Article: 100458 of rec.radio.amateur.boatanchors From: "Bri" Subject: Re: AR88s and PCBs Date: Tue, 1 Nov 2005 08:50:27 +0000 (UTC) Message-ID: References: Because the oil has leaked everywhere... "Brian Goldsmith" wrote in message news:zfy9f.5622$Hj2.1670@news-server.bigpond.net.au... > > "Dday" wrote > > Why would you want to replace the oil capacitors anyways? > > They are still good. They have lasted 60 years and they will undoubtedly > outlast us both. > > > > ****Reread the OP original posting," I have 2 such sets, one of which is > weeping like a baby". They are obviously NOT good. > > Brian Goldsmith. > > Article: 100459 of rec.radio.amateur.boatanchors From: Michael Crestohl Subject: FS:Double Fan Blower for Amp Builders... Message-ID: <17kem1trg4n99814iti2jnftood19upc65@4ax.com> Date: Tue, 01 Nov 2005 13:23:47 GMT I have a very nice REDMOND Model number 9107115 VAC 60 cycle double blower cooling fan for sale. It runs at 1570 RPM and should keep anything you can build nice and cool. My father-in-law bought it for an amplifier he was building but he passed away before completing it. I am asking $15.00 plus shipping for it. If interested please reply by e-mail. Photo available on request. If interested please reply by e-mail. My address has been obscured to try to prevent spamming. Tnx es 73, Michael, W1RC w1rc*at*verizon*dot*com Article: 100460 of rec.radio.amateur.boatanchors From: Michael Crestohl Subject: FS: Collins 30L-1 Amplifier Manual (Copy) Message-ID: Date: Tue, 01 Nov 2005 13:23:47 GMT Hi Gang: I have an excellent copy of the Instruction Book for the Collins 30L-1 amplifier that is surplus to my needs. It is the 2nd Edition dated 15 June 1961. It is an excellent copy with the full pull-out schematic, and hardly distinguishable from an original. I am asking $5.00 plus postage. If interested please reply by e-mail. My address has been obscured to try to prevent spamming. Tnx es 73, Michael, W1RC w1rc*at*verizon*dot*com Article: 100461 of rec.radio.amateur.boatanchors From: Michael Crestohl Subject: FS: Drake R-4 Receiver Manual (Copy) Message-ID: Date: Tue, 01 Nov 2005 13:23:47 GMT Hi Gang: I have an excellent copy of the 35 page Instruction Manual for the R L Drake R-4 Receiver that is surplus to my needs. The cover is slightly "wavy" and slightly blemished but the manual copy is a very good one and is hardly distinguishable from an original. It is bound at the top with a couple of tie wraps which makes it easy to flip through and look at while working on the radio. I am asking $5.00 plus postage. If interested please reply by e-mail. My address has been obscured to try to prevent spamming. Tnx es 73, Michael, W1RC w1rc*at*verizon*dot*com Article: 100463 of rec.radio.amateur.boatanchors From: Randy or Sherry Guttery Subject: Re: Old Xmtrs, "Ancient Modulation" and Amps References: <67s9f.5159$Kv.2172@newssvr22.news.prodigy.net> <26D9f.23096$wG.19786@bignews4.bellsouth.net> Message-ID: <8sL9f.42077$Pp1.37056@bignews3.bellsouth.net> Date: Tue, 01 Nov 2005 09:04:35 -0600 Chuck Harris wrote: > If you are going to couch the question that way, the answer is > none. This was in response to the previous discussion of the fact there is no standards for S unit meters (i.e. there are reports of S Units being anywhere from 1-6db/S unit - with 6db having been a proposed (but failed) standard - and 5db/S unit seeming to be common in modern (SSB) rigs. Someone mentioned that military gear using "S meters" were calibrated to 6dB/S unit. I'm not familiar (in spite of being married to a boatanchor collector with a fair number of pieces of gear) with any "native" mil gear with S meters - which you pretty much confirm above. Since that individual noted mil gear with calibrated S meters - I was exploring that question. As I noted - it wouldn't surprise me to learn that some modern (post 1980) mil gear has S meters... Hence the "couched" question. best regards... -- randy guttery A Tender Tale - a page dedicated to those Ships and Crews so vital to the United States Silent Service: http://tendertale.com Article: 100464 of rec.radio.amateur.boatanchors From: "Mike Andrews" Subject: Re: Old Xmtrs, "Ancient Modulation" and Modern Amps Date: Tue, 1 Nov 2005 15:06:39 +0000 (UTC) Message-ID: References: <_xs9f.500$0d.147@trnddc08> <%zz9f.346$7d.162@trnddc01> Lazy Senior wrote: > Mike Andrews wrote: >> The FCC thinks it's valid. Whether or not it's in QRZ.com is irrelevant. > Hmmm, a new nocoder vanity call? No, most tech lites I know have common > sense, Uncle Peter acts like an Extra......... THat's because he's an Extra. I'm not sure where you're getting your data, but the FCC has this for Peter: Licensee Name BERTINI, PETER J Operator Class Amateur Extra You _could_ have looked it up for yourself. -- Mike Andrews, W5EGO mikea@mikea.ath.cx Tired old sysadmin Article: 100465 of rec.radio.amateur.boatanchors From: "Bob Spooner" Subject: Re: Good source for Service Manuals Date: Tue, 1 Nov 2005 10:20:35 -0500 Message-ID: References: <64mcm15hsoke8tjarl2p8v4u3aaaqqg2k4@4ax.com> Fred, Thanks for your reply. Yes, I tried there. I was able to get an operating manual for the TS-700S, but nothing for the newer SP, which is what I have. 73, Bob AD3K "FredSmith" wrote in message news:64mcm15hsoke8tjarl2p8v4u3aaaqqg2k4@4ax.com... > Have you tried finding one at http://www.mods.dk ? > > > > On Mon, 31 Oct 2005 10:12:39 -0500, "Bob Spooner" > wrote: > Article: 100466 of rec.radio.amateur.boatanchors From: "Bob Spooner" Subject: Re: Good source for Service Manuals Date: Tue, 1 Nov 2005 10:22:03 -0500 Message-ID: References: Thanks. 73, Bob AD3K " Uncle Peter" wrote in message news:l_A9f.42592$fE5.25277@fed1read06... > > "Bob Spooner" wrote in message > news:dk5c98$1cbk$1@f04n12.cac.psu.edu... > > I am looking for a service manual for a rig I acquired. I've found > listings > > for it at the following places: > > > > Ham Radio Manuals by WB2JKJ - Icom Yaesu Kenwood Heathkit Drake and more! > > > > Amateur Radio products and equipment by rossdist.com > > > > Vintage Manuals, Inc. Catalog > > > > Manual Mall: Owners and Technical Manuals for Manufacturers JA - KX > > > > Has anyone had experience with any of these, and if so, which would you > > recommend? > > > > 73, > > Bob AD3K > > > > > > Bob > > I've had good luck with the Manual Man. www.manualman.com. > > Regards > > Pete > > Article: 100467 of rec.radio.amateur.boatanchors From: William Mutch Subject: BC-221 as VFO ?? Date: Tue, 1 Nov 2005 10:48:03 -0500 Message-ID: At last spring AWA meet I picked up a homebrew novice transmitter of unknown provanence. It has a close resembleance to the one in the 1976 Handbook (except that it uses an electron coupled 12BY7 instead of a 6DK7) and was built by a fine craftsman who did a first rate job on it. The previous owner got it at an estate sale and didn't know who built it. Last weekend I got around to bringing it slowly up to working voltage on a variac and tuning it into a dummy load with a variety of Xtals. The 6146B final will deliver between 40 and 60 watts to the load on 80, 40 and 20, but I had to stop testing before I got up to 15 meters as my Tek 922 scope expired. Since the rig will deliver power to both 40 and 20 I thought to see if I can put it on 30 meters, but I haven't any Xtals which will multiply into the band. I thought about using my BC-221 as a VFO. Will the BC-221 provide enough volts out to stabilize the xtal oscillator ?? What would be the best way to cable from the output of the BC-221 (some previous owner added a pl-259) to the xtal socket of the rig ?? It sees a 47K resistor to ground from the grid and is DC blocked by a capacitor. I need to assure myself that the BC-221 will not be damaged. Has anyone ever done this ?? Article: 100468 of rec.radio.amateur.boatanchors From: "Steve" References: Subject: Re: BC-221 as VFO ?? Message-ID: Date: Tue, 01 Nov 2005 15:54:22 GMT Its been many years since I've owned a BC-221, but I remember that they were very harmonic 'rich'. Thats OK for a freq meter, not so good for a VFO. Might be worth taking a look at before putting it on the air. Steve William Mutch wrote in message news:MPG.1dd158419dedb308989848@newsstand.cit.cornell.edu... > At last spring AWA meet I picked up a homebrew novice transmitter > of unknown provanence. It has a close resembleance to the one in the > 1976 Handbook (except that it uses an electron coupled 12BY7 instead of > a 6DK7) and was built by a fine craftsman who did a first rate job on > it. The previous owner got it at an estate sale and didn't know who > built it. > > Last weekend I got around to bringing it slowly up to working > voltage on a variac and tuning it into a dummy load with a variety of > Xtals. The 6146B final will deliver between 40 and 60 watts to the load > on 80, 40 and 20, but I had to stop testing before I got up to 15 meters > as my Tek 922 scope expired. > Since the rig will deliver power to both 40 and 20 I thought to > see if I can put it on 30 meters, but I haven't any Xtals which will > multiply into the band. I thought about using my BC-221 as a VFO. > > > Will the BC-221 provide enough volts out to stabilize the xtal > oscillator ?? > > What would be the best way to cable from the output of the BC-221 > (some previous owner added a pl-259) to the xtal socket of the rig ?? > It sees a 47K resistor to ground from the grid and is DC blocked by a > capacitor. > > I need to assure myself that the BC-221 will not be damaged. > > Has anyone ever done this ?? Article: 100469 of rec.radio.amateur.boatanchors From: et472@FreeNet.Carleton.CA (Michael Black) Subject: Re: BC-221 as VFO ?? Date: 1 Nov 2005 16:04:35 GMT Message-ID: References: William Mutch (wcm1@NOSPAM.cornell.edu) writes: > At last spring AWA meet I picked up a homebrew novice transmitter > of unknown provanence. It has a close resembleance to the one in the > 1976 Handbook (except that it uses an electron coupled 12BY7 instead of > a 6DK7) and was built by a fine craftsman who did a first rate job on > it. The previous owner got it at an estate sale and didn't know who > built it. > > Last weekend I got around to bringing it slowly up to working > voltage on a variac and tuning it into a dummy load with a variety of > Xtals. The 6146B final will deliver between 40 and 60 watts to the load > on 80, 40 and 20, but I had to stop testing before I got up to 15 meters > as my Tek 922 scope expired. > Since the rig will deliver power to both 40 and 20 I thought to > see if I can put it on 30 meters, but I haven't any Xtals which will > multiply into the band. I thought about using my BC-221 as a VFO. > > > Will the BC-221 provide enough volts out to stabilize the xtal > oscillator ?? > > What would be the best way to cable from the output of the BC-221 > (some previous owner added a pl-259) to the xtal socket of the rig ?? > It sees a 47K resistor to ground from the grid and is DC blocked by a > capacitor. > > I need to assure myself that the BC-221 will not be damaged. > > Has anyone ever done this ?? I can't help you with specifics, but it was definitely done. I can picture an article in CQ from the late fifties or early sixties that used a BC-221 as a VFO, though that might have been an SSB rig. Old books would describe how to couple a VFO into a crystal socket. There was often a coupling network right at the crystal socket. Michael VE2BVW Article: 100470 of rec.radio.amateur.boatanchors From: "Caveat Lector" References: Subject: Re: Good source for Service Manuals Message-ID: Date: Tue, 1 Nov 2005 08:06:28 -0800 Lots to choose from (Free and Pay) at URL: http://ac6v.com/manuals.htm -- CL -- I doubt, therefore I might be ! Article: 100471 of rec.radio.amateur.boatanchors From: "Bob Spooner" Subject: Re: Good source for Service Manuals Date: Tue, 1 Nov 2005 11:56:08 -0500 Message-ID: References: Thanks. 