Thanks, > >John. > John, When working toward the best ultimate attenuation (in the stop band) for filters and high gain IF stages in general, you also need to pay attention to ground currents for the input and output of the filter as well as (applying the same principles to) the related stages-- And the stages well before and after the filter. I often say; "A grounds a ground the world around.", but this is a play on words with the old saying "a pound's a pound the world around" as well as a tongue-in-cheek (reverse) reference (more specifically irony) to the fact that an RF ground can be elusive if not properly understood. [[in other words, an RF ground is NOT necessarily an RF ground...or the concept of "any ground in a storm" will NOT "do" for RF ]] Make it so the ground current path for the input has as little in common with the ground current path for the output. DO NOT just make a ground plane and expect it to be better the bigger and more complete it is. Consider ground current exactly as you do the "real" signal path. If the filter has only one ground pin, make separate ground planes for the input and output and have them connect __right at__ the pin...and ONLY _AT_ the pin --- AND from opposite directions. If there are two pins, cut the ground plane so the two pins have NO connection directly between, but only via mass quantities of other routes, via far distant lands from the filter. You must force the ground currents to go where the schematic says they should go as thought you can not use the ground symbol. Any small amount of conductor which has both the input and output ground return currents is a source of coupling. Sometimes MAKING CUTS in a ground plane improves spurious responses---been there--done that. Hope that is clear. However, if the ultimate of the filter is only 50 dB, you're screwed. You need to do what others do, use two or more filters separated by stages, space and, of course, ground. ALSO, random capacitive coupling (technically referred to as "spray" by those in the profession) must be reduced by physical separation and shields. AND don't allow a shields to provide a ground current path that is not following the above ground recommendations. Hope this helps 73, Steve, K9DCI Article: 96963 of rec.radio.amateur.homebrew From: "Tom Holden" References: Subject: Re: 1000+ Members - Group for Radio Shack DX-394 Users Message-ID: <_8VVf.620$u15.160963@news20.bellglobal.com> Date: Mon, 27 Mar 2006 12:19:55 -0500 "Caveat Lector" wrote in message news:giSVf.14367$6a1.6434@fed1read04... > > Just FYI: I see a lot of these mods to increase sensitivity -- resulting > in trashing the dynamic range Which of these mods do you think increase sensitivity at the expense of dynamic range? > Remember some of these mods are made by amateurs Many of whom are electronics professionals. That's not to say that novices at electronics do not carry out some mods. One of the virtues of the DX-394 is that it can be readily modified and doing so is a great educational activity for someone getting into radio and electronics. > The factory engineers designed the sensitivity for very good reasons And made some mistakes in other areas, e.g., decoupling around the IF filters, AGC time constant for SSB (factory corrected in the revised versions), and some design trade-offs or decisions that owners want to correct. That is true of every product. > -- > CL -- I doubt, therefore I might be ! And I was named after the biblical doubter. Tom Article: 96964 of rec.radio.amateur.homebrew From: - exray - Subject: Re: D104 distortion Date: Mon, 27 Mar 2006 13:45:08 -0400 Message-ID: <122g956qcsq04ce@corp.supernews.com> References: <1143474638.836258.56200@v46g2000cwv.googlegroups.com> Caveat Lector wrote: > Another thought - the Silver Eagle is an amplified D-104. > Bypass the amp and see what you get. > A friend had a bad amp in the base of the D-104 > They're also prone to be affected by rf. I had a coiled cord on mine and had to run a direct wire inside the cord from the base to the mic plug to get rid of the rf. -Bill Article: 96965 of rec.radio.amateur.homebrew From: "Caveat Lector" References: <_8VVf.620$u15.160963@news20.bellglobal.com> Subject: Re: 1000+ Members - Group for Radio Shack DX-394 Users Message-ID: Date: Mon, 27 Mar 2006 10:25:03 -0800 I refer you to the Elecraft page http://www.elecraft.com/K2_perf.htm Sez MDS = Minimum Discernible Signal (3db increase above noise floor). Larger negative numbers are generally better, but too much sensitivity can reduce strong signal dynamic range and Ip3. Pre-Amp On MDS numbers of -130 dBm or more are more than adequate for most HF band operating, since band noise is typically above this number. (Lower frequencies need less MDS (more +number) due to an increase in atmospheric noise.) -- CL -- I doubt, therefore I might be ! "Tom Holden" wrote in message news:_8VVf.620$u15.160963@news20.bellglobal.com... > "Caveat Lector" wrote in message > news:giSVf.14367$6a1.6434@fed1read04... >> >> Just FYI: I see a lot of these mods to increase sensitivity -- resulting >> in trashing the dynamic range > > > Which of these mods do you think increase sensitivity at the expense of > dynamic range? > >> Remember some of these mods are made by amateurs > > Many of whom are electronics professionals. That's not to say that novices > at electronics do not carry out some mods. One of the virtues of the > DX-394 is that it can be readily modified and doing so is a great > educational activity for someone getting into radio and electronics. > >> The factory engineers designed the sensitivity for very good reasons > > And made some mistakes in other areas, e.g., decoupling around the IF > filters, AGC time constant for SSB (factory corrected in the revised > versions), and some design trade-offs or decisions that owners want to > correct. That is true of every product. > >> -- >> CL -- I doubt, therefore I might be ! > > And I was named after the biblical doubter. > > Tom > Article: 96966 of rec.radio.amateur.homebrew From: "Norm VE3CZI" Subject: FS: Microphone Element for Working DX Message-ID: Date: Mon, 27 Mar 2006 13:51:11 -0500 I have Mic Elements that came from another piece of Equipment that might be of interest to the HF DXers >Frequency Response has a 10dB rise at 2,000 Hz, which will help to cut >through the DX Pile ups >Freq: 300 Hz to 8000 Hz with 10 dB rise at 2,000 Hz > Has very good Sensitivity >Size: 7/8"L X 9/16"W X 1/4"D >Have had on-the-air reports that this Mic Element has a loss of Lows (ie: >more highs) compared to the Heil HC-5 Capsule. >This Element is used, but has been tested to be operational. SEE The >pictures and Audio Repsonse Graph are listed here. Rear View : http://home.cogeco.ca/~rodemi/images/DX%20Mic%20Capsule%20Rear..SM.jpg Top View : http://home.cogeco.ca/~rodemi/images/DX%20Mic%20Capsule%20Front..SM.jpg Graph: http://home.cogeco.ca/~rodemi/images/Redi-Code%20Capsule%20Plot.jpg PRICE: $15 USD + $5 USD Shipping. Tnx for looking....Norm VE3CZI $VE3CZI$ $at$ %rac.ca% Article: 96967 of rec.radio.amateur.homebrew From: "AAA RF Products" Subject: Coax Connectors & Adapters, new catalog now available Message-ID: Date: Mon, 27 Mar 2006 11:03:08 -0800 For your free copy of our new catalog, please email sales@AAARFProducts.com or see www.aaarfproducts.com or call 949 481 3154 (San Clemente, CA, USA) No minimum order. No handling charges. Article: 96968 of rec.radio.amateur.homebrew From: "Norm VE3CZI" Subject: FS: COMMERCIAL & AMATEUR Service Manuals Message-ID: Date: Mon, 27 Mar 2006 14:08:56 -0500 Have a quantity of Radio Communications Service Manuals, both Commercial & Amateur that I have rescued from the Dumpster. Most ot them are in Like New Condition. Please check my site: www.rodemi.com for what is available. I am updating the site as time allows. I recently retired from the Commercial 2-way radio business and have a "goal" to clean up the Garage & Basement. Thanks for looking....Norm VE3CZI Email me Directly: at rac.ca.... is ve3czi Article: 96969 of rec.radio.amateur.homebrew From: John - KD5YI Subject: Re: Coax Connectors & Adapters, new catalog now available References: Message-ID: Date: Mon, 27 Mar 2006 19:14:37 GMT AAA RF Products wrote: > For your free copy of our new catalog, > > please email sales@AAARFProducts.com > > or see www.aaarfproducts.com > > or call 949 481 3154 (San Clemente, CA, USA) > > No minimum order. > > No handling charges. > > Your prices suck. Article: 96970 of rec.radio.amateur.homebrew From: "Tom Holden" References: <_8VVf.620$u15.160963@news20.bellglobal.com> Subject: Re: 1000+ Members - Group for Radio Shack DX-394 Users Message-ID: Date: Mon, 27 Mar 2006 15:25:52 -0500 "Caveat Lector" wrote