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Total 573 documents matching your query.

21. Re: [Amps] Plate Choke Resonances (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Thu, 28 Jan 2010 18:38:59 -0800
You didn't. I came up with the same results. A big fat resonance in the middle of 20 meters. I posted my results a few weeks ago here on the list. I think Ameritron uses #29 wire. I have my re-wound
/archives//html/Amps/2010-01/msg00410.html (9,195 bytes)

22. Re: [Amps] Good amp to buy maybe build (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Sun, 31 Jan 2010 15:16:15 -0800
A sign I saw in a automobile wrecking yard... All cars run on used parts! Think about that one.. then rethink the statement you have made about your homebrew amplifier having used parts. I'm not sure
/archives//html/Amps/2010-01/msg00605.html (8,564 bytes)

23. [Amps] 8877 Homebrew Pictures (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Sun, 31 Jan 2010 19:59:22 -0800
For those that like amplifier pictures, here are a few of my 8877 project. I'll be adding more soon. http://s900.photobucket.com/albums/ac206/w7ry/8877%20Amplifier/ Enjoy 73 Jim W7RY ________________
/archives//html/Amps/2010-01/msg00625.html (6,730 bytes)

24. Re: [Amps] HV relay (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Thu, 4 Feb 2010 20:53:14 -0800
What would you use an anode HV switch for? 73 Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2010-02/msg00116.html (7,325 bytes)

25. Re: [Amps] HV relay (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Fri, 5 Feb 2010 12:16:22 -0800
No. The tube is cut off. No plate current flows when the tube is cut off (biased off). And yes it does make things simpler than you were thinking! You need to find and study schematics of amplifiers
/archives//html/Amps/2010-02/msg00126.html (10,503 bytes)

26. Re: [Amps] QRO Questions (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Fri, 5 Feb 2010 12:37:31 -0800
If you need 2" gas filled coax to your antenna.... You're probably running WAY to much power. If you need grease Zerks on your electric meter..... You're probably running WAY to much power. Feel free
/archives//html/Amps/2010-02/msg00127.html (10,347 bytes)

27. Re: [Amps] Blower for Henry 2KD-5 (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Sun, 7 Feb 2010 22:19:26 -0800
Look for a Papst or EBM blower. German made and very high quality. They have on line and down loadable catalogs. These are what Ameritron uses in their amps. I have one in my new home brew 8877 amp.
/archives//html/Amps/2010-02/msg00220.html (8,193 bytes)

28. Re: [Amps] DRAKE L-7 (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Mon, 8 Feb 2010 08:22:58 -0800
Does it do it when connected to a dummy load? If the answer is no, then you have RF in your shack. Move your antenna. 73 Jim W7RY _______________________________________________ Amps mailing list Amp
/archives//html/Amps/2010-02/msg00242.html (7,773 bytes)

29. Re: [Amps] Reed Relay for QSK (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Mon, 8 Feb 2010 16:50:24 -0800
Why a 4PDT relay? The DPDT are much faster. 73 Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2010-02/msg00264.html (7,792 bytes)

30. Re: [Amps] resistor before the cap redux (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Wed, 10 Feb 2010 07:49:54 -0800
* That was my first thought! 73 Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2010-02/msg00298.html (13,388 bytes)

31. Re: [Amps] Henry 2KD-5 HV Drop (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Thu, 11 Feb 2010 12:48:55 -0800
Only problem is his AL-82 blower was set to the lowest speed. The AL-82 has a multi tap primary on the filament transformer. They use that to be able to change the voltage to the blower. You can rig
/archives//html/Amps/2010-02/msg00320.html (8,060 bytes)

32. Re: [Amps] Icom 551 with amplifier (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Wed, 10 Feb 2010 07:16:07 -0800
Standard male Molex plug. Plug and male pins are available at Mouser. www.mouser.com The size is .063 as I remember. 73 Jim W7RY _______________________________________________ Amps mailing list Amps
/archives//html/Amps/2010-02/msg00354.html (8,376 bytes)

33. Re: [Amps] WTB: Amp supply LK-500 Filament Transformer (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Sat, 13 Feb 2010 11:48:36 -0800
"dig" the center tap out of the transformer and re-solder it. You may have to peel some paper back to do it. Give it a try! 73 Jim W7RY _______________________________________________ Amps mailing li
/archives//html/Amps/2010-02/msg00370.html (7,792 bytes)

34. [Amps] TL-922 (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Sun, 14 Feb 2010 19:06:49 -0800
I'm just finished adding QSK to a TL-922. I also put a .01 6kv at the base of the plate choke. I was tuning the amp on 20 meters and the cap blew up and shorted. Blew the fuses before it took out the
/archives//html/Amps/2010-02/msg00392.html (7,046 bytes)

35. Re: [Amps] Tentec Titan 425 with GU74-B???? (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Mon, 15 Feb 2010 12:33:22 -0800
4CX800 was a dream of George Badger and Bob Alprin. I summise that they were trying to get the Svetlana tubes onto the market and use a number that was more recciginazable thatn Gu74b. It never did t
/archives//html/Amps/2010-02/msg00415.html (13,496 bytes)

36. Re: [Amps] 4cx800a (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Mon, 15 Feb 2010 21:10:07 -0800
They probebly have to drive them too hard to hard so the IMD is poor. I had a pair and tried to build an amp with them. I could not get it to put out 1500 watts and stay within the specifications tha
/archives//html/Amps/2010-02/msg00428.html (11,252 bytes)

37. Re: [Amps] EBM Fan (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Thu, 18 Feb 2010 14:39:17 -0800
The EBM blower that I have in my 8877 amp is 230-240 volts. And has a run cap as well. 73 Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.com http://lists.c
/archives//html/Amps/2010-02/msg00525.html (8,118 bytes)

38. Re: [Amps] 120 cycle hum from Henry 2K-4 (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Thu, 18 Feb 2010 17:10:13 -0800
Or you have a ground loop or audio issue with this setup. I see that you have no hum with the SB200. 73 Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.com
/archives//html/Amps/2010-02/msg00532.html (9,919 bytes)

39. Re: [Amps] SB-221 Problem - Slow on the uptake (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Thu, 18 Feb 2010 17:14:35 -0800
Sounds like your exciter has a problem...Or it has a problem with the load (amplifier). Why not simply key the amplifier BEFORE you put the rig into transmit mode? 73 Jim W7RY _______________________
/archives//html/Amps/2010-02/msg00533.html (8,391 bytes)

40. Re: [Amps] KW Dummy load resistors? (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Thu, 18 Feb 2010 20:19:51 -0800
Mouser has these: http://www.mouser.com/catalog/catalogUSD/641/670.pdf They also have others. See their catalog pages 656 to 670. 73 Jim W7RY _______________________________________________ Amps mail
/archives//html/Amps/2010-02/msg00544.html (7,855 bytes)

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