73, Bob AD3K "Caveat Lector" wrote in message news:OnM9f.15935$i%.14232@fed1read07... > > Lots to choose from (Free and Pay) at URL: > > http://ac6v.com/manuals.htm > -- > CL -- I doubt, therefore I might be ! > > > Article: 100472 of rec.radio.amateur.boatanchors From: "Dday" References: Subject: Re: BC-221 as VFO ?? - yes Message-ID: Date: Tue, 01 Nov 2005 17:03:31 GMT 1947 RADIO Handbook ( not ARRL ) has construction detail on using 221 as vfo . 6AG7 as driver etc. "William Mutch" wrote in message news:MPG.1dd158419dedb308989848@newsstand.cit.cornell.edu... > At last spring AWA meet I picked up a homebrew novice transmitter > of unknown provanence. It has a close resembleance to the one in the > 1976 Handbook (except that it uses an electron coupled 12BY7 instead of > a 6DK7) and was built by a fine craftsman who did a first rate job on > it. The previous owner got it at an estate sale and didn't know who > built it. > > Last weekend I got around to bringing it slowly up to working > voltage on a variac and tuning it into a dummy load with a variety of > Xtals. The 6146B final will deliver between 40 and 60 watts to the load > on 80, 40 and 20, but I had to stop testing before I got up to 15 meters > as my Tek 922 scope expired. > Since the rig will deliver power to both 40 and 20 I thought to > see if I can put it on 30 meters, but I haven't any Xtals which will > multiply into the band. I thought about using my BC-221 as a VFO. > > > Will the BC-221 provide enough volts out to stabilize the xtal > oscillator ?? > > What would be the best way to cable from the output of the BC-221 > (some previous owner added a pl-259) to the xtal socket of the rig ?? > It sees a 47K resistor to ground from the grid and is DC blocked by a > capacitor. > > I need to assure myself that the BC-221 will not be damaged. > > Has anyone ever done this ?? Article: 100473 of rec.radio.amateur.boatanchors From: "Bri" Subject: Re: AR88s and PCBs Date: Tue, 1 Nov 2005 17:49:04 +0000 (UTC) Message-ID: References: <9KydnSgamOag5PreRVn-hQ@rcn.net> Thanks for that Chuck. However it still leaves the problem of potential PCB contamination: did they, or did they not use PCB's? If it is just mineral oil then there is no problem, I'll either refill, or more likely remove and replace with modern capacitors inside the can. It's the potential for PCB poisoning that concerns me most at the moment. Bri "Chuck Harris" wrote in message news:9KydnSgamOag5PreRVn-hQ@rcn.net... > Bri wrote: >> Because the oil has leaked everywhere... >> >> >> >> "Brian Goldsmith" wrote in message >> news:zfy9f.5622$Hj2.1670@news-server.bigpond.net.au... >> >>>"Dday" wrote >>> >>>Why would you want to replace the oil capacitors anyways? >>> >>>They are still good. They have lasted 60 years and they will undoubtedly >>>outlast us both. >>> >>> >>> >>>****Reread the OP original posting," I have 2 such sets, one of which is >>>weeping like a baby". They are obviously NOT good. >>> >>>Brian Goldsmith. > > clean them up, with naptha, replace the lost oil (mineral oil is fine), > and replace the damaged rubber seals with a good quality silicone sealant, > and the capacitor will go another generation...assuming that it didn't > already arc over. > > Oil capacitors have paper as part of the dielectric, but the paper isn't > where the characteristics of the capacitor come from, it is the oil. > The paper is just a convenient separator for the plates. > > -Chuck Article: 100474 of rec.radio.amateur.boatanchors From: AndyB Subject: Re: AR88s and PCBs References: Message-ID: <9pO9f.36876$m%6.22053@fe3.news.blueyonder.co.uk> Date: Tue, 01 Nov 2005 18:24:05 GMT Bri wrote: > I noticed some concern as to the possibility (let's not put it any stronger > than that) of PCB's (polychlorinated biphenyls) being used in the oil filled > capacitors of RCA AR88's. I have 2 such sets, one of which is weeping like > a baby. I intend to replace the old capacitors with modern equivalents > inside the old cans. Is it really likely to be PCB fluid? If so, how to > safely drain, dispose and clean up the dripped fluid without wiping out much > of Western Europe (or at least myself). > > Bri > > Here are a couple of kitchen-level tests for PCB's: http://www.tredi.co.nz/html/html/identify.htm -- Get your free morse ringtone at http://www.planetofnoise.com Article: 100475 of rec.radio.amateur.boatanchors From: kludge@panix.com (Scott Dorsey) Subject: Re: AR88s and PCBs Date: 1 Nov 2005 13:24:52 -0500 Message-ID: References: <9KydnSgamOag5PreRVn-hQ@rcn.net> Bri wrote: > > However it still leaves the problem of potential PCB contamination: did >they, or did they not use PCB's? If it is just mineral oil then there is no >problem, I'll either refill, or more likely remove and replace with modern >capacitors inside the can. It's the potential for PCB poisoning that >concerns me most at the moment. If it says SAFETY or PYRANOL on it, it's got PCBs. When PCBs were popular, they were considered such a wonderful thing that manufacturers would brag about them on the case as using SAFETY OIL. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." Article: 100476 of rec.radio.amateur.boatanchors From: "Bri" Subject: Re: AR88s and PCBs Date: Tue, 1 Nov 2005 20:31:39 +0000 (UTC) Message-ID: References: Hi Phil. Thanks for that, you highlight my dilemma well. I don't think many people realise that PCB's have been around for as long as they have. I only became aware of the possibility when I came across a query by P Bertini. The simple tests suggested by AndyB above look promising in this regard. B "Phil Nelson" wrote in message news:da2dnRLvh4EMJPreRVn-sw@giganews.com... > PCBs are one of the most dangerous substances ever created. Oil-filled > capacitors containing PCB were made as early as the 1930s. The AR88 was a > wartime set, more likely than consumer radios to contain oil-filled > capacitors. > > There is no "safe level" of exposure to PCBs, and they do not break down > in the environment. I would not risk cleaning out the old cans and putting > new capacitors into them. Why not contact your local hazardous waste > agency and find out how you can safely (and legally) dispose of the > capacitors? > > This web article -- I'm sure you can find many others -- gives some > history about PCBs and their health effects. > > http://www.foxriverwatch.com/monsanto2a_pcb_pcbs.html > > Just my $0.02. > > Phil Nelson > > "Bri" wrote in message > news:dk5qim$6h8$1@nwrdmz02.dmz.ncs.ea.ibs-infra.bt.com... >>I noticed some concern as to the possibility (let's not put it any >>stronger than that) of PCB's (polychlorinated biphenyls) being used in the >>oil filled capacitors of RCA AR88's. I have 2 such sets, one of which is >>weeping like a baby. I intend to replace the old capacitors with modern >>equivalents inside the old cans. Is it really likely to be PCB fluid? If >>so, how to safely drain, dispose and clean up the dripped fluid without >>wiping out much of Western Europe (or at least myself). >> >> Bri >> > > Article: 100477 of rec.radio.amateur.boatanchors From: kludge@panix.com (Scott Dorsey) Subject: Re: AR88s and PCBs Date: 1 Nov 2005 17:04:56 -0500 Message-ID: References: Chuck Harris wrote: >It's a very interesting paper, it appears to have been written mostly >to scare, and to hopefully encourage one to become an environmental activist. > >However, every single point you mention above about the dangers is counter to >what is actually said in the article: it does biodegrade, it takes fairly >large exposure to cause chloroacne, or liver problems... > >Did you actually read the article? I am told that the real problem with PCBs is that they degrade into some very hazardous things when burned. Although, of course, they don't burn easily, which was the whole point of using them. I used to wade knee-deep into tanks of the stuff, and slather it all over transformer windings with bare hands. It turns out this is probably a bad thing, but I haven't noticed any problems yet. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." Article: 100478 of rec.radio.amateur.boatanchors From: " Uncle Peter" References: Subject: Re: AR88s and PCBs Message-ID: Date: Tue, 1 Nov 2005 18:17:08 -0500 "Bri" wrote in message news:dk8jbb$cpt$1@nwrdmz02.dmz.ncs.ea.ibs-infra.bt.com... > Hi Phil. > > Thanks for that, you highlight my dilemma well. I don't think many people > realise that PCB's have been around for as long as they have. I only became > aware of the possibility when I came across a query by P Bertini. The > simple tests suggested by AndyB above look promising in this regard. > > B > Bri Check this website by EA5 amateur: http://www.jvgavila.com/ar88_2.htm He claimed the capacitors had PCB dielectric, something I've never been able to confirm. A few other restorers have claimed that the original metal capacitors were leaky enough to cause AGC and other sensitivity problems on their AR-88x receivers. I haven't worked on or restored mine as of yet, so I am neutral on the whole issue. Pete Article: 100479 of rec.radio.amateur.boatanchors From: "Charlie Hugg" Subject: Wanted FT-102 Accessories Message-ID: Date: Tue, 1 Nov 2005 17:23:42 -0600 WTB accessories for the Yaesu FT-102. Looking for the SP-102 speaker and the FV-102DM ext VFO. Also a desk mic for the 102. Thanks, Charlie Hugg, K5MBX -- ________________________________ See my Signal/One, Collins & Drake Photo Galleries and my Hallicrafters Virtual Museum at http://hug-a-bug.com Article: 100480 of rec.radio.amateur.boatanchors From: "CSFD" Subject: FA on E-Bay Diamond Golden Eagle D-104 Message-ID: Date: Wed, 02 Nov 2005 03:35:58 GMT Own a rare Diamond Golden Eagle D-104 Item # 5824966027 Auction ends this coming Sunday afternoon. Article: 100481 of rec.radio.amateur.boatanchors From: Lawrence Statton N1GAK/XE2 Subject: Re: AR88s and PCBs Date: 01 Nov 2005 19:48:52 -0800 Message-ID: References: kludge@panix.com (Scott Dorsey) writes: > I used to wade knee-deep into tanks of the stuff, and slather it all over > transformer windings with bare hands. It turns out this is probably a bad > thing, but I haven't noticed any problems yet. > --scott That's okay, Scott -- We have ;) 73s -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Lawrence Statton - lawrenabae@abaluon.abaom s/aba/c/g Computer software consists of only two components: ones and zeros, in roughly equal proportions. All that is required is to sort them into the correct order. Article: 100482 of rec.radio.amateur.boatanchors Subject: Re: FA on E-Bay Diamond Golden Eagle D-104 From: Steveo Date: 02 Nov 2005 05:09:33 GMT Message-ID: <20051102000933.834$6L@newsreader.com> References: <6YidndFRPaSk3fXeRVn-jg@comcast.com> "TNT" wrote: > D 104s suck , sounds like talking through a tin can. > With good string? Article: 100483 of rec.radio.amateur.boatanchors From: "Caveat Lector" References: <6YidndFRPaSk3fXeRVn-jg@comcast.com> Subject: Re: FA on E-Bay Diamond Golden Eagle D-104 Message-ID: <%SY9f.16027$i%.539@fed1read07> Date: Tue, 1 Nov 2005 22:18:58 -0800 "TNT" wrote in message news:6YidndFRPaSk3fXeRVn-jg@comcast.com... >D 104s suck , sounds like talking through a tin can. Perhaps but have broken many a pileup with the rising frequency characteristic. Hmm some late model "Dream Machines" do the same thing -- CL -- I doubt, therefore I might be ! > > > "CSFD" wrote in message > news:yuW9f.12599$Zv5.119@newssvr25.news.prodigy.net... >> Own a rare Diamond Golden Eagle D-104 >> Item # 5824966027 >> Auction ends this coming Sunday afternoon. >> >> > > Article: 100485 of rec.radio.amateur.boatanchors From: Lazy Senior Subject: Re: FA on E-Bay Diamond Golden Eagle D-104 References: <6YidndFRPaSk3fXeRVn-jg@comcast.com> Message-ID: Date: Wed, 02 Nov 2005 13:08:05 GMT TNT wrote: > D 104s suck , sounds like talking through a tin can. > > > There is a good reason D 104's were and still are so popular. Microphones are like husbands and wives- they have to be compatitble. On the right radios (with high impedance mic inputs) they sound terrific. I have tried many different mikes on my old AM transmitter and always come back to the D-104, with the Shure 444 a close second. Lazy Senior Article: 100486 of rec.radio.amateur.boatanchors From: "Bri" Subject: Re: AR88s and PCBs Date: Wed, 2 Nov 2005 13:08:59 +0000 (UTC) Message-ID: References: Well, something of a hornets' nest here - pleased you are all enjoying the debate. My 'conclusion' thus far: 1) No one actually knows if the capacitors in question contain PCB's 2) If they do, they may or may not be hazardous even in small amounts 3) Therefore: i) I will test the fluid as described in posts ii) I will treat them as hazardous material in the meantime Now where did I put my rubber suit? Bri Article: 100487 of rec.radio.amateur.boatanchors From: "John N9JG" Subject: Re: BC-221 as VFO ?? Date: Wed, 2 Nov 2005 08:18:42 -0500 Message-ID: References: Your mention of the Central Electronics 20A brings back fond memories of my shack shortly after graduation from HS. I bought a brand new 20A from a store in Philadelphia's electronics row. I used a conversion kit sold by CE to create a VFO from a war surplus "command set". In addition to the 20A, I also bought a "signal slicer" kit from CE and used it with my Hammarlund HQ140X. Finally, my final was a pair of 100TH triodes http://www.uli.de/tubes/100th.htm running in grounded cathode mode. The final used a B&W plug-in link coupled tank coil. Yes, those were the good old days. I had as much fun with that equipment then, as I do now with my Ten-Tec Orion driving a Drake L-4B. John, N9JG "COLIN LAMB" wrote in message news:FsV9f.359$uD5.91@newsread3.news.pas.earthlink.net... [stuff] > I have used a number of BC-221/LM frequency meters into vfos, turned one > into a regen receiver and presently have a solid state LM meter as a vfo > in my Central Electronics 20A. It has a crystal controlled mixer for > output on the different bands. [stuff] Article: 100488 of rec.radio.amateur.boatanchors From: kludge@panix.com (Scott Dorsey) Subject: Re: AR88s and PCBs Date: 2 Nov 2005 08:40:02 -0500 Message-ID: References: Phil Nelson wrote: >> I used to wade knee-deep into tanks of the stuff, and slather it all over >> transformer windings with bare hands. It turns out this is probably a bad >> thing, but I haven't noticed any problems yet. > >I smoked cigarettes for over 20 years, then quit. It turns out this is >probably a bad thing, but I haven't noticed any problems yet . . . . Yes, probably a good comparison, I think. And I remember Lucky Strikes as being advertised as a health product, too, just as PCB oil was advertised as a safety product. "Reach for a Lucky instead of dessert" or something like that. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." Article: 100489 of rec.radio.amateur.boatanchors From: msix@nmia.com Subject: FS: HB cabinets de W7ZFB Message-ID: Date: Wed, 02 Nov 2005 15:30:19 +0000 NIB Bud SB-2143 steel shadow cabinet, panel recessed 1 inch, 15.5Wx9Dx6H, medium blue/gray hammertone, back and bottom removeable, alum front panel primed gray for painting a contrasting color. Takes Bud AC-409 13x7x2 chassis. $20 Modern stylish top of the line LMB enclosures... See info and drawings of the LMB line at www.lmbheeger.com New unused alum LMB CO-1 cabinet with matching LMB chassis. Contoured perforated case, recessed front panel, hinged top. Gray with ivory trim, dark gray front panel. CO-1 14.5Wx13Dx6.5H, CO-1-1 chassis 13x11x2. $70 New unused alum LMB CO-2. Style as above, 12Wx10Dx6.5H. Takes LMB CO-2-1 11x8x2 chassis. $45 New unused alum LMB CO-3. Style as above, no hinged top. 5.5Wx7Dx3H. $10 Nice used alum LMB CO-3. Style as above, no hinged top. Front has pot, switch and pilot light mounted. Rear has 3 BNC jacks and fuse mounted. $8 Plus postage 73 John W7ZFB - Always good in QRZ n Article: 100490 of rec.radio.amateur.boatanchors From: AndyB Subject: Re: AR88s and PCBs References: Message-ID: Date: Wed, 02 Nov 2005 16:14:40 GMT Chuck Harris wrote: > > The one part of the discussion that you should note, is that in industry, > folks were literally bathing in the stuff, (occasionally) with no problem. > We have several of those folks here on the group, and they have related > their > personal experience. > Thats a bit like the "My grandad smoked 80 a day all his life and lived to a 101" chestnut. Is this proof that smoking doesn't give you cancer or that the cancer statistics are wrong? Personal experience or anecdotal evidence means very little when dealing with long term toxicity (unless the illness is specifically associated with a given exposure, like asbestos and mesothilioma). It is medical statistics of a large, controled group that shed any truth to a matter such as this. Unfortunately, these are hard to come by because of the long term nature of PCB toxicity in a society literally bathed in chemical contaminants and highly mobile. Even closely monitored exposures, like the Seveso incident in Italy are inconclusive (I once spoke to the head of toxicology for the UKs Chemical Response Unit who reckoned that no-one found any ill effect >from that incident, but she was defending a hazardous waste site at the time.) > > If you take reasonable precautions to keep the stuff off of your skin, and > out of your mouth, you will not be harmed. Even if you don't, at those > small > amounts, it is very doubtful that you will ever show any symptoms. > 'Symptoms' are a sign of acute poisoning, obviously to be avoided, but the health authorities of EVERY developed country would consider someone with levels of PCBs in thier bodies millions of times less than that needed to cause 'symptoms' as being over the limit of reccomended exposure and at possible risk. Having been exposed to whopping doses doesn't mean you will be comparitively more ill than someone with a lot less inside them in the long term - the mechanisims of toxicity of PCBs are not the same as mercury or arsenic, where the more you have, the sicker you are. The endocrine system of the body works with tiny amounts of hormones and messenger chemicals, and its having these messed with that is the real worry (especially in developing children), and we DO know that PCB's and the like do just this. For instance, there is a disorder of the womb that is rampant today (can't remember the name right now) that was extremely rare before the invention of PCB's. There can never be a 'smoking gun' leading to the prescence of all pervasive PCB's in the environment as being the cause of this (for a number of reasons), but it is EXACTLY the type of illness predicted to be caused by long term PCB body burden and endocrine disruption. The World Health Organisation place a TDI of 1-4 picograms (a picogram being a *trillionth* of a gram) on Dioxin-like PCB's. That is an incredibly small amount Chuck, and when dealing with large amounts of this stuff (meaning any visible amount) you could easily get comparitively huge doses inside you without noticing, and you can't in all honesty state with confidence that 'you will not be harmed' by these amounts. Nobody knows for sure, but there is certainly enough evidence and (non-hysterical) concern around to be more than cautious. Andy Get your free morse ringtone at http://www.planetofnoise.com Article: 100491 of rec.radio.amateur.boatanchors From: "K7JEB" References: <_xs9f.500$0d.147@trnddc08> Subject: Re: Old Xmtrs, "Ancient Modulation" and Modern Amps Message-ID: <137af.16068$i%.12285@fed1read07> Date: Wed, 2 Nov 2005 17:54:21 -0000 >> The modern amp covers 