in message news:Y5WVf.14396$6a1.13272@fed1read04... >I refer you to the Elecraft page > http://www.elecraft.com/K2_perf.htm > > Sez > MDS = Minimum Discernible Signal (3db increase above noise floor). Larger > negative numbers are generally better, but too much sensitivity can reduce > strong signal dynamic range and Ip3. Pre-Amp On MDS numbers of -130 dBm or > more are more than adequate for most HF band operating, since band noise > is typically above this number. (Lower frequencies need less MDS (more > +number) due to an increase in atmospheric noise.) > > > -- > CL -- I doubt, therefore I might be ! I have no dispute with that. Rather with your first comment: >>> Just FYI: I see a lot of these mods to increase sensitivity -- resulting >>> in trashing the dynamic range >> >> >> Which of these mods do you think increase sensitivity at the expense of >> dynamic range? You did not answer the question. The answer may well be 'none'. I'm not aware of any aimed at increased sensitivity, unless adding an amplified preselector counts as a mod. And that could arguably be for improved dynamic range and sensitivity by improving front-end selectivity and noise figure. Most regard the DX-394 as a very sensitive receiver that is outperformed in that spec by few others. But itcould do with improved overload threshold and IP3. Methinks you might be trashing imagined mods rather than the ones well-documented in the user group. Tom Article: 96971 of rec.radio.amateur.homebrew From: Never anonymous Bud Subject: Re: 1000+ Members - Group for Radio Shack DX-394 Users Message-ID: <06kg229qmd9mikh334mh43qnhsuh3abi6i@4ax.com> References: <81rlf3-v9u.ln1@remote.clifto.com> Date: Mon, 27 Mar 2006 20:54:10 GMT On Mon, 27 Mar 2006 13:29:12 -0600, clifto wrote: >Caveat Lector wrote: >> Just FYI: I see a lot of these mods to increase sensitivity -- resulting in >> trashing the dynamic range >> >> Remember some of these mods are made by amateurs >> >> The factory engineers designed the sensitivity for very good reasons > >Problem is, many times those reasons have more to do with cost than >with performance. My question would be... WHAT does this have to do with scanning, and WHY was it cross-posted to 6 newsgroups?? Lumber Cartel (tinlc) #2063. Spam this account at your own risk. This sig censored by the Office of Home and Land Insecurity... Remove XYZ to email me Article: 96972 of rec.radio.amateur.homebrew From: dxAce Subject: Re: 1000+ Members - Group for Radio Shack DX-394 Users Date: Mon, 27 Mar 2006 15:57:54 -0500 Message-ID: <442851D2.983D961B@milestones.com> References: <81rlf3-v9u.ln1@remote.clifto.com> <06kg229qmd9mikh334mh43qnhsuh3abi6i@4ax.com> Never anonymous Bud wrote: > On Mon, 27 Mar 2006 13:29:12 -0600, clifto wrote: > > >Caveat Lector wrote: > >> Just FYI: I see a lot of these mods to increase sensitivity -- resulting in > >> trashing the dynamic range > >> > >> Remember some of these mods are made by amateurs > >> > >> The factory engineers designed the sensitivity for very good reasons > > > >Problem is, many times those reasons have more to do with cost than > >with performance. > > My question would be... > > WHAT does this have to do with scanning, > and WHY was it cross-posted to 6 newsgroups?? Because the original poster is a Canuck, and doesn't know any better? > > > Lumber Cartel (tinlc) #2063. Spam this account at your own risk. > > This sig censored by the Office of Home and Land Insecurity... > > Remove XYZ to email me Article: 96973 of rec.radio.amateur.homebrew From: "Caveat Lector" References: <81rlf3-v9u.ln1@remote.clifto.com> <06kg229qmd9mikh334mh43qnhsuh3abi6i@4ax.com> Subject: Re: 1000+ Members - Group for Radio Shack DX-394 Users Message-ID: <2yYVf.14403$6a1.1504@fed1read04> Date: Mon, 27 Mar 2006 13:11:33 -0800 Aplogies for the cross posting - I was just responding to the original post'Gotta be more careful -- CL -- I doubt, therefore I might be ! "Never anonymous Bud" wrote in message news:06kg229qmd9mikh334mh43qnhsuh3abi6i@4ax.com... > On Mon, 27 Mar 2006 13:29:12 -0600, clifto wrote: > >>Caveat Lector wrote: >>> Just FYI: I see a lot of these mods to increase sensitivity -- resulting >>> in >>> trashing the dynamic range >>> >>> Remember some of these mods are made by amateurs >>> >>> The factory engineers designed the sensitivity for very good reasons >> >>Problem is, many times those reasons have more to do with cost than >>with performance. > > My question would be... > > WHAT does this have to do with scanning, > and WHY was it cross-posted to 6 newsgroups?? > > > > > > > Lumber Cartel (tinlc) #2063. Spam this account at your own risk. > > This sig censored by the Office of Home and Land Insecurity... > > Remove XYZ to email me Article: 96974 of rec.radio.amateur.homebrew From: "Tom Holden" References: <81rlf3-v9u.ln1@remote.clifto.com> <06kg229qmd9mikh334mh43qnhsuh3abi6i@4ax.com> Subject: Re: 1000+ Members - Group for Radio Shack DX-394 Users Message-ID: Date: Mon, 27 Mar 2006 16:30:01 -0500 "Never anonymous Bud" wrote in message news:06kg229qmd9mikh334mh43qnhsuh3abi6i@4ax.com... > > My question would be... > > WHAT does this have to do with scanning, > and WHY was it cross-posted to 6 newsgroups?? The DX-394 is a scanning receiver, reviews have described its user interface as reflecting a scanner heritage, it has been a topic in all the newsgroups to which I posted the notice, and similar notices have been crossposted a few times in all these newsgroups informing potentially interested parties about http://groups.yahoo.com/group/RADIOSHACKDX394/, without objection. Are there any other newsgroups for which it would be relevant? The ones I posted to are: rec.radio.shortwave, alt.radio.scanner, alt.radio.scanner.uk, rec.radio.amateur.equipment, rec.radio.amateur.homebrew 73, Tom Article: 96975 of rec.radio.amateur.homebrew Subject: Re: Coax Connectors & Adapters, new catalog now available From: Larry References: Message-ID: Date: Mon, 27 Mar 2006 16:47:33 -0500 "AAA RF Products" wrote in news:UDWVf.382 $CL6.69@fed1read11: > For your free copy of our new catalog, > > please email sales@AAARFProducts.com > > or see www.aaarfproducts.com > > or call 949 481 3154 (San Clemente, CA, USA) > > No minimum order. > > No handling charges. > > www.mouser.com You can order ONE resistor, if you like.....3c + shipping...(c; Great prices on millions of parts. I use them all the time. They don't need to spam the internet.... He won't, either, after Cox Cable gets done with him....abuse@cox.net Include this header below...Adios! Send a copy to abuse@giganews.com, too, just for kicks. He's easy to find with his IP ass hangin' out like that (64.58.167.76 in every header). I did...(c; Path: be02!atl-c01.usenetserver.com!news.usenetserver.com!atl- c05.usenetserver.com!news.usenetserver.com!postnews.google.com! news3.google.com!border1.nntp.dca.giganews.com! border2.nntp.dca.giganews.com!nntp.giganews.com!peer01.cox.net!cox.net! p01!fed1read11.POSTED!53ab2750!not-for-mail From: "AAA RF Products" Newsgroups: rec.boats.electronics,rec.radio.amateur.antenna,rec.radio.amateur.homebre w Subject: Coax Connectors & Adapters, new catalog now available Lines: 13 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-RFC2646: Format=Flowed; Original Message-ID: Date: Mon, 27 Mar 2006 11:03:08 -0800 NNTP-Posting-Host: 64.58.167.76 X-Complaints-To: abuse@cox.net X-Trace: fed1read11 1143486068 64.58.167.76 (Mon, 27 Mar 2006 14:01:08 EST) NNTP-Posting-Date: Mon, 27 Mar 2006 14:01:08 EST Organization: Cox Communications Xref: usenetserver.com rec.boats.electronics:159807 rec.radio.amateur.antenna:322471 rec.radio.amateur.homebrew:196504 X-Received-Date: Mon, 27 Mar 2006 14:01:11 EST (be02) Article: 96976 of rec.radio.amateur.homebrew From: Never anonymous Bud Subject: Re: 1000+ Members - Group for Radio Shack DX-394 Users Message-ID: References: <81rlf3-v9u.ln1@remote.clifto.com> <06kg229qmd9mikh334mh43qnhsuh3abi6i@4ax.com> Date: Mon, 27 Mar 2006 22:59:14 GMT On Mon, 27 Mar 2006 16:30:01 -0500, "Tom Holden" wrote: >The DX-394 is a scanning receiver, It is a SHORTWAVE receiver, and any posts about it belong in rec.radio.shortwave and NOT in any scanner newsgroup. It's also NOT amateur equipment any more than it is a scanner, and CERTAINLY not 'homebrew'. >Are there any other newsgroups for which it would be relevant? The ones I >posted to are: >rec.radio.shortwave, alt.radio.scanner, alt.radio.scanner.uk, >rec.radio.amateur.equipment, rec.radio.amateur.homebrew Lumber Cartel (tinlc) #2063. Spam this account at your own risk. This sig censored by the Office of Home and Land Insecurity... Remove XYZ to email me Article: 96977 of rec.radio.amateur.homebrew From: Butch Magee Subject: Re: 