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Total 39 documents matching your query.

21. [Amps] Bypassing electrolytic capacitor stacks (score: 1)
Date: Wed, 8 Dec 2010 10:56:22 EST
In a thread a couple of months back, there were comments about keeping RF out of the stack of electrolytics in a power supply. The suggestion was to bypass the stack with a .001 MFD HV disc. Does it
/archives//html/Amps/2010-12/msg00067.html (6,588 bytes)

22. [Amps] Henry 3000D Six meter conversion (score: 1)
Date: Mon, 20 Dec 2010 10:52:41 EST
A number of folks on this reflector are in progress of converting the Henry 2000D/3000D commercial amplifiers to 6 meters. There is a wonderful show and tell on this subject on W7GJ's website _http:/
/archives//html/Amps/2010-12/msg00284.html (7,754 bytes)

23. Re: [Amps] Transformer-LESS advice (score: 1)
Date: Fri, 14 Jan 2011 16:13:06 EST
Rob, I remember seeing these power supplies advertised in QST a few years ago. Unfortunately the manufacturer, Watts Unlimited, is no longer in business. If anyone has one of these supplies they're n
/archives//html/Amps/2011-01/msg00142.html (8,074 bytes)

24. Re: [Amps] Help with HL2200 6 meter conversion (score: 1)
Date: Sat, 22 Jan 2011 09:15:54 EST
Hi Gary, Dick K5AND is exactly right in his analysis that the amp has too much Tune capacitance. After we wrote the QST article (using an unmarked junkbox capacitor for the Tune cap) we realized that
/archives//html/Amps/2011-01/msg00229.html (14,272 bytes)

25. Re: [Amps] Measuring amp B+ (score: 1)
Date: Wed, 26 Jan 2011 17:44:56 EST
Hi Randy, I've been using my 80K6 HV probe quite successfully and safely for measuring HV in KW amp power supplies. Do follow the instructions, and my policy is to set everything up, make the connect
/archives//html/Amps/2011-01/msg00335.html (8,391 bytes)

26. [Amps] A very good experience (score: 1)
Date: Mon, 14 Feb 2011 18:06:15 EST
In working on my current 6M amp project, I decided to rebuild my HV power supply, and really do it right. I wanted to make up boards both for a generic FW rectifier assembly (each leg comprised of up
/archives//html/Amps/2011-02/msg00108.html (7,105 bytes)

27. [Amps] FS: 432 Amp project (score: 1)
Date: Sat, 26 Feb 2011 17:24:55 EST
For Sale: Major pieces of 500 Watt amplifier for 70 cm. This is one more of those projects I figured I'd get to sooner or's looking later... Includes Motorola dual cavity RF deck running a
/archives//html/Amps/2011-02/msg00189.html (7,057 bytes)

28. Re: [Amps] DIODE PIV Confusion (score: 1)
Date: Wed, 29 Jun 2011 19:20:40 EDT
Dick, the reason for the confusion is that there are indeed 2 different diodes with that designation! Mouser, for example, lists both of them. Take a look at both data sheets, and check the physical
/archives//html/Amps/2011-06/msg00332.html (8,561 bytes)

29. Re: [Amps] shaft couplers and extensions (score: 1)
Date: Fri, 26 Aug 2011 13:33:33 -0400 (EDT)
Oddball stuff is getting harder to find these days! I'm looking for a few shaft extensions, couplers, flexible couplers, right angle shaft couplers and the like for my current kluge amp project. I us
/archives//html/Amps/2011-08/msg00191.html (7,059 bytes)

30. Re: [Amps] shaft couplers and extensions (score: 1)
Date: Fri, 26 Aug 2011 20:16:19 -0400 (EDT)
Thanks to all who came up with suggestions for me, including K1FK, N7CXI, K5AND, and others whose calls weren't obvious from their email addresses. I think I could build a small intergalactic cruiser
/archives//html/Amps/2011-08/msg00201.html (8,074 bytes)

31. [Amps] Alpha 77DX problem (score: 1)
Date: Tue, 20 Sep 2011 23:24:41 -0400 (EDT)
Wonder if anyone has seen this symptom before: My amp was running fine this morning; I used it on 10 meters to work a couple of Middle East stations. I tried to put it into standby, so I could work a
/archives//html/Amps/2011-09/msg00137.html (6,698 bytes)

32. Re: [Amps] 6kW Coax (score: 1)
Date: Fri, 9 Mar 2012 23:47:44 -0500 (EST)
Dave, have you considered simply using CATV hardline? Sounds like there's no requirement for flexibility. Steve Gilbert K1SG Message: 9 Date: Fri, 9 Mar 2012 18:36:18 -0000 From: "David
/archives//html/Amps/2012-03/msg00102.html (7,346 bytes)

33. Re: [Amps] Transfer Lettering (score: 1)
Date: Wed, 14 Mar 2012 00:13:38 -0400 (EDT)
Hi Dennis, I've never been able to spell an entire word of more than 3 letters and keep it straight with transfer lettering, so I bought a Brother P-Touch Label Printer. You can connect it to your co
/archives//html/Amps/2012-03/msg00165.html (8,551 bytes)

34. [Amps] Cool transmitter! (score: 1)
Date: Thu, 26 Apr 2012 23:48:13 -0400 (EDT)
Fascinating Collins amp conversion in this you tube video from W5IG. _ ( Steve Gilbert K1SG 508-435-
/archives//html/Amps/2012-04/msg00246.html (6,400 bytes)

35. [Amps] K1FO SK (score: 1)
Date: Sun, 29 Jul 2012 20:46:53 -0400 (EDT)
I pass along this sad news, reported on the Moon-net reflector, but equally appropriate here: Date: Sat, 28 Jul 2012 22:53:39 -0400 From: "Bob McCormick W1QA" <> Subject: [Moon-Net] Steve
/archives//html/Amps/2012-07/msg00379.html (7,198 bytes)

36. Re: [Amps] THREE 3CX-15,000A7's (score: 1)
Date: Mon, 6 Aug 2012 23:45:41 -0400 (EDT)
Now that's MY kind of tube! Not only does it have handles, it even requires a KW just to light the filament! Steve Gilbert K1SG Message: 8 Date: Mon, 6 Aug 2012 10:08:51 -0700 From: "Jim
/archives//html/Amps/2012-08/msg00117.html (7,049 bytes)

37. Re: [Amps] premade HV rectifier board (score: 1)
Date: Fri, 5 Jul 2013 03:15:32 -0400 (EDT)
FAR Circuits makes a variety of power supply PC boards; you can select the board you need and populate it to meet your requirements. I designed a rectifier board using 6A10s for a 6 KV supply that FA
/archives//html/Amps/2013-07/msg00016.html (8,424 bytes)

38. [Amps] Not just an amp, a whole AM 5 KW BC Xmtr! (score: 1)
Date: Mon, 5 Aug 2013 14:48:51 -0400 (EDT)
Not mine, just thought it looked like a fun project for someone. And it is free. Do check with the XYL first, though... oa
/archives//html/Amps/2013-08/msg00044.html (6,570 bytes)

39. Re: [Amps] AL572 for DXpedition, parts to take along (score: 1)
Date: Wed, 16 Apr 2014 22:59:45 -0400 (EDT)
2 thoughts, Jeff... First, bring along the tools you need to effect these repairs. Second, maybe take an outboard blower. If you can keep the temps down, you might avoid the necessity for some of the
/archives//html/Amps/2014-04/msg00159.html (9,686 bytes)

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