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Total 47 documents matching your query.

21. Re: [Amps] B&W 850A Repair (score: 1)
Author: "Jim Hargrave" <w5ifp@gvtc.com>
Date: Sat, 27 Oct 2012 08:36:28 -0500
That's what I like...A man of positive convictions.....hi 73s de Jim W5IFP _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/l
/archives//html/Amps/2012-10/msg00177.html (14,198 bytes)

22. Re: [Amps] plate voltage meter shunt (score: 1)
Author: "Jim Hargrave" <w5ifp@gvtc.com>
Date: Sat, 3 Nov 2012 19:01:21 -0500
Doug, Depending on the type of bleeder, you might consider connecting the voltmeter near the bottom of the bleeder string. 73s de Jim W5IFP _______________________________________________ Amps mailin
/archives//html/Amps/2012-11/msg00030.html (8,471 bytes)

23. Re: [Amps] Anyone recognize this amp / circuit? (score: 1)
Author: "Jim Hargrave" <w5ifp@gvtc.com>
Date: Wed, 20 Mar 2013 16:52:08 -0500
Mark, Try the 1987 ARRL handbook. The 2x4-400 amp is described on page 30-40. Title "An economy 2 KW Amplifier" I built mine (2 tubes) from scratch in 1979. I switch sections of BC-610 RF coils for t
/archives//html/Amps/2013-03/msg00284.html (10,580 bytes)

24. Re: [Amps] Dentron Clippertion L band switch advice. (score: 1)
Author: "Jim Hargrave" <w5ifp@gvtc.com>
Date: Tue, 23 Apr 2013 16:45:14 -0500
John, The Clipperton-L is a really good amp and should be worth restoring. Having said that, I have a recommendation. Since your immediate plans is for 75M. I would suggest you hardwire the band swit
/archives//html/Amps/2013-04/msg00196.html (8,585 bytes)

25. [Amps] Fwd: Re: Weird tubes in an amplifier (score: 1)
Author: Jim Hargrave <w5ifp@gvtc.com>
Date: Wed, 29 Jan 2014 15:11:59 -0600
Mark, The VT4C is a Army designation for the 211 tube. Google it and you get several hits I sent you a PDF file. Jim w5ifp@gvtc.com On 1/28/2014 9:24 PM, Mark wrote: Just when I thought I had heard o
/archives//html/Amps/2014-01/msg00298.html (8,072 bytes)

26. Re: [Amps] 3-500Zs inverted (score: 1)
Author: Jim Hargrave <w5ifp@gvtc.com>
Date: Thu, 03 Apr 2014 16:55:45 -0500
Pete, Aren't you glad you asked?...(:-> Jim w5ifp@gvtc.com On 4/3/2014 8:19 AM, Pete Smith N4ZR wrote: I need to trouble-shoot my QSK system, which is built into my SB-220. Will it do any harm to app
/archives//html/Amps/2014-04/msg00037.html (7,654 bytes)

27. Re: [Amps] 4Z4RB amplifiers (score: 1)
Author: Jim Hargrave <w5ifp@gvtc.com>
Date: Wed, 02 Jul 2014 10:19:05 -0500
Fine print on hi-power board says the transistors are NOT included.....another $$$ ? I personally would not be comfortable purchasing any SS amp without the transistors pre-installed and tested. Jim
/archives//html/Amps/2014-07/msg00006.html (8,860 bytes)

28. Re: [Amps] Info on HP power supply (score: 1)
Author: Jim Hargrave <w5ifp@gvtc.com>
Date: Tue, 08 Jul 2014 09:59:48 -0500
It readily translates to English using Google Chrome. Jim w5ifp@gvtc.com I don know if this is exactly the same power supply. Please check: http://elweb.info/dokuwiki/doku.php?id=hp_3kw_netzteil_als_
/archives//html/Amps/2014-07/msg00026.html (10,477 bytes)

29. Re: [Amps] Info on HP power supply (score: 1)
Author: Jim Hargrave <w5ifp@gvtc.com>
Date: Tue, 08 Jul 2014 21:47:22 -0500
Chris, That particular site does not show a schematic, However it has some very nice photos and mod detail to allow voltage adjustment, Hello Jim, It readily translates to English using Google Chrome
/archives//html/Amps/2014-07/msg00035.html (8,761 bytes)

30. Re: [Amps] SB-200 input. (score: 1)
Author: Jim Hargrave <w5ifp@gvtc.com>
Date: Sat, 26 Jul 2014 11:24:33 -0500
The Dentron CM1,2 & U series of external input tuners are fixed broad band filters, It uses a parallel circuit on 160m and PI-L on 80/40/20 with PI on 15/10. The manual only specifies a "length" of R
/archives//html/Amps/2014-07/msg00118.html (9,850 bytes)