1000+ Members - Group for Radio Shack DX-394 Users Date: Mon, 27 Mar 2006 17:42:58 -0600 Message-ID: <122gtjhbdq58m2c@corp.supernews.com> References: Caveat Lector wrote: > Just FYI: I see a lot of these mods to increase sensitivity -- resulting in > trashing the dynamic range > > Remember some of these mods are made by amateurs > > The factory engineers designed the sensitivity for very good reasons Thank you Mr. Lector for reminding the wannabe multi-year experienced EEs that it is best to leave well enough alone. Butch KF5DE Article: 96978 of rec.radio.amateur.homebrew From: "Paul Proefrock" Subject: DSP Speaker Message-ID: Date: Tue, 28 Mar 2006 00:18:28 GMT Does anyone know of a site or info to build a DSP speaker similar to the Hear It by Gap Antenna? Tried Google but in a bazillion pages, don't see any homebrew items. Probably a terminology error ??? Thanks Paul P K0PRP Article: 96979 of rec.radio.amateur.homebrew From: Ted Subject: Re: Eddystone dial and custom dial plates Message-ID: <8h3h22582psr78h3n6iq7q3thdgr628c1d@4ax.com> References: <1143049636.448285.24980@j33g2000cwa.googlegroups.com> <1143321832.545680.142220@g10g2000cwb.googlegroups.com> <1143385239.766015.160760@i39g2000cwa.googlegroups.com> Date: Mon, 27 Mar 2006 20:46:56 -0500 Don (and Dale, if you're still listening), I apologize in advance for not snipping this reply, but I want to preserve the whole thread and file it to my Hints and Kinks folder on the hard drive, for that dial mechanism. Speaking of the Progressive Receiver, I was thinking about building one myself a couple of months ago. At the end of the article in the November '81 QST, Wes shows the math to figure out capacitor values for the VFO. Well, I spreadsheeted that, and I may have found an error. I check for errata on the ARRL site, and didn't find any further references. Everything checks out perfectly until the last step, where he solves for C3. Wes's example yields C3 = 127.02 X 10E-12 F. My values show C3= 355 -(1/50 + 1/126.8) quantity to the -1 power, which is 355 - 35.85 or 319.1 pF, not 127.02 pF. Did I mess up with the math? This is fairly significant to me, because I can see use for this calculation beyond this particular project, never seeming to have the right variable cap on hand. I floated this problem to the local NoGa QRP math gurus, but it turns out I guess we don't have any :) . I didn't really want to put it on qrp_tech. Dale, I've commented to you previously on your magnificent receiver, and Don, that's a nice idea on the dial plate. One thing you could do is design the markings in a drawing program to fit your brass disk, and then iron on a Press-n-Peel image to the brass, and etch it. Then you could apply a layer of black paint to the disk, and carefully wipe it off until only the etched areas remained with paint. Alternatively, If your image is clear enough (reversed this time), you could simply use that after ironing it on, and spray it with a fixative to protect the toner and the brass. A couple of the guys were doing that for panel legends. Some of the guys in the homebrew_pcb Yahoo group have built their own CNC milling machines, and the do their PC boards that way. That would be good for this, as well. 72/73 to you both, Ted KX4OM On 26 Mar 2006 07:00:39 -0800, dkelly42@cox.net wrote: >Well Dale it looks very nice and obviously works well too. I thought I >remembered you saying the Progressive Receiver. I am glad I had a >chance to compliment you. > >Since the subject was the Eddiestone dial I expect that was probably a >chore to install. I usually build homebrew dial chord and drum >mechanisms and more recently use the flange type Jackson Brothers and >Oren Elliot drives. I just figured out a way to make custom dial >plates. Probably an old idea but new to me. > >I just finished a 40M receiver for a SSB transceiver. I thought about >using a small blank CD for the dial plate. What I ended up doing was >getting a piece of brass sheet from ACE Hardware and using a 2 1/4" >hole saw (my chassis panel is 3") I cut a round disc. I had a small >amount of deburring to do but the brass is way tougher than aluminum >and a simple file removed the burrs. The 3/8" drill bit also provided a >true center for the dial plate. I polished it with super fine auto >rubbing compound. I ended up with a nice dial plate. > >I need to mount it to a small shaft section of a vernier capacitor from >Ocean State Electronics. I took a shaft coupler, the type with >removable couplings on both sides, and using very tiny scews mounted >this removable portion of the coupling to the plate. > >Its hard to describe. But I am pleased with myself as I a mechanically >weak. > >This is a good method for making custom dial plates. I had to use a >good chord type drill as my cordless was getting warm. I also mounted >the plate for drilling using two wood screws and fastening the uncut >plate to a scrap 2 x 4 by drilling holes slightly above and below my >cut. > >Now I gotta figure out how to mark the plate. Well maybe I will catch >you on the air sometime Dale. > >K5UOS > >Dale Parfitt wrote: >> wrote in message >> news:1143321832.545680.142220@g10g2000cwb.googlegroups.com... >> >> Dale W4OP, >> > >> > Dale, >> > >> > I believe you posted an e-mail and a link to QRP-L a while back to show >> > your receiver. Should have said this before but better late than never. >> > Nice job. >> > >> > If I remember correctly you used a basic 160M receiver with multiple >> > front end convertors. Also I believe you used blue backlighting? >> > >> > Don, >> > >> > K5UOS >> >> Hi Don, >> Thanks for the kind words. The receiver is based on W7ZOI's Progressive RX >> from the late 80's. To Wes's excellent design I added, >> S meter >> AM detection >> LM386 for loudspeaker w/ tone control >> audio notch filter >> Homebrew 5/2.5/.5 xtal filters >> fast/slow/off AGC >> >> 80M RX with xtal controlled converters for 160/49/40/20/15/10ABC >> The VFO drifts a little over 150Hz in the 1st 5 minutes then settles down to >> +/- 20Hz in a 5 minute period. Wonderful sound and gets more use than the >> PRO II >> 73, >> >> Dale W4OP >> > Article: 96980 of rec.radio.amateur.homebrew From: "Jack Ricci" Subject: Re: 1000+ Members - Group for Radio Shack DX-394 Users Date: Mon, 27 Mar 2006 20:29:17 -0500 Message-ID: References: <81rlf3-v9u.ln1@remote.clifto.com> <06kg229qmd9mikh334mh43qnhsuh3abi6i@4ax.com> The DX-394 is a scanning receiver, reviews have described its user interface as reflecting a scanner heritage... I agree...and I'm a Canuck... "Tom Holden" wrote in message news:tPYVf.772$u15.181036@news20.bellglobal.com... > "Never anonymous Bud" wrote in message > news:06kg229qmd9mikh334mh43qnhsuh3abi6i@4ax.com... >> >> My question would be... >> >> WHAT does this have to do with scanning, >> and WHY was it cross-posted to 6 newsgroups?? > > The DX-394 is a scanning receiver, reviews have described its user > interface as reflecting a scanner heritage, it has been a topic in all the > newsgroups to which I posted the notice, and similar notices have been > crossposted a few times in all these newsgroups informing potentially > interested parties about http://groups.yahoo.com/group/RADIOSHACKDX394/, > without objection. > > Are there any other newsgroups for which it would be relevant? The ones I > posted to are: > rec.radio.shortwave, alt.radio.scanner, alt.radio.scanner.uk, > rec.radio.amateur.equipment, rec.radio.amateur.homebrew > > 73, Tom > Article: 96981 of rec.radio.amateur.homebrew From: "Jack Ricci" Subject: Re: 1000+ Members - Group for Radio Shack DX-394 Users Date: Mon, 27 Mar 2006 20:27:08 -0500 Message-ID: References: <81rlf3-v9u.ln1@remote.clifto.com> <06kg229qmd9mikh334mh43qnhsuh3abi6i@4ax.com> > WHAT does this have to do with scanning, > and WHY was it cross-posted to 6 newsgroups?? I was intrigued by that post and joined the group. DX 394 is quite a bit part of a listening hobby. The DX 394 scans a slightly different breed of frequencies...or does it? My Yupiteru MVT 7100 picks up all those same frequencies also, and then some. Does that mean my Yupi is technically NOT a scanner because I can also use it as an AM/FM/SW/SSB/Weather/TV audio/ CB/Communications/Marine/Police/Fire/Ambulance radio receiver as well? Jack "Never anonymous Bud" wrote in message news:06kg229qmd9mikh334mh43qnhsuh3abi6i@4ax.com... > On Mon, 27 Mar 2006 13:29:12 -0600, clifto wrote: > >>Caveat Lector wrote: >>> Just FYI: I see a lot of these mods to increase sensitivity -- resulting >>> in >>> trashing the dynamic range >>> >>> Remember some of these mods are made by amateurs >>> >>> The factory engineers designed the sensitivity for very good reasons >> >>Problem is, many times those