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21. Re: [Amps] meter (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Wed, 20 Jun 2007 19:47:42 -0400
The HM-102 uses the same meter Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2007-06/msg00102.html (7,409 bytes)

22. Re: [Amps] Replacement Power Supply LK-550 (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Fri, 22 Jun 2007 20:05:30 -0400
The LK550 external box is only the transformer. There is no reason the L4B transfomer cant be used however you should either pull one of the tubes or run reduced drive as that xfmr wont last long try
/archives//html/Amps/2007-06/msg00120.html (8,229 bytes)

23. Re: [Amps] Resistor Types (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Sat, 23 Jun 2007 14:14:10 -0400
I still have fond memories of working for High Voltage Engineering Corp back in the 69-70 era. Our typical product was 200-500KV @ 100-200ma power supplies primarily used in textile processing. There
/archives//html/Amps/2007-06/msg00126.html (8,535 bytes)

24. Re: [Amps] Kenwood TL-922A Amp (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Sun, 24 Jun 2007 12:36:57 -0400
The most obvious things to check would be the TX/RX relay contacts welded in RX or a blown RF coupling cap at the filaments. Since you have idle current the DC path is OK. Carl KM1H _________________
/archives//html/Amps/2007-06/msg00138.html (8,479 bytes)

25. Re: [Amps] Swan Mark VI B 6 meter Amp (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Tue, 26 Jun 2007 11:26:17 -0400
Its no different than any other old amp, especially one that has been sitting for years. Start with the PS caps and go from there. Keep playing with it without fixing and you will have a blown transf
/archives//html/Amps/2007-06/msg00144.html (8,985 bytes)

26. Re: [Amps] Chokes (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Wed, 27 Jun 2007 19:31:19 -0400
Your question certainly did appear. I was about to answer but got distracted. As long as the reactance on 160M is roughly 10 times or more than the input impedence it will be fine. In your case it is
/archives//html/Amps/2007-06/msg00162.html (7,995 bytes)

27. Re: [Amps] Slightly OT.... (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Thu, 28 Jun 2007 10:19:11 -0400
IF they are not SS, the welders are simple oscillators and use tubes not rated for linear modes. Medical equipment uses high linearity tubes such as versions of 8874, 3CX800A7, 8877, etc. Lots of goo
/archives//html/Amps/2007-06/msg00169.html (8,470 bytes)

28. Re: [Amps] Slightly OT.... (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Thu, 28 Jun 2007 12:02:33 -0400
Yes, if you dont mind low gain and high drive requirements as well as neutralization. The Europeans often use Thompson or Seimens triodes which are not easily found surplus. I had a contract several
/archives//html/Amps/2007-06/msg00173.html (8,143 bytes)

29. Re: [Amps] Filament Choke (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Thu, 28 Jun 2007 21:15:17 -0400
Stranded & insulated can be used but it is very hard to form and control it on a ferrite rod. You can try tape or shrink tubing. Also consider the steady current and heat generated. At HF the perform
/archives//html/Amps/2007-06/msg00176.html (7,606 bytes)

30. Re: [Amps] HV filter caps, diodes needed (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Fri, 29 Jun 2007 09:26:53 -0400
Thats what happens when underated parts are used by an unknowing builder more interested in saving a few bucks. Throw them all away and get something that will hold up. The ONLY caps I would use in t
/archives//html/Amps/2007-06/msg00179.html (8,873 bytes)

31. Re: [Amps] 572B (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Sun, 1 Jul 2007 17:29:07 -0400
I have a pair of Amperex here. Also GE and Raytheon plus several private labeled versions such as Dentron, Waters, Hunter. The shape/size of the bulb, the black base and style of lettering tells me t
/archives//html/Amps/2007-07/msg00015.html (8,127 bytes)

32. Re: [Amps] Dentron 1200L (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Sun, 1 Jul 2007 17:36:08 -0400
Its 12VDC and will work with the 570 Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2007-07/msg00016.html (9,963 bytes)

33. Re: [Amps] tubes?? (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Tue, 3 Jul 2007 09:12:56 -0400
The 572B was originally the Taylor T160L but Taylor was on the way out and Cetron took over. There are several conflicting stories of the business politics involved. Since AM was in a steep decline C
/archives//html/Amps/2007-07/msg00021.html (8,675 bytes)

34. Re: [Amps] tubes?? (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Wed, 4 Jul 2007 08:17:06 -0400
The last info I could find on Taylor was for 1958. I have several of their old bottles as well as some H&K. It appears that Cetron bought out RCA's 811A line but I dont know the year. They produced t
/archives//html/Amps/2007-07/msg00027.html (8,017 bytes)

35. [Amps] Fw: Rohn 45G items wanted and sell/swap (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Fri, 6 Jul 2007 10:13:44 -0400
I need the following in any combination: BPL45G Short flat top adaptor or 45AG4 top section HBUTVRO Heavy duty house bracket, 2 needed AS455G Accessory shelf (rotator shelf) 45G Regular section, anyt
/archives//html/Amps/2007-07/msg00047.html (6,926 bytes)

36. Re: [Amps] AL-80A tube glow (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Sat, 7 Jul 2007 09:16:21 -0400
Id say thats pushing the 3-500Z a bit too much. Drop the drive down to 60-70W and the grid current to 125-150ma and the tube will thank you by working much longer. At 600-700W the difference at the o
/archives//html/Amps/2007-07/msg00066.html (8,712 bytes)

37. Re: [Amps] Alpha 91B on 6M - Clarification (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Sat, 7 Jul 2007 14:42:09 -0400
Ignoring all the switching changes that would be required there simply isnt low enough C in the Tune cap and associated distributed C to resonate on 6M with any sort of realistic L. Converting a SB-2
/archives//html/Amps/2007-07/msg00074.html (8,250 bytes)

38. Re: [Amps] TL-922 current/output etc (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Sat, 7 Jul 2007 14:46:12 -0400
I wouldnt run it on 120V at much over 600W unless you have a real stiff ~25A feed. On 240V you can expect 1200-1300W key down with 80-100W drive. Ip 800ma; Ig 250ma is typical when properly loaded. C
/archives//html/Amps/2007-07/msg00075.html (8,654 bytes)

39. Re: [Amps] Transformer question (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Sun, 8 Jul 2007 10:43:43 -0400
Maybe Im a little dense but I have no idea what you are asking. If the plate transformer runs on 240 and the rest on 120 you do not need a separate 120 line. Simply use one leg of the 240 line agains
/archives//html/Amps/2007-07/msg00085.html (7,680 bytes)

40. Re: [Amps] Transformer question (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Sun, 8 Jul 2007 13:40:53 -0400
So then why do amps that offer 120/240 VAC options do it that way? The NEC manual for Resedential Wiring requires both a neutral and a ground at the panel as well as in the distribution wiring. For
/archives//html/Amps/2007-07/msg00088.html (8,438 bytes)

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