160, though, along with the other bands, so of one is >> lazy (hence his name), the linear is a reasonable approach. >> Colin K7FM > This is what I suspected when I first asked my question, but many > posters here inferred it was not a reasonable approach. > Lazy Senior I use low-level modulation and a linear amplifier to work AM. My advice in selecting a linear amplifier for that mode is to focus on the heat dissipation capability of the final devices, be they tubes or transistors. Although the theoretical efficiency of a class-B amplifier is something like 67%, that applies to a signal swinging the amplifier between cutoff and saturation. For the carrier-wave level, which will be 1/4 the peak output power, the operating point will be in the regions of the characteristic curves that are much less efficient. I typically get 25-30% from my SB-220 with a 250-watt carrier output power. Worst-casing a desired 375-watt carrier level with 25% efficiency gives a final-power-dissipation requirement of 1125 watts - a stretch for a pair of 3-500's, somewhat easier with a 3CX1200 and easier still with an 8877/3CX1500. The steady-state power-supply requirements are also pretty strenuous - 1500 watts - although most recent designs (Ameritron AL-1500) are capable of this. The efficiency argument against using a linear and in favor of high-level modulation is seen to be fairly strong. However there are a few additional factors to consider: As noted by another poster, the modulator has to be powered up and has its own efficiency issues. Also, using a linear amplifier rather than a Class-C final reduces the harmonic-attenuation problem considerably (as well as neighborhood TVI complaints). Modulation done at low levels is more "controllable" with modestly sized components for splatter filters, negative-peak loading/clipping and negative feedback. I use an SSB transceiver (a Kenwood TS-850) for the extreme form of this "modulation control", since my transmit signal is passed through the same 6 kHz IF filter used for reception - effectively filtering out splatter and out-of-channel IMD. The last advantage of linear amplifier use, stated in the beginning of this thread, is, of course, the ready availability of commercial units, both new and used. For a dual-mode station (AM and SSB), the investment in the amplifier pays a double dividend while, at the same time, breathing new life into (and a whopping signal out of) many cherished vintage low-power AM transmitters. Jim, K7JEB Article: 100492 of rec.radio.amateur.boatanchors From: Lazy Senior Subject: Re: WTB D-104 or Shure 444 References: <1129800398.142753.88600@g43g2000cwa.googlegroups.com> <7O2dnT6F5-1sasXeRVn-jg@comcast.com> Message-ID: Date: Wed, 02 Nov 2005 18:11:59 GMT gb wrote: > > > Apples and Oranges. > The Astatic D104 uses a crystal element (Hi-Z), while the Shure 44 uses a > dynamic element (Lo-Z). The response curve (sensitivity to specific audio > frequencies from 100 Hz to over 7,000 Hz) of a specific microphone element > makes a BIG difference in reproduction of the human voice. > > g. beat > > The Shure 444 has a controlled magnetic element.My manual says it is high impedance for high mic inputs. The 444D had an impedance switch on the bottom for high or low the 444 does not. I have both D-104 and Shure 444 and have tested them a lot on a Valiant which has the audio mods. Most people prefer the sound of the D-104, but the Shure is a close second. Lazy Senior Article: 100493 of rec.radio.amateur.boatanchors From: " Uncle Peter" References: <1130899361.468758.34770@z14g2000cwz.googlegroups.com> Subject: Re: cer73c cer70a diodes in a HX50 transmitter Message-ID: Date: Wed, 2 Nov 2005 18:15:00 -0500 wrote in message news:1130899361.468758.34770@z14g2000cwz.googlegroups.com... > I am rebuilding a Hammarlund HX-50 transmitter and need to replace some > diodes. CER73C & CER70A are the part numbers on the schematic. I can > probably pick parts that would work, but I would like to know if these > numbers are industry standard numbers and if data sheets exist. > > 73 > Bob > N9NEO > Bob I know they are industry standard numbers, and I have drawers full of them in the cellar someplace. If you do a Google search you can probably find the original specs. NTE crosses the CER73 to a 1000 volt 1-amp diode, and the CER70 to a 600 volt 1 amp diode. (NTE 125 and NTE 116 respectively.) If it were my TX, I'd go with 1N4007 diodes, or even something with a bit more current rating. If you want originals, I could dig in my parts bins, but that might take a while :) Pete Article: 100494 of rec.radio.amateur.boatanchors From: Lazy Senior Subject: Re: Old Xmtrs, "Ancient Modulation" and Modern Amps (Only in America) References: <_xs9f.500$0d.147@trnddc08> Message-ID: Date: Thu, 03 Nov 2005 00:33:18 GMT William Warren wrote: > > My attitude is "If it isn't fun, stop doing it" - this is a _hobby_, but > somehow a few hams never get the word. > > FWIW. > > William > William We think alike. Too many hams take hamradio way too seriously. Its not a way of life, its just a small part of my life. I am a long time ham -45 yrs-. After posting here for the first time I was called a troll simply because I asked a stupid question which I didnt know the answer to. Altho having been a ham for so long, I am not particularly tech inclined.In other words my life doesnt revolve around electronics and theory.I know fom experience many hams look down on those who are only Tech lites or Generals. It is no surprise young people dont want to join our ranks. You were one of many who gave me a very informative answer in language I could understand. I only wish more had your attitude. Thanx and hope to CU on AM Lazy Senior Article: 100495 of rec.radio.amateur.boatanchors From: Lazy Senior Subject: Re: Old Xmtrs, "Ancient Modulation" and Modern Amps References: <_xs9f.500$0d.147@trnddc08> <137af.16068$i%.12285@fed1read07> Message-ID: Date: Thu, 03 Nov 2005 00:35:21 GMT K7JEB wrote: > I use low-level modulation and a linear amplifier to work AM. Jim What linear amp do you use? Lazy Senior Article: 100496 of rec.radio.amateur.boatanchors Date: Thu, 03 Nov 2005 02:40:59 -0400 From: Bill Subject: Re: AR88s and PCBs References: <1130965340.632265.178030@f14g2000cwb.googlegroups.com> <1130988678.234375.12600@g44g2000cwa.googlegroups.com> Message-ID: Chuck Harris wrote: > I am very fond of the environment. Probably much more so than you. I long > ago put my money where my mouth is. I am not at all fond of those that > call > themselves environmentalists. > > My contribution to this thread has long since past the point of being a > reasonable side tracking. This is my last posting on this subject... > for now. > > -Chuck > Well since you're bailing I feel safe in agreeing with you because I neither want to belabour an argument in whats good can be bad or vice versa. But... I worked a while in NE Oklahoma. Asbestos mines, lead mines. Pretty much under the radar of the environmentalists who seem to need someplace snazzier than Picher, Oklahoma to drive home their point. I found the local conditions appalling. Maybe because I was constantly reminded about don't drink the water...or inferences that "hell, thats the way those crazy Okies are". I worked in direct contact with people and it seemed as though EVERYBODY had a mentally defective family member hidden away in a back room and there was certainly no shortage of borderline cases outside and on the street. Anybody from outside would notice it. I'm 100% against the Kerry-camp type of "sky is falling" kneejerk reaction to anything that isn't mountain spring water (imported from France) so I'm not speaking from that context. It would seem to me, an eternal Devil's Advocate, that there are indeed issues with 'public level toxicity' that get totally overshadowed by both extreme camps. The guy that puts on a hazmat suit to work on his boatanchor or the politician that claims that they are producing honey if the industry benefits his district. Both come off as fanatics deflecting concern from the real world aspects. So yeah, these scenarios really do exist but not because an old radio is leaking fluids. If you want to save the earth you can start by saving Picher, Oklahoma and forget about the miniscule implications of your weenie little capacitors. -Bill Article: 100497 of rec.radio.amateur.boatanchors From: AndyB Subject: Re: AR88s and PCBs References: <1130965340.632265.178030@f14g2000cwb.googlegroups.com> <1130988678.234375.12600@g44g2000cwa.googlegroups.com> Message-ID: <7pkaf.53167$m%6.43821@fe3.news.blueyonder.co.uk> Date: Thu, 03 Nov 2005 09:05:07 GMT Really interesting to hear your views on all this and thanks for taking the time to express them (I don't think you're an environmental devil at all by the way). Your trees sound lovely, truly jealous. Spent a while in British Columbia not long back, everything seemed comparitively dead when I left there....but this is all way OT now, so thanks again. Andy Bill wrote: > Chuck Harris wrote: > > >> I am very fond of the environment. Probably much more so than you. I >> long >> ago put my money where my mouth is. I am not at all fond of those >> that call >> themselves environmentalists. >> >> My contribution to this thread has long since past the point of being a >> reasonable side tracking. This is my last posting on this subject... >> for now. >> >> -Chuck >> > Well since you're bailing I feel safe in agreeing with you because I > neither want to belabour an argument in whats good can be bad or vice > versa. > > But... > > I worked a while in NE Oklahoma. Asbestos mines, lead mines. Pretty > much under the radar of the environmentalists who seem to need someplace > snazzier than Picher, Oklahoma to drive home their point. > > I found the local conditions appalling. Maybe because I was constantly > reminded about don't drink the water...or inferences that "hell, thats > the way those crazy Okies are". I worked in direct contact with people > and it seemed as though EVERYBODY had a mentally defective family member > hidden away in a back room and there was certainly no shortage of > borderline cases outside and on the street. Anybody from outside would > notice it. > > I'm 100% against the Kerry-camp type of "sky is falling" kneejerk > reaction to anything that isn't mountain spring water (imported from > France) so I'm not speaking from that context. > > It would seem to me, an eternal Devil's