reasons have more to do with cost than >>with performance. > > My question would be... > > WHAT does this have to do with scanning, > and WHY was it cross-posted to 6 newsgroups?? > > > > > > > Lumber Cartel (tinlc) #2063. Spam this account at your own risk. > > This sig censored by the Office of Home and Land Insecurity... > > Remove XYZ to email me Article: 96982 of rec.radio.amateur.homebrew From: Allison-nospam@nouce.bellatlantic.net Subject: Re: Info needed on Motorola 2 tube RF deck Message-ID: References: <3k2g229vv9j81mkoaafq3fc0q19nfe0rfq@4ax.com> Date: Tue, 28 Mar 2006 03:28:35 GMT Dont trash it, find someone that wants it for a repeater or something. Allison On Mon, 27 Mar 2006 16:35:42 -0500, "Ken" wrote: >Thanks Allison for your info. Looks like another one for the trash can. I >figured that the tubes which I figured would do as much as 4CX250s would get >me to 300-500 watts SSB. Oh well we can't get lucky every time. >73, >Ken, WS4V > > > wrote in message >news:3k2g229vv9j81mkoaafq3fc0q19nfe0rfq@4ax.com... >> On Sun, 26 Mar 2006 21:17:17 -0500, "Ken" wrote: >> >>>I have a Motorola amplifier from a working remote base. The only number I >>>can find TLD6612A on the PA deck. It is a two tube, conduction cooled >>>amplifier that was operating on 161 mhz. The tubes are 65-82282D02 (Eimac >>>8560AS I am told is the same tube). I would like to know if anyone has >>>converted one of these PAs to 2 meter SSB and any hints of how to do so. I >>>don't have the manual for the remote base or the PA. >>> >>>Please reply to the group. >>> >>>Thanks guys, >>>Ken >> >> IF it's the one I remember just retune it. For SSB you will have to >> run different bias and accept lower power. The original design ran >> Class C FM and is totally unsuited for SSB without different bias. >> >> As memory serves for FM that was either a 40 or 60W package and >> for SSB you cant run that hard. Also the input power limit was very >> low (well under 1W). >> >> Allison >> >> >> Allison >> > Article: 96983 of rec.radio.amateur.homebrew From: "Tom Holden" References: <81rlf3-v9u.ln1@remote.clifto.com> <06kg229qmd9mikh334mh43qnhsuh3abi6i@4ax.com> Subject: Re: 1000+ Members - Group for Radio Shack DX-394 Users Message-ID: Date: Mon, 27 Mar 2006 22:28:43 -0500 "Never anonymous Bud" wrote in message news:targ22hvqpg1j7i0jsot6mbs8ipt6ktbqn@4ax.com... > On Mon, 27 Mar 2006 16:30:01 -0500, "Tom Holden" > wrote: > >>The DX-394 is a scanning receiver, > > It is a SHORTWAVE receiver, and any posts about it belong > in rec.radio.shortwave and NOT in any scanner newsgroup. It is a LW, MW, SW receiver that scans. Is alt.radio.scanner restricted to discussion of scanning receivers that can tune only above 30 MHz? Do a search in alt.radio.scanner: http://groups.google.com/group/alt.radio.scanner/search?q=DX-394+OR+DX394+or+%22DX+394%22&start=50& - 66 threads found, dating from 1996. > > It's also NOT amateur equipment any more than it is a scanner, > and CERTAINLY not 'homebrew'. Why is the DX-394 NOT amateur equipment (I assume you mean 'amateur radio')? It tunes the HF ham bands and does a credible job receiving the popular ham modes on its own and is used with software to receive many digital modes. It is found in many hamshacks. My first SW receiver was a 5-tube Heathkit AR-3 general coverage radio - it doesn't hold a candle to the DX-394 - but it was the receiving part of my ham radio station. I agree that the DX-394 itself is not 'homebrew' but the many mods are of interest to some homebrewers as have the design discussions carried out in rec.radio.amateur.homebrew. When did you become the self-appointed policer of these newsgroups? As far as I can tell, my original post was in the spirit of guidelines about cross-posting. Your carrying on with this nonsensical criticism by cross-posting replies is not. End of discussion. Tom Article: 96984 of rec.radio.amateur.homebrew From: Dave Hildebrand Subject: Re: Need Info 4 Midland 70-1526B UHF Radio Date: Mon, 27 Mar 2006 20:16:50 -0800 Message-ID: References: Hey -- haven't heard you in a while -- how's Texas? On Mon, 27 Mar 2006, Backfire Bob wrote: > > "Dave Hildebrand" wrote in message > news:Pine.LNX.4.58.0603261916030.26312@torquay.cahuenga.com... > >I recently bought a Midland 70-1526B UHF radio, and I would like greatly > > appreciative of any information on it (e.g. schematic, etc.), including > > where I might find programming software for it. 73s... > > > > ...Dave, N6BHU > > Why would anyone want to help *you*? > > > > Article: 96985 of rec.radio.amateur.homebrew From: "Caveat Lector" References: <1143474638.836258.56200@v46g2000cwv.googlegroups.com> <1143541946.657164.296210@j33g2000cwa.googlegroups.com> Subject: Re: D104 distortion Message-ID: Date: Tue, 28 Mar 2006 07:00:40 -0800 Good advice -- here is a D104 Schematic - Doesn't say Silver Eagle but think it applies http://www.astatic.com/cb/pdf/d104_schematic.pdf Or http://www.ronharter.com/documents/d104_schematic.pdf -- CL -- I doubt, therefore I might be ! "Andrew VK3BFA" wrote in message news:1143541946.657164.296210@j33g2000cwa.googlegroups.com... > OK. Have you checked with varying the settings of the 5k pot in the amp > section? - have you checked that the battery volatge is correct (ie, > measured it?). If that doesnt work, connect your CRO across the mic. > capsule and see if its the cause of the problem..... If its the amp, > shouldnt be too hard to troubleshoot - even if you shotgun replace > EVERY component on the board its a simple job. For schematic, just > Google for it - for some reason, I cant copy the link to this reply. > > Andrew VK3BFA. > Article: 96986 of rec.radio.amateur.homebrew From: "Mike Andrews" Subject: Re: Need info about pyramid antenna and it's performance Date: Tue, 28 Mar 2006 15:57:20 +0000 (UTC) Message-ID: References: <1143541470.722234.301130@e56g2000cwe.googlegroups.com> shan_rish@yahoo.com wrote: > Hi All, > I am a SWL from India and hope to get a ticket soon. I am constructing > a simple receiver and i would like to construct a good antenna for my > receiver and in future for my transmitter as well. I came across a > design in a souvenir released by Hamfest India where an antenna called > "Pyramid Antenna" is described. The author gave reference to one design > published in Radio Magazibe 1982 by Steve Bauer,DJIUS. I came across > another similar design described in > http://www.warc.org.uk/clubmag/qsx13.pdf . I would like to know more > about this antenna and the experience of using it, about it's > performance. My house is near a 11KV power line and my antenna will be > less than 15 feet from the above said power line. While I don't know anything about the pyramid antenna, I do think that I'd want any antenna _MUCH_ farther away from a 11KV power line than 15 feet. That's uncomfortably, even dangerously close. Best of luck on getting your ticket. -- Mike Andrews W5EGO mikea@mikea.ath.cx Tired old sysadmin Article: 96987 of rec.radio.amateur.homebrew From: Allison-nospam@nouce.bellatlantic.net Subject: Re: Simplified G2 Regulator for a 4CX250B amplifier Message-ID: References: <1143533709.809955.34130@u72g2000cwu.googlegroups.com> <1143544844.710948.235190@v46g2000cwv.googlegroups.com> <1143570960.535526.159230@g10g2000cwb.googlegroups.com> Date: Tue, 28 Mar 2006 20:54:31 GMT On 28 Mar 2006 10:36:00 -0800, "MarkAren" wrote: >Hi Tom, > >"I have been toying with the idea of building a 4CX amp for some while >now but keep being put off by the relative complexity of the protection >circuitry associated with G2" > >Basically, just simplification. See >http://www.ifwtech.co.uk/g3sek/boards/tetrode/tetrode-manual.pdf for >the whole of Ian's manual (chosen starting point) > >There is a bunch more protection stuff on the base of the tube, I >forgot to mention this in the posting. I should have also said that the >starting point for the review should be topological. > >I will look at your detailed comments when I wake up (it's 3am :). > >Thanks very much for taking a look. > >Regards, > >Mark. Seems like a lot of effort for 4cx250s, They are common and cheap. I seem to find them new for a few dollars. The screen on that tube needs good regulation for best IMD but I cant remember ever needed "protection" for it. If you maintain the voltage and limit the current in you are ok for most faults other than loss of HV and thats easy to add (lose HV and kill everything circuit). I've seem more 4cx250s and their cousins killed by loss of bias and screen going high that those are the two to prevent. I'm also collecting the bits to build a 6m 4xc250 amp. I'm planning a fairly stiff clamp circuit (zeners and transistor) and simple series resistance to insure not more than