31. Re: [Amps] THE SKINNY ON MY AL-82 (score: 1)
Author: "Jim Hargrave" <w5ifp@gvtc.com>
Date: Tue, 23 Dec 2014 16:33:09 -0600
Carl, That is good info. If I ever need a NOS resistor for my 1925 "Walbert Issofarad" 4 stage TRF, I'll know who to contact. 73, Jim - w5ifp@gvtc.com handful south? it ______________________________
/archives//html/Amps/2014-12/msg00083.html (13,278 bytes)

32. Re: [Amps] Alpha Input SWR (score: 1)
Author: "Jim Hargrave" <w5ifp@gvtc.com>
Date: Sat, 10 Jan 2015 10:27:18 -0600
Collins Radio recommends a 20.5 ft. coax between exciter and linear amp. Perhaps this would work with the Alpha. 73, Jim - w5ifp@gvtc.com _______________________________________________ Amps mailing
/archives//html/Amps/2015-01/msg00020.html (6,678 bytes)

33. Re: [Amps] Two Tone Testing (score: 1)
Author: "Jim Hargrave" <w5ifp@gvtc.com>
Date: Mon, 13 Apr 2015 20:50:13 -0500
Don, Try NCH http://www.nch.com.au/index.html They have a generator that produces Sine, square, triangle or sawtooth. Single or 2 tone. 73, Jim - w5ifp@gvtc.com than _________________________________
/archives//html/Amps/2015-04/msg00093.html (8,092 bytes)

34. Re: [Amps] Strange behavior (at least to me) (score: 1)
Author: "Jim Hargrave" <w5ifp@gvtc.com>
Date: Thu, 28 May 2015 09:50:37 -0500
Steve, It sounds like a bad connection on the variable capacitor. It could be external or inside the bottle. Depending on the construction of the capacitor, you may or may not be able to fix it. In s
/archives//html/Amps/2015-05/msg00206.html (12,274 bytes)

35. Re: [Amps] Ham sells fine grit thing to clean contacts (score: 1)
Author: "Jim Hargrave" <w5ifp@gvtc.com>
Date: Sun, 16 Aug 2015 20:13:56 -0500
Sandpaper is a no no on relay contacts. It leaves minute sand particles imbedded in the contacts, especially silver plated ones. Use a metal contact file or good grade of extra fine Emory cloth. 73,
/archives//html/Amps/2015-08/msg00050.html (8,717 bytes)

36. Re: [Amps] Ham sells fine grit thing to clean contacts (score: 1)
Author: "Jim Hargrave" <w5ifp@gvtc.com>
Date: Mon, 17 Aug 2015 08:23:47 -0500
See comment embedded below. it will be a few weeks until I get whatever this man sells, but it is very unlikely sandpaper coated with silica only. "EmEry" Emery on paper for fine grinding is mostly a
/archives//html/Amps/2015-08/msg00058.html (12,096 bytes)

37. Re: [Amps] Amp output power (score: 1)
Author: "Jim Hargrave" <w5ifp@gvtc.com>
Date: Tue, 25 Aug 2015 14:57:07 -0500
I homebrewed a pair of Eimac 4-400As GG in 1979 and it's still going strong. I treat it gently since I don't have any spares. It loads better on 10/15m than my Clipperton L, which which still has ori
/archives//html/Amps/2015-08/msg00097.html (11,740 bytes)

38. Re: [Amps] Need pilot lamp for DTR-2000 (score: 1)
Author: "Jim Hargrave" <w5ifp@gvtc.com>
Date: Wed, 28 Oct 2015 18:48:25 -0500
Charly, I think you will find a clear PL-382 bulb inside of the colored housing. It is replaceable. Google PL-382 will bring up multiple sources, including E-PAY where you can buy a package of 10 bul
/archives//html/Amps/2015-10/msg00061.html (7,930 bytes)

39. Re: [Amps] Control transformers (score: 1)
Author: "Jim Hargrave" <w5ifp@gvtc.com>
Date: Mon, 11 Apr 2016 14:13:27 -0500
Gerald, Comments embedded below: 73, Jim - w5ifp@gvtc.com If current light to parallel [W5IFP] Did you really mean "connected in parallel" ? You can't run it this way but fine for a brief test. The b
/archives//html/Amps/2016-04/msg00022.html (11,855 bytes)

40. Re: [Amps] COST OF AMPS/RIGS (score: 1)
Author: "Jim Hargrave" <w5ifp@gvtc.com>
Date: Tue, 6 Dec 2016 18:45:47 -0600
Nope...but the 6L6 made a great AM Heising modulator for a 4E27 final. 73, Jim - w5ifp@gvtc.com clever. I _______________________________________________ Amps mailing list Amps@contesting.com http://
/archives//html/Amps/2016-12/msg00154.html (8,281 bytes)

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