Advocate, that there are indeed > issues with 'public level toxicity' that get totally overshadowed by > both extreme camps. The guy that puts on a hazmat suit to work on his > boatanchor or the politician that claims that they are producing honey > if the industry benefits his district. Both come off as fanatics > deflecting concern from the real world aspects. > > So yeah, these scenarios really do exist but not because an old radio is > leaking fluids. If you want to save the earth you can start by saving > Picher, Oklahoma and forget about the miniscule implications of your > weenie little capacitors. > > -Bill -- Get your free morse ringtone at http://www.planetofnoise.com Article: 100498 of rec.radio.amateur.boatanchors From: "Jim, KK1W" Subject: HCRA Auction - Feeding Hills, MA, November 4th Message-ID: Date: Thu, 3 Nov 2005 08:12:46 -0500 Just one day until the auction. We have just received the following donation for sale tomorrow evening: Through the generosity of Dan Beaudry HCRA has obtained his dad's HF/VHF equipment as a donation for sale at tomorrow night's auction. Jim Beaudry, K1GIU, joined the ranks of the 'silent keys' in 1999. The electrons in his equipment have been waiting since then to be set free! I will do a quick check on the equipment before bringing it to the auction. Check out the list below, it represents a great opportunity to get on the air at bargain basement prices. All proceeds benefit your club so don't be shy with your bidding. DONATION FROM K1GIU Icom IC-706 - Mobile HF/VHF/UHF 100W Transceiver w/mic Icom IC-3200 - Mobile VHF/UHF Dual band transceiver w/mic Icom IC-751A - Base HF transceiver Dentron GLA-1000 HF Amplifier - missing fan and tubes MFJ Versatuner V - 3KW HF roller inductor tuner VoComm power amplifier TOY DRIVE! HCRA is asking all auction attendees to help the ARRL and the Salvation Army with their Toy Drive for 2005. If you're able, please bring an unwrapped toy with you to the auction. We will gather them together and bring them to the ARRL for distribution to displaced children from the Gulf hurricanes. Thanks in advance and don't forget to attach your QSL card to your donation. Now on to the auction... The annual HCRA auction returns again with our usual fun and bargain extravganza! Come to Feeding Hills, MA on Friday, November 4th and enjoy a great amateur radio auction. This yearly event draws over 100 people from at least three states. It's a great place to sell your old stuff or go home with a bargain. Win a Yaesu VX-7R in the raffle too! Only a week away - have you got your stuff ready?? The particulars: Date: November 4th, 2005 Time: Set-up at 6:30 PM, auction starts at 7:00 PM Place: Feeding Hills Congregational Church 23 North Westfield Street Feeding Hills, MA 01030 Admission: Free!!!! Here's a link to a Google interactive map: http://maps.google.com/maps?q=21+North+Westfield+Street,+Feeding+Hills,+MA&spn=0.043945,0.079338&hl=en The simple rules: Sellers: Mark your item with your name, call (if you have one) and a minimum selling price (if you so desire). 10% of the sale goes to HCRA (maximum is $10). Amateur radio or computer items only. Please box small items into lots for quick auctioning. If it doesn't sell you bring it home. Buyers: Bid, buy and go home with a bargain! The tradition of a great raffle prize continues. Purchase a raffle ticket to win a Yaesu VX-7R Handy Talkie. Also second and third prizes of an ARRL Antenna Book and a 25A power supply. Coffee, donuts and softdrinks will be available. Everyone is welcome, bring a friend or two along for the fun. For further information please drop me an email or call. All contact details are on our web site at: http://www.hcra.org. '73... Jim, KK1W Article: 100499 of rec.radio.amateur.boatanchors From: "Jim McShane" Subject: FS: Transmitting Type Tubes Message-ID: Date: Thu, 03 Nov 2005 15:16:34 GMT I have accumulated a few transmitting types that are really unfamiliar to me, as I specialize in audio and guitar tubes. Rather than just let them sit, I'd like to find them a good home. Most are JAN or FAA designated, all are USA made. I've priced them at about 1/2 of what the typical price was that I could find on the web. I can't test most of them, but all are guaranteed not to be D.O.A., or I'll refund the price. Here's the list - it's the quantity, then the tube number, followed by the "web" price (mostly from RES or RF Parts), then the selling price: Qty. Type Web Price My Price ea. 1 2K25 $25.00 $13.00 1 3E29 (829A) $14.00 $7.00 2 3B25 (new) $20.00 $10.00 2 3B25 (used?) $20.00 $6.00 3 4D21/4-125A $95.00 $50.00 1 5D21 $42.00 $21.00 1 705A $10.00 $5.00 3 815 $15.00 $8.00 1 826 $35.00 $18.00 2 829B $14.00 $7.00 2 832A $7.00 $4.00 1 8122 (used?) $225.00 $75.00 Drop me a note if you can use any of these tubes. Thanks so much! Jim McShane Need Tubes? Got a H-K Citation (Pre) Amp? Check http://pages.prodigy.net/jimmcshane Repro knobs for Citation gear in stock! Article: 100500 of rec.radio.amateur.boatanchors From: "Jim McShane" References: <1vKdnZaczu-sq_feRVn-qw@adelphia.com> Subject: Re: 813's Message-ID: <6%qaf.3561$Lv.1937@newssvr23.news.prodigy.net> Date: Thu, 03 Nov 2005 16:35:14 GMT Hello! I'm interested in the new unused 813s. How many do you have on hand? Let me know if you would. Many thanks, Jim McShane "K3HVG" wrote in message news:1vKdnZaczu-sq_feRVn-qw@adelphia.com... > I find that I have about 40 type 813 tubes "in stock". All these tubes > are either removed from unused equipment or from used surplus gear. The > only rig I have that uses them is my ART-13A transmitter and I'll never > use these extras in my lifetime plus 100 years! Each and every tube has > been tested in my ART-13 transmitter and compared with a new tube at the > 120 watt output level. Each tube was at least as good as the NIB JAN > tube. I'm asking $10 (which is exactly what I paid) a piece and actual > cost for postage. I also have a plethora of 1625's for $8 each. > Tnx de K3HVG > Article: 100501 of rec.radio.amateur.boatanchors From: WD=?ISO-8859-1?B?2A==?=HCO Subject: Re: Attention please Heathkit HW-16 owners Date: Thu, 03 Nov 2005 11:03:06 -0600 Message-ID: References: Hello Again Thermo-man and everyone else. Well your on the right track. > There is a slight voltage variation of about 1/2 volt on the screen of V3 that can be detected when a strong signal is present, and a change of a couple hundredths of a volt on the cathode. There should be no voltage changes. Oscillators are very fragile things - doesn't take much to get an amp to oscillate but keeping it on an exact freq is an art. Most military receivers have buffer amps after various oscillators to keep things steady. This is why they have so many tubes ! Any little change will affect frequency. SOMETHING is causing this voltage change. What could it be ?? > I tried other values for C56 and find that the shift is less with less C and larger with more C. Big clue! What your doing is adjusting the amount of coupling from the VFO RF into the cathode circuit of V3A mixer tube. Well DUH! But what most folks forget is that a cap is a two way RF door. Part of the Main sig is coming back to the VFO the other way... It travels down to the Colpitts circuit of C59 and C61 (both 1000 puff). The idea is to attenuate the main sig to ground (C61) while coupling the VFO RF to C56. If C59 or C61 values have changed then the main sig will couple into the VFO tube Cathode circuit (V3B) and cause all sorts of problems. It could also couple into the control grid -and- VFO LC circuit if C58 has changed value (100 puff). You can also check resistors R34 and R32 but I really don't think that's the problem. >I think next I will remove C56 entirely and see if the VFO is still shifting. This will prove that it's not a power supply problem. Your not coupled to anything so the VFO should not shift frequency. NOW FOR SOME FUN... You can couple the VFO to other parts of the Mixer tube. Heath has it coupled to the Cathode of V3A but you don't have to have it that way.... What happens if you run a wire from C56 and plug it into the Plate ? Well since an equal number of electrons are emitted from the Cathode as they are arriving at the Plate - I would expect no change in VFO performance/problem. What happens if you run a wire from C56 and plug it into the Grid Leak circuit (Pin 3 6EA8 V3A)? Now your more isolated from the main sig but your VFO drive level is too high! You can compensate by using less cap in C56. What happens if you run a wire from C56 and plug it into the Control Grid circuit (Pin 2 6EA8 V3A)? Now your VFO is mixed with the main sig but at a much lower level. Again, your VFO drive level is too high! You can compensate by using less cap in C56. T2 bandpass limits the amount of VFO passing back up to the V2A Het Mixer. The main sig level is too low to bother the VFO unlike the Cathode injection point. This might be a good alternative solution to your VFO problem. So now your can change the VFO mixer level. What if you could adjust the BFO and 1st HET oscillator levels too ? Well you would have one heck of a receiver customized for present band conditions, DX or local QSO's and even individual tubes! Lets face it - all factory circuits are a compromise of performance, tube values and conditions and operator likes and dislikes. Actually this is a pretty good idea for a project if you don't mind butching up a set. And since you can find 16's for $25 to $50 bucks you wouldn't be out by much if you blew it up.... hmmm when's the next hamfest??? -B Article: 100502 of rec.radio.amateur.boatanchors From: bonomi@host122.r-bonomi.com (Robert Bonomi) Subject: Re: Shipping: UPS Ground vs. FedEx Ground EEOO other weasel words Date: Thu, 03 Nov 2005 17:52:19 -0000 Message-ID: <11mkjijh2hvkf04@corp.supernews.com> References: In article , Bill wrote: >Mr Fed UP wrote: >> Other weasel words I have seen on many company names these days. >> Are LLC instead of INC or CO .... I found it to be the acronym for >> Limited Liability Company. Anyone know what this means for them >> to weasel out of being liable? Seems like most companies are going >> to similar labels. I don't want to be liable for nothing either, but >> Sheezzzz!!! Do we all expect to get shafted from every place we >> do business now? Any enlightenment appreciated. >> Any lawyers out there? Can they really do business and not be >> responsible for the services and products they sell? > >You're confusing