max screen power can be dissapated.. Minimal parts. The real effort is power sequencing Fills, Bias, then HV/Screen with an all off if any supply fails. Fuses for overcurrent and protection(diodes) for metering. The HV has to be well filtered so getting enough caps and bleeders to insure decent power is next effort. Allison Article: 96988 of rec.radio.amateur.homebrew From: Ted Subject: Heterodyne Mixer for FFT Spectrum Analyzer Message-ID: Date: Tue, 28 Mar 2006 17:24:20 -0500 I have a PC-based oscilloscope/spectrum analyzer that covers up to 16 MFz. I can see the second harmonic of a 40 meter signal, but that's about the maximum extent of its utility. I recently came across an idea where a set of local oscillators and a mixer could be used to extend the range, with the 0 to 16 MHz input of the FFT SA being the IF, essentially. I can't recall where I saw that, unfortunately. I figure I could use 4 or 5 LOs in a shielded compartment, outputs matched for gains, and switch them into the mixer to produce frequency ranges in 16 MHz increments. I have some wideband MAR-8 MMICs that I could use (attenuated) for the RF to make up for the Mixer loss; i.e., deliver the same signal level I currently get at 50 ohms with 0 to 16 MHz signals. Anyone have any suggestions on this idea? The unit I have is pretty neat, being able to store the o-scope and SA plots digitally, with positionable cursors for readouts of points on the waveforms. 73, Ted KX4OM Article: 96989 of rec.radio.amateur.homebrew From: Allison-nospam@nouce.bellatlantic.net Subject: Re: mixer: DBM or dual gate mosfet? Message-ID: References: <1142934109.266286.184930@e56g2000cwe.googlegroups.com> <9fvv12lkd8qcghig78dcjpitlg2s37bm1k@4ax.com> <1143306639.128205.81900@g10g2000cwb.googlegroups.com> <1143365668.224763.298690@i40g2000cwc.googlegroups.com> <1143467317.326966.226250@e56g2000cwe.googlegroups.com> <1143578181.356316.130880@j33g2000cwa.googlegroups.com> Date: Tue, 28 Mar 2006 23:49:06 GMT On 28 Mar 2006 12:36:21 -0800, "Giancarlo Gian Moda, I7SWX" wrote: > >Hi Allison, > >>From '83 to '93. Had a 6digit number as I was part of CSSE and >central engineering for high end printing systems. I really liked the >Mill. > >Ah..OK CSSE ... I sold a PDP11/10 with a card reader from CSS to the >Italian Goverment as a donation to a University in Peru'...the highest >PDP11 installation on the world at that time...hi CSSS, Somputer Special Systems. CSSE Customer Services Support Engnieering. >> Ah, the plastics fire if memory serves. Never played with any of the >15bit hardware or the controls. Just PDP-8, 10, 11 and VAX. Err, argh, typo on the 15. >>Just finishing up a 85W brick for it now. > > Nice power. On 6 meters I have an FT726 with the 50MHz converter (RX) >supermodified ... the only original pieces are 1x Jfet and 2 IFTs ...hi. >I also have an FT920 a Xmas gift (a few years ago) from my good FRIEND >(with capital letters !!!) Art (and his wife)...hi ;) I have TenTec 6n2 as my commercial radio and 5 homebrew designs each with a different topography. Just for 6m. The nicest one has a -137Dbm mds and a 92db dynamic range with a modest sub 4 db noise figure. Next project is a small single 4CX250 amp for when 20W just doesn't cut it. >>Just talked to him this weekend! He's about 30miles NE of me. Next >net I'll mention you name and say HI.. One of his project was to >restart the old AM nets, he's got maybe 6-8 regulars. > >How nice... Too bad we did not get in touch during my business >quarterly trips in W1 (for confessions with my boss 2000 to 2003...hi). >I was usually at K1GBX house at weekends ... eating lobsters and other >good stuff...hi.When I took my wife and my daugther Luisa for her first >trip we even had a story in a local newspaper and picture...hi >I m sure when you will tell him we had this kbd chatting he will jump >on his chair and get crazy...hi For a jike tell him we had a QSO on 6 >meter SSB... than you will tell him the true story...hi Will do, that will get him going. I figure that will take at least 5 minutes or more for him to wind down. >Yes, amateur radio makes the world really small, some time ... hi > >Sorry for this non Mixers conversation for our friends.... I will >comment on the following... Hey more than a few of us here can help on the subject, it's a pretty big one and Mixers are used everwhere. Later, Allison Kb!GMX Article: 96990 of rec.radio.amateur.homebrew From: Allison-nospam@nouce.bellatlantic.net Subject: Re: Heterodyne Mixer for FFT Spectrum Analyzer Message-ID: References: Date: Tue, 28 Mar 2006 23:52:40 GMT On Tue, 28 Mar 2006 17:24:20 -0500, Ted wrote: >I have a PC-based oscilloscope/spectrum analyzer that covers up to 16 >MFz. I can see the second harmonic of a 40 meter signal, but that's >about the maximum extent of its utility. I recently came across an >idea where a set of local oscillators and a mixer could be used to >extend the range, with the 0 to 16 MHz input of the FFT SA being the >IF, essentially. I can't recall where I saw that, unfortunately. > >I figure I could use 4 or 5 LOs in a shielded compartment, outputs >matched for gains, and switch them into the mixer to produce frequency >ranges in 16 MHz increments. I have some wideband MAR-8 MMICs that I >could use (attenuated) for the RF to make up for the Mixer loss; i.e., >deliver the same signal level I currently get at 50 ohms with 0 to 16 >MHz signals. > >Anyone have any suggestions on this idea? The unit I have is pretty >neat, being able to store the o-scope and SA plots digitally, with >positionable cursors for readouts of points on the waveforms. > >73, >Ted KX4OM Experimental Methods in RF design, ARRL press and some of the handbooks. Basic idea is there you just need to assemble it. Allison Article: 96991 of rec.radio.amateur.homebrew From: safemale Subject: Re: Coax Connectors & Adapters, new catalog now available Date: Tue, 28 Mar 2006 20:01:02 -0500 Message-ID: References: UNLIKE YOU I CAN OVER LOOK A MESSAGE IF I DONT CARE FOR IT and yes i was bellowing at the top of my lungs at you safe male On Mon, 27 Mar 2006 16:47:33 -0500, Larry wrote: >"AAA RF Products" wrote in news:UDWVf.382 >$CL6.69@fed1read11: > >> For your free copy of our new catalog, >> >> please email sales@AAARFProducts.com >> >> or see www.aaarfproducts.com >> >> or call 949 481 3154 (San Clemente, CA, USA) >> >> No minimum order. >> >> No handling charges. >> >> > >www.mouser.com > >You can order ONE resistor, if you like.....3c + shipping...(c; > >Great prices on millions of parts. I use them all the time. > >They don't need to spam the internet.... > >He won't, either, after Cox Cable gets done with him....abuse@cox.net >Include this header below...Adios! >Send a copy to abuse@giganews.com, too, just for kicks. He's easy to >find with his IP ass hangin' out like that (64.58.167.76 in every >header). I did...(c; > > > >Path: be02!atl-c01.usenetserver.com!news.usenetserver.com!atl- >c05.usenetserver.com!news.usenetserver.com!postnews.google.com! >news3.google.com!border1.nntp.dca.giganews.com! >border2.nntp.dca.giganews.com!nntp.giganews.com!peer01.cox.net!cox.net! >p01!fed1read11.POSTED!53ab2750!not-for-mail >From: "AAA RF Products" >Newsgroups: >rec.boats.electronics,rec.radio.amateur.antenna,rec.radio.amateur.homebre >w >Subject: Coax Connectors & Adapters, new catalog now available >Lines: 13 >X-Priority: 3 >X-MSMail-Priority: Normal >X-Newsreader: Microsoft Outlook Express 6.00.2900.2180 >X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 >X-RFC2646: Format=Flowed; Original >Message-ID: >Date: Mon, 27 Mar 2006 11:03:08 -0800 >NNTP-Posting-Host: 64.58.167.76 >X-Complaints-To: abuse@cox.net >X-Trace: fed1read11 1143486068 64.58.167.76 (Mon, 27 Mar 2006 14:01:08 >EST) >NNTP-Posting-Date: Mon, 27 Mar 2006 14:01:08 EST >Organization: Cox Communications >Xref: usenetserver.com rec.boats.electronics:159807 >rec.radio.amateur.antenna:322471 rec.radio.amateur.homebrew:196504 >X-Received-Date: Mon, 27 Mar 2006 14:01:11 EST (be02) Article: 96992 of rec.radio.amateur.homebrew From: Ken Scharf Subject: Re: Eddystone dial References: <1143049636.448285.24980@j33g2000cwa.googlegroups.com> <1143078209.572601.98310@i40g2000cwc.googlegroups.com> Message-ID: Date: Tue, 28 Mar 2006 21:23:17 -0500 w8ji@akorn.net wrote: > Doc wrote: > >>Does anyone in the group have any idea of what an Eddystone dial, Model >>898, is worth. I bought a new one, along with the parts for the Ted >>Crosby HBR receiver many years ago, but never got around to building >>it. The XYL is pushing me to downsize and I need to start somewhere. I >>may have an interested party, but can list it on e-Bay if this falls >>through. I'd like to get some idea of where to start. > > > > If you have all the parts, I'd be interested in them all. I have lots > of dials, but would like to recreate the HBR receiver I built in the > early 60's. > > As for the dial, expect about 30-50 dollars. You might do better, but > most fall in that range. > > 73 Tom > If you are referring to the slide rule dial they are now as rare as hen's teeth. I had one in the junk box that I found at a flea market years ago but never used it. I put it up on ebay and was a bit surprised to get over $100 for it. These dials are prized by HBR builders! Millen also made a few sliderule dials, one used a toothed belt to drive the pointer. Article: 96993 of rec.radio.amateur.homebrew From: "Joel Kolstad" Subject: "Fan" capacitors for microwave RF design Date: Wed, 29 Mar 2006 09:16:04 -0800 Message-ID: <122lg8eg3830g0d@corp.supernews.com> I'm curious... at microwave frequencies often the required capacitance for some matching or tuning network gets down into the "picofaradish" range and it's reasonable to use copper pours to provide that capacitance. Most often these copper pours are in the shape of a fan (see, e.g., the photo in the first page of http://www.downeastmicrowave.com/PDF/PDF10368.pdf -- that guy makes nice stuff!), that is, a quarter-circle. Why that particular shape? My own thoughts are: -- Well, I suppose that where you branch off of a microstrip you'd certainly want a nice gradual transition in pour width, so that leaves you with at least a "triangularish" shape -- A "boxier" shape (either a rectangle or a triangle) probably makes a better patch antenna than something with more curved edges? -- To cover a given area (i.e., to obtain a specified capacitance), a circle of course gives the smallest circumference, hence any resonant (antenna) modes that are created have as high of a frequency as possible (e.g., a circle is the best shape to use to make a copper pour electrically appear as "lumped" as possible at a given frequency) Opinions? Thanks(ish), ---Joel Kolstad Article: 96994 of rec.radio.amateur.homebrew From: fmmck@aol.com (Fred McKenzie) Subject: Re: D104 distortion Date: Wed, 29 Mar 2006 12:53:15 -0500 Message-ID: References: <1143474638.836258.56200@v46g2000cwv.googlegroups.com> <1143541946.657164.296210@j33g2000cwa.googlegroups.com> <1143605408.519641.159140@t31g2000cwb.googlegroups.com> <4P2dnT7VrdV05bfZRVn-uQ@bright.net> In article <4P2dnT7VrdV05bfZRVn-uQ@bright.net>, Scott wrote: > Maybe one of the transistor's biasing network is at fault. I'll assume > the transistors are biased class A, which means the collector voltage > (assuming common emitter circuit) should be at about 1/2 of the supply > voltage. It sounds like one of them might have the collector voltage > running below 1/2 of Vcc. Check the resistor values with an ohmmeter. > Transistors are usually the last thing to replace... Scott & PD- I agree that the transistors are most likely good. If this microphone had a former life connected to a CB set, it may have always had the problem. Resistors would have to drift a long way to cause the problem, but what if one of them was the wrong value to begin with? Perhaps off by a factor of ten? Leakage in the 0.1 capacitor is the next likely suspect. The diagram I downloaded doesn't have a value for one of the resistors. I would guess its value might be between 500K and 1Meg Ohm at the input to the first transistor. Fred Article: 96995 of rec.radio.amateur.homebrew From: Allison-nospam@nouce.bellatlantic.net Subject: Re: Simplified G2 Regulator for a 4CX250B amplifier Message-ID: <6rkl225e8ju5mod2l9qorc2fk0pvuaru71@4ax.com> References: <1143533709.809955.34130@u72g2000cwu.googlegroups.com> <1143544844.710948.235190@v46g2000cwv.googlegroups.com> <1143570960.535526.159230@g10g2000cwb.googlegroups.com> <1143601234.194348.278660@z34g2000cwc.googlegroups.com> Date: Wed, 29 Mar 2006 18:41:00 GMT On 28 Mar 2006 19:00:34 -0800, w8ji@akorn.net wrote: > >Allison-nospam@nouce.bellatlantic.net wrote: >> I'm also collecting the bits to build a 6m 4xc250 amp. I'm planning >> a fairly stiff clamp circuit (zeners and transistor) and simple series >> resistance to insure not more than max screen power can be >> dissapated.. Minimal parts. The real effort is power sequencing >> Fills, Bias, then HV/Screen with an all off if any supply fails. >> Fuses for overcurrent and protection(diodes) for metering. >> The HV has to be well filtered so getting enough caps and bleeders >> to insure decent power is next effort. > > >Actually if you derive screen voltage with a dropping resistor to a >shunt regulator, and set the standing dissipation of the regulator at >rated screen dissipation, there is absolutely no other protection >required. > >All you need to do is have a screen supply that is twice or more the >end voltage you need and that simple shunt circuit and the screen can >NEVER be over dissipated, even with loss of bias and HV. > >The only exception would be a tube that operates with high levels of >negative screen current, but that is a very rare amplifier and not >likely a situation that could be protected by any system. > >73 Tom My hen scratches on paper from 35 years ago had 4cx250s wtih OA2s as regulators and never had problems. If a regulator failed that was bad but even then the tubes were cheap. Negative screen current is best handeled by a shut regulator because if the voltage climbs bad things do happen. Never seen more than a few mA of negative screen and that was well within the range of acceptable dissapation. The 4CX250 is a fairly rugged tube compared to 3CX800 and others. I've seen a few that were abused so bad the plating on the external anode was cooked and the tubes were still within 10%. Plenty of air and watch the screen voltage and plate current and you fine. Allison Article: 96996 of rec.radio.amateur.homebrew From: Eamon Skelton Subject: Re: Simplified G2 Regulator for a 4CX250B amplifier Message-ID: References: <1143533709.809955.34130@u72g2000cwu.googlegroups.com> <1143544844.710948.235190@v46g2000cwv.googlegroups.com> <1143570960.535526.159230@g10g2000cwb.googlegroups.com> <1143601234.194348.278660@z34g2000cwc.googlegroups.com> <6rkl225e8ju5mod2l9qorc2fk0pvuaru71@4ax.com> Date: Wed, 29 Mar 2006 20:17:35 +0100 On Wed, 29 Mar 2006 18:41:00 +0000, Allison-nospam wrote: > The 4CX250 is a fairly rugged tube compared to 3CX800 and others. Just keep a spare handy. As long as you have a spare, the original will never fail. If you sell the spare or give it away, the original tube will die instantly. 73, Ed. EI9GQ. -- Linux 2.6.15 Remove 'X' to reply by e-mail. Yes, my username really is: nospam Article: 96997 of rec.radio.amateur.homebrew From: "Mortimer Schnurd" References: Subject: Re: Need Info 4 Midland 70-1526B UHF Radio Message-ID: <9BBWf.10191$tN3.4682@newssvr27.news.prodigy.net> Date: Wed, 29 Mar 2006 19:53:41 GMT Have Jack Gerritsen look that up for you. I hear he has PLENTY of time to do that these days HAHAHAHA.... Article: 96998 of rec.radio.amateur.homebrew From: Allison-nospam@nouce.bellatlantic.net Subject: Re: Simplified G2 Regulator for a 4CX250B amplifier Message-ID: References: <1143533709.809955.34130@u72g2000cwu.googlegroups.com> <1143544844.710948.235190@v46g2000cwv.googlegroups.com> <1143570960.535526.159230@g10g2000cwb.googlegroups.com> <1143601234.194348.278660@z34g2000cwc.googlegroups.com> <6rkl225e8ju5mod2l9qorc2fk0pvuaru71@4ax.com> Date: Wed, 29 Mar 2006 21:13:48 GMT On Wed, 29 Mar 2006 20:17:35 +0100, Eamon Skelton wrote: >On Wed, 29 Mar 2006 18:41:00 +0000, Allison-nospam wrote: > > >> The 4CX250 is a fairly rugged tube compared to 3CX800 and others. > >Just keep a spare handy. As long as you have a spare, the >original will never fail. If you sell the spare or give >it away, the original tube will die instantly. > >73, Ed. EI9GQ. Ah yes , Edsel Murphy and his laws. Actually I still have five of them. Around here they run from pristine for 20$US to 3$ and they arent hard to find. One caveat, cooking them for a while is advised as they are old unused and could be gassy from sitting. Allison Article: 96999 of rec.radio.amateur.homebrew From: Ted Subject: Re: Heterodyne Mixer for FFT Spectrum Analyzer Message-ID: References: <74dl22h3695fthkg5erl1d62q0pn9arn2k@4ax.com> Date: Wed, 29 Mar 2006 19:19:07 -0500 Gary, OK, that rings a bell. I believe a sig gen was mentioned wherevever it was I saw the idea. The old Heathkit IG-102 is pretty darn stable, but the resolution leaves a bit to be desired. I wouldn't be sweeping it though, just using it as the adjustable LO. It's certainly easy enough to try; I have a few SBL-1's and a return loss bridge. Tnx, Ted KX4OM On Wed, 29 Mar 2006 11:25:33 -0500, Gary Schafer wrote: > >Simplest way