liability for damages with liability between partners >of a corporation. Same word, different context. > >Here's a brief explanation taken from the web. > > >Liability Issues of a Limited Liability Company > >In a limited liability company, a member's legal liability is limited to >his or her investment in the business. Generally, a member's personal >assets are not at risk, but a member's personal assets may be at risk if >any of the following occurs: > > * > A member personally guarantees a business debt. > * > The form of business is found to be a sham (not properly formed >or maintained). > * > A member becomes personally liable as a result of his or her own >acts or conduct. > Technically, an "LLC" is a modified form of a partnership. In a traditional partnership, *each* owner is responsible for _all_ the liabilities of the business. In an LLC, 'n-1' (at *most*) of the partners are 'limited liability' partners -- they have liability exposure only up to the assets they have invested in the company (subject to 'special case' situations like those mentioned above, whereby they may incur additional liabilities). The remaining partner (or partners) is a "general partner", and is personally liable for any/all things above and beyond the assets provided by the "limited" partners. A full fledged "Corporation" is a 'legal person' in and of itself. Assets of the shareholders (the owners of the corporation) are immune from claims against the corporation. Officers and directors of the corporation may have personal liability to the shareholders for acts as a corporation official. Persons acting "on behalf of" the corporation may end up with personal liability for their own actions or conduct, IN ADDITION TO the corporation's liabilities for those actions/conduct. An LLC is much simpler -- in terms of organizational structure -- than a full- fledged corporation, But it gives the 'limited' members "almost all" of the protections of a passive stockholder in a corporation. Basically, it is an attempt to give the 'small guy' most of the benefits of the real corporation, without burdening him with all the overhead that is necessary for a large business entity -- WHILE, at the same time, ensuring that there _is_ a "responsible party" to fall back on, in the event of claims against the business. >From a customer standpoint, there is essentially "no difference" between dealing with an LLC, and dealing with a full-blown corporation. Article: 100503 of rec.radio.amateur.boatanchors From: "Apostolos Bourousis" Subject: FA: Collins r-388 & r-390a & 51J4 super auction for parts Date: Thu, 3 Nov 2005 23:15:38 +0200 Message-ID: Collins parts mega auction Please see ALSO !!! my other auctions for rare collins parts http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ssPageName=ADME:L:LCA:US:31&item=5826040802 Article: 100504 of rec.radio.amateur.boatanchors From: William Mutch Subject: Re: BC-221 as VFO ?? Date: Thu, 3 Nov 2005 16:33:28 -0500 Message-ID: References: In article , wcm1 @NOSPAM.cornell.edu says... Thanks guys. I've made up a cable with a tuned circuit in the line to reduce undesired harmonics and will try it out...maybe this weekend. as... de KC2LVQ > At last spring AWA meet I picked up a homebrew novice transmitter > of unknown provanence. It has a close resembleance to the one in the > 1976 Handbook (except that it uses an electron coupled 12BY7 instead of > a 6DK7) and was built by a fine craftsman who did a first rate job on > it. The previous owner got it at an estate sale and didn't know who > built it. > > Last weekend I got around to bringing it slowly up to working > voltage on a variac and tuning it into a dummy load with a variety of > Xtals. The 6146B final will deliver between 40 and 60 watts to the load > on 80, 40 and 20, but I had to stop testing before I got up to 15 meters > as my Tek 922 scope expired. > Since the rig will deliver power to both 40 and 20 I thought to > see if I can put it on 30 meters, but I haven't any Xtals which will > multiply into the band. I thought about using my BC-221 as a VFO. > > > Will the BC-221 provide enough volts out to stabilize the xtal > oscillator ?? > > What would be the best way to cable from the output of the BC-221 > (some previous owner added a pl-259) to the xtal socket of the rig ?? > It sees a 47K resistor to ground from the grid and is DC blocked by a > capacitor. > > I need to assure myself that the BC-221 will not be damaged. > > Has anyone ever done this ?? > Article: 100505 of rec.radio.amateur.boatanchors From: "k6zsr" Subject: FA:Vintage HALLICRAFTERS SPEAKER PM-23 NO RESERVE! Message-ID: Date: Thu, 3 Nov 2005 22:51:55 -0700 See it at : http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=5825020463 No Reserve Article: 100506 of rec.radio.amateur.boatanchors From: "GHB" Subject: ASTRON POWER SUPPLY PARTS Message-ID: Date: Fri, 04 Nov 2005 15:19:17 GMT Does anyone know where to get parts for an RM-60M Astron power supply? Astron corp may not want to help me. I may need a power transformer to to replace the old one. Thanks Article: 100507 of rec.radio.amateur.boatanchors From: Lazy Senior Subject: Re: ASTRON POWER SUPPLY PARTS References: Message-ID: Date: Fri, 04 Nov 2005 15:56:03 GMT GHB wrote: > Does anyone know where to get parts for an RM-60M Astron power supply? > Astron corp may not want to help me. I may need a power transformer to to > replace the old one. Thanks > > > > Give Astron a try. I needed a power switch for a old RS-50m and Astron sent it *free* along with a manual to me. Excellent people to deal with. Doubt you will get a transformer free but bet they sell you one reasonable. Lazxy Senior Article: 100508 of rec.radio.amateur.boatanchors From: "Art & Linda Hubert" Subject: Wanted QSL Collections & DX Bulletins Date: Fri, 4 Nov 2005 12:18:37 -0500 Message-ID: <436b97ee$1@news2.lightlink.com> Looking for QSL card collections from estates or you just want get rid of them. Also past issues of DX bulletins both Ham and SWL. Please email and we'll discuss terms, Thank You Article: 100509 of rec.radio.amateur.boatanchors From: kludge@panix.com (Scott Dorsey) Subject: Re: Old Xmtrs, "Ancient Modulation" and Amps Date: 4 Nov 2005 12:53:12 -0500 Message-ID: References: <26D9f.23096$wG.19786@bignews4.bellsouth.net> <8sL9f.42077$Pp1.37056@bignews3.bellsouth.net> Randy or Sherry Guttery wrote: >Chuck Harris wrote: > >> If you are going to couch the question that way, the answer is >> none. > >This was in response to the previous discussion of the fact there is no >standards for S unit meters (i.e. there are reports of S Units being >anywhere from 1-6db/S unit - with 6db having been a proposed (but >failed) standard - and 5db/S unit seeming to be common in modern (SSB) >rigs. This is bad, but I agree. >Someone mentioned that military gear using "S meters" were calibrated to >6dB/S unit. I'm not familiar (in spite of being married to a boatanchor >collector with a fair number of pieces of gear) with any "native" mil >gear with S meters - which you pretty much confirm above. That was me. >Since that individual noted mil gear with calibrated S meters - I was >exploring that question. As I noted - it wouldn't surprise me to learn >that some modern (post 1980) mil gear has S meters... For a while (post 1980) they appeared on some of the gear that was intended for use by relatively untrained operators, but for the most part it wasn't widespread. Mostly because gear that was intended for skilled users (and I put the R-390 in that category) may as well use the more accurate dB metering, and gear that was intended for unskilled users pretty much didn't have metering at all (like most field radios). >Hence the "couched" question. There is a 6 dB mil standard for the things, and I'll dig it up because I have it somewhere in my office. The fact that it doesn't get used much if at all is quite true, though. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." Article: 100510 of rec.radio.amateur.boatanchors From: Lazy Senior Subject: Re: Wanted QSL Collections & DX Bulletins References: <436b97ee$1@news2.lightlink.com> Message-ID: Date: Fri, 04 Nov 2005 18:12:50 GMT Art & Linda Hubert wrote: > Looking for QSL card collections from estates or you just want get rid of > them. Also past issues of DX bulletins both Ham and SWL. Please email and > we'll discuss terms, > Thank You > > I was at a Antique Mall last week and found a dealer with a shoebox full of QSL's from the 40's and 50's. They wanted $75 for all. Do people really want other Ham's QSL's? Lazy Senior Article: 100511 of rec.radio.amateur.boatanchors From: Randy or Sherry Guttery Subject: Re: Old Xmtrs, "Ancient Modulation" and Amps References: <26D9f.23096$wG.19786@bignews4.bellsouth.net> <8sL9f.42077$Pp1.37056@bignews3.bellsouth.net> Message-ID: Date: Fri, 04 Nov 2005 13:17:59 -0600 Scott Dorsey wrote: > For a while (post 1980) they appeared on some of the gear that was intended > for use by relatively untrained operators, but for the most part it wasn't > widespread. Mostly because gear that was intended for skilled users (and > I put the R-390 in that category) may as well use the more accurate dB > metering, and gear that was intended for unskilled users pretty much didn't > have metering at all (like most field radios). I had a feeling there might be a few "latter day" examples of mil S-meters - but, yes I quite agree - the few BA receivers I'm familiar with that have meters (390 series, WWR-2, etc.) are dB while the vast majority of BA receivers don't have any signal strength meter at all (ARC 5, 348, 654, and so on). > There is a 6 dB mil standard for the things, and I'll dig it up because > I have it somewhere in my office. The fact that it doesn't get used much > if at all is quite true, though. That's what I'm interested in - I did a quick (very quick) scan through several of the manuals I have here (Navy Electronics Tech 3 & 2 parts 1 & 2; Basic Electronics; EIMB Reference Data, EIMB Communications (incomplete); EIMB TM&P)- and while just about every manner of dB is covered- I didn't spot a single mention of S-Units. I must note, however - they are from my time in the Navy - which was the 1970s- and that's why I have allowed that S-units may have come into common use in the military in sometime since 1980. best regards... -- randy guttery A Tender Tale - a page dedicated to those Ships and Crews so vital to the United States Silent Service: http://tendertale.com