is to use a double balanced mixer, like a mini circuits >module, and a signal generator for the LO. Works great. > >73 >Gary K4FMX > >On Tue, 28 Mar 2006 17:24:20 -0500, Ted >wrote: > >>I have a PC-based oscilloscope/spectrum analyzer that covers up to 16 >>MFz. I can see the second harmonic of a 40 meter signal, but that's >>about the maximum extent of its utility. I recently came across an >>idea where a set of local oscillators and a mixer could be used to >>extend the range, with the 0 to 16 MHz input of the FFT SA being the >>IF, essentially. I can't recall where I saw that, unfortunately. >> >>I figure I could use 4 or 5 LOs in a shielded compartment, outputs >>matched for gains, and switch them into the mixer to produce frequency >>ranges in 16 MHz increments. I have some wideband MAR-8 MMICs that I >>could use (attenuated) for the RF to make up for the Mixer loss; i.e., >>deliver the same signal level I currently get at 50 ohms with 0 to 16 >>MHz signals. >> >>Anyone have any suggestions on this idea? The unit I have is pretty >>neat, being able to store the o-scope and SA plots digitally, with >>positionable cursors for readouts of points on the waveforms. >> >>73, >>Ted KX4OM Article: 97000 of rec.radio.amateur.homebrew From: john_c@tpg.com.au (John Crighton) Subject: Ovenaire 1MHz crystal oven. Model sierra-A02375100 Date: Thu, 30 Mar 2006 03:32:06 GMT Message-ID: <442b42d8.16040687@free.teranews.com> Hello All, I am looking for the pin out details on the eight pin connector, a tube style connector, that is fitted to this oven oscillator module. DC in, Oscillator output, that sort of information. Regards, John *** Free account sponsored by SecureIX.com *** *** Encrypt your Internet usage with a free VPN account from http://www.SecureIX.com *** Article: 97002 of rec.radio.amateur.homebrew From: "W3JDR" References: <1143702886.680415.151120@t31g2000cwb.googlegroups.com> Subject: Re: single-ended BJT MIXER design help! Message-ID: <31PWf.11650$Od7.6524@trnddc06> Date: Thu, 30 Mar 2006 11:10:55 GMT There are many, many ways to implement a frequency 'mixer', and the choice of which one to select is based on even more considerations and tradeoffs, so it's a little diccicult to recommend a topology without knowing exactly what the requirements are. However, from your short description, it sounds like you're trying to make a metal detector that works on the principle of an oscillator whose frequency changes when the search head comes into close proximity of a metal object. The way these usually work is that the search head has a rather large inductive coil that is part of an oscillator tuned circuit (usually at a few hundred KHz). The search-headd oscillator frequency is 'mixed' with a fixed oscillator a few KHz different in frequency, producing an audible beat note. When the search head comes near a metal object, the change in the oscillator frequency produces an audible change in the audio beat note. For this type of application you can use a very simple digital 'mixer' since there is no useful information in the amplitude of either mixer input - the only thing that matters is the frequency of the beat note. Assuming that your two oscillator signals can be formed into clean square-wave logic levels, I would suggest an HCMOS exclusive-or gate for this application, followed by a simple RC lowpass filter prior to the audio ampliifier. A little trick you might try is to connect an unused exclusive-or gate as an inverter by connecting one input to the supply. Then connect a large value (100K is fine) from the remaining input to that gate to its output. This will bias the gate into a linear mode and the output DC voltage 'idle' at approx 1/2 Vcc). If you capacitively drive this biased gate with your filtered mixer output, it will have quite a bit of audio gain. You can use the remaining gates as amplifiers in a similar fashion. I'm sure that this thread will produce many other very good suggestions, But this one is simple and pretty idiot-proof. Joe W3JDR "e2" wrote in message news:1143702886.680415.151120@t31g2000cwb.googlegroups.com... > please help me with my design on metal detector.i need to mix my two > sine inputs(few hundreds of KHz)and extract their difference.i opted > for the bjt.my questions are: > > 1.biasing > -- using the buil-in transistor of lm389,how do i bias it such that > it operate in "mixing" mode? > > 2.diode-based > -- can u share any other simple circuit to implement a mixer in the > low frequency range? > > > thanks!!!! > Article: 97003 of rec.radio.amateur.homebrew From: "Brian Murrey" Subject: Surplus Junkbox Parts Message-ID: Date: Thu, 30 Mar 2006 14:01:01 GMT I have moved my surplus junkbox parts to my new website. If you need anything, just let me know. A complete listing, that changes about once a week, is now online. http://www.hamradparts.com 73 de KB9BVN Brian Murrey Article: 97004 of rec.radio.amateur.homebrew From: "Joel Kolstad" Subject: Re: "Fan" capacitors for microwave RF design Date: Thu, 30 Mar 2006 09:36:52 -0800 Message-ID: <122o5rn79kgus9c@corp.supernews.com> References: <122lg8eg3830g0d@corp.supernews.com> <1143725834.219939.126950@t31g2000cwb.googlegroups.com> Hi Steve, wrote in message news:1143725834.219939.126950@t31g2000cwb.googlegroups.com... > Don't think of these things as capacitors. They are really a version > of an open-ended quarter-wave transmission line stub. Ah, thanks, I didn't realize people really were treating them as being distributed instead of lump! (Since using copper pours as lumped capacitors is certainly reasonable at lower frequencies.) > A search on "radial stub" is likely to turn up more info (though I > haven't tried it). The first hit is pretty good (now that you're given me the correct search term) -- the Microwaves 101 web site, http://www.microwaves101.com/encyclopedia/quarterwave.cfm. ---Joel Article: 97005 of rec.radio.amateur.homebrew From: John Wilkinson Subject: Chokes on digital supplies Date: Thu, 30 Mar 2006 19:26:17 +0100 Message-ID: <18f0wz6jnf5c4.1g0kwod5jfsop$.dlg@40tude.net> Hi, If I have a few TTL chips on the same PCB as all my PLL's (see previous threads). Would it be a good idea to put a little choke in the supply line up against each TTL chip, with cap decoupling either side? What about 100uH and 2 100nF? Will that reduce any noise problems I have? Thanks, John. Article: 97006 of rec.radio.amateur.homebrew From: "Steve Nosko" Subject: Re: Chokes on digital supplies Date: Thu, 30 Mar 2006 14:22:35 -0600 Message-ID: References: <18f0wz6jnf5c4.1g0kwod5jfsop$.dlg@40tude.net> I don't believe chokes should be necessary. Good 0.1 or 0.01 at each package should be enough. Parallel bypass caps is not a good idea because the larger one will go inductive above its self resonant freq and resonate with the other creating a parallel resonant, high impedance "non-bypass". HOWEVER... Make sure your ground paths are isolated from each other. The digital chip ground path should have nothing in common with the VCO and Phase Det grounds. The VCO is extremely sensitive to any voltage variations between ground and its supply and if you have ground variations and a good supply, it is just like power supply ripple. All the digital grounds should go directly back to the supple input to the board and the analog grounds the same and this must be two completely isolated paths. Sometimes *cutting* ground paths around a VCO improves spurs. GOOD: VCO GND -----------------------\ \ -Supply GND / / TTL GND ----------------------- BAD: VCO GND --\ This run *HAS* impedance and \ voltage drop in the form of pulses. ----------------------Supply GND / And there fore modulates the VCO. / TTL GND -- 73, Steve, K9DCI "John Wilkinson" wrote in message news:18f0wz6jnf5c4.1g0kwod5jfsop$.dlg@40tude.net... > Hi, > If I have a few TTL chips on the same PCB as all my PLL's (see previous > threads). Would it be a good idea to put a little choke in the supply line > up against each TTL chip, with cap decoupling either side? > > What about 100uH and 2 100nF? > > Will that reduce any noise problems I have? > > Thanks, > John. Article: 97007 of rec.radio.amateur.homebrew From: "Steve Nosko" Subject: Re: "Fan" capacitors for microwave RF design Date: Thu, 30 Mar 2006 14:42:24 -0600 Message-ID: References: <122lg8eg3830g0d@corp.supernews.com> Call him. The phone number is right there. There are most likely 10GHz bypasses. It's hard to tell from the pix. They are all in the center of another line going to two places and all the same size. 73, Steve, K9DCI "Joel Kolstad" wrote in message news:122lg8eg3830g0d@corp.supernews.com... > I'm curious... at microwave frequencies often the required capacitance for > some matching or tuning network gets down into the "picofaradish" range and > it's reasonable to use copper pours to provide that capacitance. Most often > these copper pours are in the shape of a fan (see, e.g., the photo in the > first page of http://www.downeastmicrowave.com/PDF/PDF10368.pdf -- that guy > makes nice stuff!), that is, a quarter-circle. Why that particular shape? My > own thoughts are: > > -- Well, I suppose that where you branch off of a microstrip you'd certainly > want a nice gradual transition in pour width, so that leaves you with at least > a "triangularish" shape > -- A "boxier" shape (either a rectangle or a triangle) probably makes a better > patch antenna than something with more curved edges? > -- To cover a given area (i.e., to obtain a specified capacitance), a circle > of course gives the smallest circumference, hence any resonant (antenna) modes > that are created have as high of a frequency as possible (e.g., a circle is > the best shape to use to make a copper pour electrically appear as "lumped" as > possible at a given frequency) > > Opinions? > > Thanks(ish), > ---Joel Kolstad > > Article: 97008 of rec.radio.amateur.homebrew From: Chris Jones Subject: Re: Chokes on digital supplies Date: Thu, 30 Mar 2006 23:49:43 +0100 Message-ID: <122okj2rncm36a5@corp.supernews.com> References: <18f0wz6jnf5c4.1g0kwod5jfsop$.dlg@40tude.net> Steve Nosko wrote: > I don't believe chokes should be necessary. Good 0.1 or 0.01 at each > package should be enough. Parallel bypass caps is not a good idea because > the larger one will go inductive above its self resonant freq and resonate > with the other creating a parallel resonant, high impedance "non-bypass". > > > HOWEVER... > > Make sure your ground paths are isolated from each other. The digital > chip ground path should have nothing in common with the VCO and Phase Det > grounds. The VCO is extremely sensitive to any voltage variations between > ground and its supply and if you have ground variations and a good supply, > it is just like power supply ripple. > All the digital grounds should go directly back to the supple input to > the board and the analog grounds the same and this must be two completely > isolated paths. > > Sometimes *cutting* ground paths around a VCO improves spurs. > > > GOOD: > > VCO GND -----------------------\ > \ > -Supply GND > / > / > TTL GND ----------------------- > > > BAD: > > VCO GND --\ This run *HAS* impedance and > \ voltage drop in the form of pulses. > ----------------------Supply GND > / And there fore modulates the VCO. > / > TTL GND -- > > > 73, Steve, K9DCI > > > "John Wilkinson" wrote in message > news:18f0wz6jnf5c4.1g0kwod5jfsop$.dlg@40tude.net... >> Hi, >> If I have a few TTL chips on the same PCB as all my PLL's (see previous >> threads). Would it be a good idea to put a little choke in the supply >> line up against each TTL chip, with cap decoupling either side? >> >> What about 100uH and 2 100nF? >> >> Will that reduce any noise problems I have? >> >> Thanks, >> John. There are two schools of thought on RF grounding of mixed analogue and digital circuits. I have always had good results with a single, complete ground *plane* for all of the analogue and digital circuitry, and separate supplies with their own regulators near the loads (or at least their own decoupling), for the noisy blocks and the sensitive blocks. Others may say that what I do doesn't work for them, but it has worked for me. Chris Article: 97009 of rec.radio.amateur.homebrew From: "Joel Kolstad" Subject: Re: "Fan" capacitors for microwave RF design Date: Thu, 30 Mar 2006 14:14:45 -0800 Message-ID: <122om54kvdl7k8c@corp.supernews.com> References: <122lg8eg3830g0d@corp.supernews.com> "Steve Nosko" wrote in message news:e0hfrg$flt$2@engnntp2.cig.mot.com... > Call him. The phone number is right there. I kinda prefer the approach on Usenet here where's it's completely voluntary for people to read your question and provide answers (and there have been a couple good ones). I met Steve (of Down East Microwave) a couple years ago at Microwave Update in Seattle... great guy! Article: 97011 of rec.radio.amateur.homebrew From: "Steve Nosko" Subject: Re: BJT MIXER QUESTION: should it be used as non-llinear mode or switching mode? Date: Fri, 31 Mar 2006 09:31:00 -0600 Message-ID: References: <1143778450.128789.250920@u72g2000cwu.googlegroups.com> Just make sure one signal is large enough to drive the device well into it's non-linear region. 73, Steve, K9DCI "e2" wrote in message news:1143778450.128789.250920@u72g2000cwu.googlegroups.com... > very simple application..i have two input frequencies and would like to > use single-fed bjt transistor to get a difference frequency... > any other design recommendation is highly appreciated......thanks! > Article: 97012 of rec.radio.amateur.homebrew From: "Deadman Walking" References: <1143821165.443067.147440@e56g2000cwe.googlegroups.com> Subject: Re: The weeekly FAQ - What Is Ham Radio? Message-ID: Date: Fri, 31 Mar 2006 16:50:16 GMT Can't you tell its Friday same old s++t of the poor sod. He needs help got a number he can contact. The Dead Man Article: 97013 of rec.radio.amateur.homebrew From: Paul Keinanen Subject: Re: mixer: DBM or dual gate mosfet? Message-ID: References: <1142934109.266286.184930@e56g2000cwe.googlegroups.com> <9fvv12lkd8qcghig78dcjpitlg2s37bm1k@4ax.com> <1143306639.128205.81900@g10g2000cwb.googlegroups.com> <1143365668.224763.298690@i40g2000cwc.googlegroups.com> <1143467317.326966.226250@e56g2000cwe.googlegroups.com> <1143578181.356316.130880@j33g2000cwa.googlegroups.com> Date: Fri, 31 Mar 2006 22:39:29 +0300 On 28 Mar 2006 12:36:21 -0800, "Giancarlo Gian Moda, I7SWX" wrote: >Ah..OK CSSE ... I sold a PDP11/10 with a card reader from CSS to the >Italian Goverment as a donation to a University in Peru'...the highest >PDP11 installation on the world at that time...hi By the way, did you have to install extra fans to compensate for the low air density (and thus lower heat carrying capacity) at high altitudes ? Some electronic systems have quite low maximum altitude ratings due to this. The low air density might also cause problems for amateur radio equipment if operated at full power at high altitudes. Paul OH3LWR Article: 97014 of rec.radio.amateur.homebrew From: "Brian Murrey" Subject: Another Parts Update Message-ID: Date: Fri, 31 Mar 2006 22:50:16 GMT I have moved my junkbox surplus stuff to a new website. http://www.hamradparts.com 1N4148 Diodes $3.00 for 100, $4.00 for 200 1N4007 - 1 Amp General Purpose Rectifier Diodes - $3.00 for 50 1500pf NPO Caps, SMT 0805, 50V - $3.00 for 100 3300pf NPO Caps, SMT 0805, 25V - $3.00 for 100 220pf NPO Caps, SMT 0805, 50V - $3.00 for 100 150pf NPO Caps, SMT 0805, 50V - $3.00 for 100 2N3704 NPN TO92 - 20 for $2.00 2N2907 PNP TO92 Package - $4.00 for 50 2N3904 NPN TO92 Package - $4.00 for 50 2N2222 NPN TO18 (metal) Package - 5 for $1.00 MMBT4403 PNP SMT transistor - 50 for $4.00 2N2222 NPN TO92 Package - $4.00 for 50 The 2N2222 is a bulk transistor...meaning the part is not labeled. They ship in a Zip Lock packet and the packet is clearly labeled. 2N3906 PNP TO92 Package - $4.00 for 50 The 2N3906 is a bulk transistor...meaning the part is not labeled. They ship in a Zip Lock packet and the packet is clearly labeled. 2SC2166 - RF AMP TO220 (8 left) - $4.50 each IRF510 - MOSFET AMP TO220 - 5 for $1.00 3.575611 Mhz HC49 Crystals - 5 for $2.00 4.9152 Mhz HC49 Crystals - 10 for $3.00 9.830 Mhx Crystals (SS@ package) - 10 for $3.00 LM386N-1 Audio Amp - 6 for $5.00 LM7805ACV 5v Positive Voltage Regulators (TO220) 5 for $2.00 Sticky Back Rubber Feet for your projects, self adhesive - 8 to a strip - 2 Strips for $1.00 Panasonic Wall Warts - 12VDC, 500mA (center negative) $6.00 each If you need center positiove, cut off the end and reverse it. I use these to power my rock mites, my TT2, and all of my homebrew test gear. NON-SMT Capacitors: 50 for $3.00 ======================================= 8pf NPO Ceramic 11pf NPO Ceramic 12pf NPO Ceramic 22pf Ceramic 470pf Ceramic 560pf Ceramic .1 uF (104J) Ceramic Cash or Check or Money Order only. Prices includes USA shipping, minimum order is $5.00, otherwise add a buck for shipping. Will ship DX, email for details. Brian Murrey 47 Grassy Drive New Whiteland IN 46184 73 de KB9BVN Article: 97015 of rec.radio.amateur.homebrew From: "Jim, KK1W" Subject: FA: Two 6 position coax switches & other stuff Message-ID: <90oXf.86$qP2.48@fe02.lga> Date: Sat, 1 Apr 2006 00:15:48 -0500 Ending tomorrow, reasonable minimums, good feedback rating. Two 6 position coax switchs, assortement of IC's including XR's and even some FRS talkies. http://search.ebay.com/_W0QQsassZkk1w2000 Thanks for looking, Jim, KK1W