Article: 100512 of rec.radio.amateur.boatanchors From: "Clif Holland" References: Subject: Re: ASTRON POWER SUPPLY PARTS Message-ID: Date: Fri, 04 Nov 2005 19:52:19 GMT My money says the transformer is good. -- Clif Holland KA5IPF www.avvid.com "Lazy Senior" wrote in message news:nwLaf.2506$An6.2352@trnddc08... > GHB wrote: >> Does anyone know where to get parts for an RM-60M Astron power supply? >> Astron corp may not want to help me. I may need a power transformer to >> to >> replace the old one. Thanks >> >> >> >> > Give Astron a try. I needed a power switch for a old RS-50m and Astron > sent it *free* along with a manual to me. Excellent people to deal with. > Doubt you will get a transformer free but bet they sell you one > reasonable. > > Lazxy Senior Article: 100513 of rec.radio.amateur.boatanchors From: novatech@eskimo.com (Steven Swift) Subject: Thordarson TS-24R00 specs Date: 4 Nov 2005 20:35:21 GMT Message-ID: I downloaded the Thordarson catalog on BAMA, but it didn't have the TS-24R00 transformer. Any know the specs? I need the B+ current rating. TIA, Steve. -- Steven D. Swift, novatech@eskimo.com, http://www.novatech-instr.com NOVATECH INSTRUMENTS, INC. P.O. Box 55997 206.301.8986, fax 206.363.4367 Seattle, Washington 98155 USA Article: 100514 of rec.radio.amateur.boatanchors From: et472@FreeNet.Carleton.CA (Michael Black) Subject: Re: ASTRON POWER SUPPLY PARTS Date: 4 Nov 2005 21:22:31 GMT Message-ID: References: "Clif Holland" (clif@avvid.com) writes: > My money says the transformer is good. > And of course, the transformer is likely the most expensive item in the power supply. Either it is good, as you say, or one has to reconsider. Any of the other power supply parts will be cheap and likely easy to get, but a transformer is going to be costly. Michael VE2BVW Article: 100515 of rec.radio.amateur.boatanchors Subject: Why Is a Ship Called: "She"? :-) From: "Usenet Joe" Date: Fri, 4 Nov 2005 14:00:52 -0800 Message-ID: <436bda7a$1_5@alt.athenanews.com> I finally found the answer. :-) http://www.digitalfog.com/index.php/2005/11/why-is-a-ship-called-she/ Article: 100516 of rec.radio.amateur.boatanchors From: "Crazy George" References: Subject: Re: Thordarson TS-24R00 specs Date: Fri, 4 Nov 2005 18:30:19 -0600 Message-ID: <436c00a5_1@news1.prserv.net> 240 volts @ 40 ma. -- Crazy George W5VPQ My real address is my ham call ARRL.NET The ATTGlobal is a SPAM trap. "Steven Swift" wrote in message news:dkggm9$n0q$1@eskinews.eskimo.com... > I downloaded the Thordarson catalog on BAMA, but it didn't have the > TS-24R00 transformer. Any know the specs? I need the B+ current rating. > > TIA, > > Steve. > > -- > Steven D. Swift, novatech@eskimo.com, http://www.novatech-instr.com > NOVATECH INSTRUMENTS, INC. P.O. Box 55997 > 206.301.8986, fax 206.363.4367 Seattle, Washington 98155 USA Article: 100518 of rec.radio.amateur.boatanchors From: novatech@eskimo.com (Steven Swift) Subject: Re: Thordarson TS-24R00 specs Date: 5 Nov 2005 01:04:22 GMT Message-ID: References: <436c00a5_1@news1.prserv.net> Thanks, "Crazy" that's exactly what I needed. "Crazy George" writes: >240 volts @ 40 ma. >My real address is my ham call ARRL.NET The ATTGlobal is a SPAM trap. >"Steven Swift" wrote in message >news:dkggm9$n0q$1@eskinews.eskimo.com... >> I downloaded the Thordarson catalog on BAMA, but it didn't have the >> TS-24R00 transformer. Any know the specs? I need the B+ current rating. >> >> TIA, >> >> Steve. >> -- Steven D. Swift, novatech@eskimo.com, http://www.novatech-instr.com NOVATECH INSTRUMENTS, INC. P.O. Box 55997 206.301.8986, fax 206.363.4367 Seattle, Washington 98155 USA Article: 100519 of rec.radio.amateur.boatanchors From: "Ron H" References: Subject: Re: WAIT!! Old Xmtrs, "Ancient Modulation" and Amps Message-ID: Date: Fri, 4 Nov 2005 19:08:21 -0600 Now I don't want to get you guys too far off track...but.... wouldn't a guy better spend his time and money on the antenna??? All of the discussions on power out and S units etc assume that some reasonable portion of his output is actually being radiated......:>) Hey Lazy Senior... what is you antenna? K3PID Ron H. Article: 100520 of rec.radio.amateur.boatanchors From: Lazy Senior Subject: Re: WAIT!! Old Xmtrs, "Ancient Modulation" and Amps References: Message-ID: Date: Sat, 05 Nov 2005 13:36:29 GMT Ron H wrote: > > Hey Lazy Senior... what is you antenna? > > > K3PID > Ron H. > > > > Ron Aint nothing wrong with my antennas. I use a 75mtr loop at 60 ft for 75 and 40 mtrs. its fed with open feeders. A 160 mtr L with 24 radials, and a beam at 50 ft for 20-10 mtrs. I also live on a high hill...... I have a solidstate linear which I use with my modern equiptment. Aint nothing wrong with higher power. If 40 watts carrier is good, 375 watts is really good. :> Lazy Senior Article: 100521 of rec.radio.amateur.boatanchors From: Lazy Senior Subject: Viking Ranger and PTT Message-ID: Date: Sat, 05 Nov 2005 14:18:19 GMT I just recapped my newly purchased Viking Ranger. It now works great. It doesnt have the PTT mod. My manual has the instructions to do the mod but it requires a Potter Brumfield LM 11 10,000 ohm relay. This relay is no longer made and I havent been able to find a suitable replacement for it. My thought is to use a 12 volt relay with maybe a small 12v supply built-in to the Ranger or maybe a 12v wall wart. Has anyone done this PTT without using the LM11 relay? Maybe there is a better, easier way to add PTT. I dont want to re-invent the wheel. Thanx Lazy Senior Article: 100522 of rec.radio.amateur.boatanchors Subject: Re: Viking Ranger and PTT From: Darrell References: Message-ID: Date: Sat, 05 Nov 2005 15:19:45 GMT No problem. Just use a diode and filter capacitor and tie it to the filament line. I've done it. It will work fine. 73, Darrell, WA5VGO Article: 100523 of rec.radio.amateur.boatanchors From: "GHB" References: <4pidnQ58r9FapPHenZ2dnUVZ_s-dnZ2d@comcast.com> Subject: Re: ASTRON POWER SUPPLY PARTS Message-ID: Date: Sat, 05 Nov 2005 18:53:10 GMT I want to thank all of you for your outpouring of information on this subject and no I'm not sure if the transformer is really bad. "gb" wrote in message news:4pidnQ58r9FapPHenZ2dnUVZ_s-dnZ2d@comcast.com... > "GHB" wrote in message > news:VZKaf.4058$2y.205@newsread2.news.atl.earthlink.net... > > > > Does anyone know where to get parts for an RM-60M Astron power supply? > > Astron Corp may not want to help me. I may need a power transformer to to > > replace the old one. Thanks > > > VERY UNUSUAL for a transformer failure on an Astron supply. > How did you check this?? > > IF you are new at troubleshooting Astron supplies, look here for almost > everything you need to troubleshoot (KBT DC Supplies): > http://www.kbt-dc-supplies.com/index.php > > I use a standard Fluke DVM for all Astron repairs (check bridge rectifiers, > diodes, pass transistors, voltage / current measures. > > Standard components to fail on Astron: > > LM723 - no simple way to test (NEVER remove or install without draining the > large bean can electrolytic capacitor -- or you will destroy it internally) > > Bridge rectifier > MOV on across primary of transformer > NPN Pass Transistors (2N2055 or 2N3771) on heat sinks > Sometimes SCR (Crow Bar circuit) > > Broken Astrons are a "gold mine" since they are straight forward to repair!! > http://www.seits.org/features/pwrsup.htm > > Astron schematics > http://www.repeater-builder.com/astron/astron-index.html > > gb > > Article: 100524 of rec.radio.amateur.boatanchors From: novatech@eskimo.com (Steven Swift) Subject: Variable Regulated Tube Power Supplies. Date: 5 Nov 2005 19:02:04 GMT Message-ID: Over the past few weeks, I have seen postings requesting schematics for variable tube supplies. I finally took a few minutes to scan in a couple from the GE Essential Characteristics Book from 1969, and to convert a hand-drawn schematic to .pdf. I doubt that these schematics are definitive, but I built two of them and they work on my bench. The GE 1-compactron supply also exists as a totally solid-state version as a dedicated BC-312 supply (MosFet as pass element and a MPSA42 as the gain stage). I put the schematics, along with a brief explanation, up on: http://novatech-instr.com/Fun/ge_ps.pdf I am pretty sure the last schematic violates the specs for a 12GB3, but it seems to be working. Comments are welcomed. Steve. -- Steven D. Swift, novatech@eskimo.com, http://www.novatech-instr.com NOVATECH INSTRUMENTS, INC. P.O. Box 55997 206.301.8986, fax 206.363.4367 Seattle, Washington 98155 USA Article: 100525 of rec.radio.amateur.boatanchors From: "west" References: Subject: Re: Variable Regulated Tube Power Supplies. Message-ID: Date: Sat, 05 Nov 2005 21:38:35 GMT "Steven Swift" wrote in message news:dkivjc$83n$1@eskinews.eskimo.com... > Over the past few weeks, I have seen postings requesting schematics for > variable tube supplies. I finally took a few minutes to scan in a > couple from the GE Essential Characteristics Book from 1969, and > to convert a hand-drawn schematic to .pdf. > > I doubt that these schematics are definitive, but I built two of them > and they work on my bench. The GE 1-compactron supply also exists as a > totally solid-state version as a dedicated BC-312 supply (MosFet as > pass element and a MPSA42 as the gain stage). > > I put the schematics, along with a brief explanation, up on: > > http://novatech-instr.com/Fun/ge_ps.pdf > > I am pretty sure the last schematic violates the specs for a 12GB3, but > it seems to be working. > > Comments are welcomed. > > Steve. > > -- > Steven D. Swift, novatech@eskimo.com, http://www.novatech-instr.com > NOVATECH INSTRUMENTS, INC. P.O. Box 55997 > 206.301.8986, fax 206.363.4367 Seattle, Washington 98155 USA Hello Steve, Thanks for the interesting PS links. I'm not sure of their HT current capabilities. I've been wanting to make a good bench HT, Fil, & Bias supply, for a while now. I have a few ham radio PS that don't quite make it.. The major drawback is that the Xfrs are only capable of 100ma. At times I could use a little more that 400ma. Hopefully, someone reading this thread will come up with a viable suggestion. Cordially, west Article: 100526 of rec.radio.amateur.boatanchors From: Lazy Senior Subject: Re: Viking Ranger and PTT References: Message-ID: Date: Sat, 05 Nov 2005 22:02:01 GMT Darrell wrote: > No problem. Just use a diode and filter capacitor and tie it to the > filament line. I've done it. It will work fine. > > 73, > Darrell, WA5VGO This sounds interesting and maybe easier than the 10,000 ohm relay route. And drawbacks to using the filament power? Lazy Senior Article: 100527 of rec.radio.amateur.boatanchors From: "Antonio Vernucci" References: Subject: Re: drake CW TX sidebands? (newbie ?) Date: Sat, 5 Nov 2005 23:07:34 +0100 Message-ID: <436d2d27$0$22287$4fafbaef@reader1.news.tin.it> > In CW, the the Sideband switch must be on the "X" side to TX.... But = as=20 > I cycle thru the bands, some (80,15,10m)are on the wrong sideband (as=20 > shown by the indicator light). The sideband concept is only meaningful for SSB. Convention is to use = LSB on 80 and 40, and USB on 20, 15 and 10. On CW you transmit just a plain carrier that has no sidebands. Therefore = noone can determine which filter you use when transmitting CW. In = principle you could use either of the two filters without fear of = infringing any convention. But the TR-4 requires that, on CW, you always = use the same filter (that marked X). That filter, on SSB, is for the = upper sideband on certain bands or for lower sideband on other bands. = But this matters only when you work SSB. For CW you put the switch to X = and forget. =20 Tony I0JX Article: 100528 of rec.radio.amateur.boatanchors From: Edward Knobloch Subject: Re: drake CW TX sidebands? (newbie ?) References: Message-ID: <%iabf.288$Y97.136@trndny05> Date: Sat, 05 Nov 2005 22:24:59 GMT Hi re: Your question on the Drake TR-4 in c.w. mode, you should always keep the switch in the "x" sideband position for c.w. In the "x" position, during c.w. or a.m. transmit, the 9mc BFO crystal frequency will be shifted into the passband of the "x" SSB filter, to reduce carrier loss through the filter. On some bands, in c.w. mode, you will be listening on USB, and other bands you will be listening on LSB, as indicated by the red indicator lights. Thus, you talk about the "x" filter instead of USB or LSB filter, because the "x" filter will be for USB on some bands and LSB on other bands. The "upper" or "lower" light varies with the band switch for the same reason that the frequency dial calibrations read +lower+ on some bands when you advance the dial clockwise. The reason for this behavior is that Drake used either a sum of two frequencies or a difference of two frequencies to generate a third frequency, depending on the band. The sideband filters are near 9mc, the VFO runs between 4.9 and 5.5mc. This was done for economy: The sum and the difference will put you on 80m or 20m without any other mixers needed. (single conversion design on 80 and 20m). 73, Ed Knobloch TJM wrote: > I just aquired a Drake TR4c. > > It's my first "boatanchor" rig... and am still getting use to it. > > Question; > > In CW, the the Sideband switch must be on the "X" side to TX.... But as > I cycle thru the bands, some (80,15,10m)are on the wrong sideband (as > shown by the indicator light). > > Is this a problem? The manual says the freq is shifted during CW TX but > does the Drake TX on the normal ( upper above 40m ) sidebands > Or does it shift to the sideband as indicated on by the light?? > Which would make it wrong on the above listed bands. > > thanks in advance > Tom aa2vk > aa2vk@arrl.org Article: 100529 of rec.radio.amateur.boatanchors From: novatech@eskimo.com (Steven Swift) Subject: Re: Variable Regulated Tube Power Supplies. Date: 5 Nov 2005 22:28:38 GMT Message-ID: References: "west" writes: >Hello Steve, >Thanks for the interesting PS links. I'm not sure of their HT current >capabilities. I've been wanting to make a good bench HT, Fil, & Bias supply, >for a while now. I have a few ham radio PS that don't quite make it.. The >major drawback is that the Xfrs are only capable of 100ma. At times I could >use a little more that 400ma. Hopefully, someone reading this thread will >come up with a viable suggestion. >Cordially, >west The best high current PS I have seen uses the same topology as the GE 1-compactron one but uses several 6080 (6AS7) in parallel. I have an old transformer I am saving for that kind of thing that puts out 650Vct at 850mA. I have a TV transformer that is 550 at 250mA, but it is being saved also. That's alot of iron. The basic block will work for any load, just get enough current handling. Good luck. Steve. -- Steven D. Swift, novatech@eskimo.com, http://www.novatech-instr.com NOVATECH INSTRUMENTS, INC. P.O. Box 55997 206.301.8986, fax 206.363.4367 Seattle, Washington 98155 USA Article: 100530 of rec.radio.amateur.boatanchors From: novatech@eskimo.com (Steven Swift) Subject: Re: Variable Regulated Tube Power Supplies. Date: 5 Nov 2005 23:21:31 GMT Message-ID: References: "west" writes: >Hello Steve, >Thanks for the interesting PS links. I'm not sure of their HT current >capabilities. I've been wanting to make a good bench HT, Fil, & Bias supply, >for a while now. I have a few ham radio PS that don't quite make it.. The >major drawback is that the Xfrs are only capable of 100ma. At times I could >use a little more that 400ma. Hopefully, someone reading this thread will >come up with a viable suggestion. >Cordially, >west If you are willing to use transistors in your variable supply, along with a fan and a big heatsink, it is quite easy to get 400mA up to about 350V. For example, Hammond makes the 378CX, which is rated for 465mA of DC. You then use mosfets, which can easily handle the current if you keep them cool. The B+ part of this schematic, http://novatech-instr.com/PDF_files/ps_ss.pdf, for example, is an exact copy of the GE 1-compactron PS, but done with solid-state parts. Obviously, a lot of scaling needs to be done (MPSA42 is only good to 300V). This particular one was done for 90v. If you design it to cover 50-350 at 400mA, then you are going to burn 120watts worst case. That will require a fan, big heatsink and several paralleled Fets, but it will work just fine. I wasn't interested in spending that much on parts. Steve -- Steven D. Swift, novatech@eskimo.com, http://www.novatech-instr.com NOVATECH INSTRUMENTS, INC. P.O. Box 55997 206.301.8986, fax 206.363.4367 Seattle, Washington 98155 USA Article: 100531 of rec.radio.amateur.boatanchors From: chris+news@suslowicz.org (Chris Suslowicz) Subject: Re: Variable Regulated Tube Power Supplies. Date: Sat, 05 Nov 2005 23:48:02 +0000 Message-ID: References: In article , novatech@eskimo.com (Steven Swift) wrote: >The best high current PS I have seen uses the same topology as the GE >1-compactron one but uses several 6080 (6AS7) in parallel. 6080s are good for this. I used to have a regulated supply from an old Ampex VR-1000 (2" reel-to-reel VTR) that delivered 250V at 6.5A. > I have an >old transformer I am saving for that kind of thing that puts out >650Vct at 850mA. I have a TV transformer that is 550 at 250mA, but it is >being saved also. That's alot of iron. At the end of the day, the transformer is goung to be the biggest (and certainly the heaviest and most expensive) single component. Quality does not come cheap. Chris. Article: 100532 of rec.radio.amateur.boatanchors From: novatech@eskimo.com (Steven Swift) Subject: Re: Variable Regulated Tube Power Supplies. Date: 6 Nov 2005 02:52:35 GMT Message-ID: References: <1131235159.827667.48820@g47g2000cwa.googlegroups.com> "Bret Ludwig" writes: > For a single secondary transformer of considerable size it's often >cheaper to have the local transformer winder to do one as a one-off. I >have had transformers in the 1500 VA class wound for me cheaper than >Peter Dahl listed them as shelf stock. Winding your own is also >possible. > Many surplus sources exist if you scrounge around as well. For many years, I worked at John Fluke Mfg. which had a transformer prototype model shop. For the 20 years I worked there, I never store bought a transformer, instead using the prototype shop after hours. At Novatech, I can wind small devices, but not the big iron stuff. Steve. -- Steven D. Swift, novatech@eskimo.com, http://www.novatech-instr.com NOVATECH INSTRUMENTS, INC. P.O. Box 55997 206.301.8986, fax 206.363.4367 Seattle, Washington 98155 USA Article: 100533 of rec.radio.amateur.boatanchors Subject: Re: Viking Ranger and PTT From: Darrell References: Message-ID: Date: Sun, 06 Nov 2005 03:31:49 GMT Lazy Senior wrote in news:tZ9bf.8302$Q27.7853 @trnddc02: > Darrell wrote: >> No problem. Just use a diode and filter capacitor and tie it to the >> filament line. I've done it. It will work fine. >> >> 73, >> Darrell, WA5VGO > > This sounds interesting and maybe easier than the 10,000 ohm relay > route. And drawbacks to using the filament power? > > Lazy Senior > No problems at all. I use a 6 volt dc relay, a diode and a 500 uF 25 VDC capacitor. I've done it to a couple of Rangers. It works perfectly. 73, Darrell, WA5VGO Article: 100535 of rec.radio.amateur.boatanchors From: Lazy Senior Subject: Re: Viking Ranger and PTT References: Message-ID: Date: Sun, 06 Nov 2005 14:01:43 GMT Darrell wrote: > > No problems at all. I use a 6 volt dc relay, a diode and a 500 uF 25 VDC > capacitor. I've done it to a couple of Rangers. It works perfectly. > > 73, > Darrell, WA5VGO Darrell Thanx, this appears to be a great idea and I am going to try it. Lazy Senior Article: 100536 of rec.radio.amateur.boatanchors From: "GHB" Subject: HURRICANE 350 AMP Message-ID: Date: Sun, 06 Nov 2005 19:37:11 GMT Anyone know where I can get a schematic for this amp? Article: 100537 of rec.radio.amateur.boatanchors From: et472@FreeNet.Carleton.CA (Michael Black) Subject: Re: HURRICANE 350 AMP Date: 6 Nov 2005 21:16:22 GMT Message-ID: References: "gb" (onw9mapsgb@no.arrl.spam.net) writes: > Bi-polar solid-state designs were largely copies from Motorola application > notes (Helge Granberg) - without credit or royalties paid to Motorola. > You will find MRF (Motorola) or 2SC (Toshiba or other Japanese mfg) > transistors. > I'm not sure that wording is fair. By definition, application notes are done by a semiconductor manufacturer to sell the devices. They aren't selling design, they are selling the transistors or ICs. If an application note sells more devices, then it's a success. Note that in many cases for ICs, there is a fairly fixed means of using the IC, which was seen by the manufacturer from the start. If they didn't show you how the IC was intended to be used, then the IC isn't of much use. If semiconductor manufacturers were expecting credit and/or royalties, they'd either not be giving out the application notes. Michael VE2BVW