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21. [Amps] Fw: GU-84B Cooling (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Tue, 19 Jul 2005 23:19:26 +0200
Will, In my twin tube GU84B amp one fan is used to pressurize the subchassis and two axial fans to draw the air out. With a B+ of 2900 VDC, from the 3 phase PSU the two GU84B tubes generate an easy 6
/archives//html/Amps/2005-07/msg00217.html (8,781 bytes)

22. Re: [Amps] GU-84B Cooling (score: 1)
Author: pa3duv@planet.nl
Date: Wed, 20 Jul 2005 13:47:04 +0200
Van pa3duv@planet.nl Verstuurd op woensdag, juli 20, 2005 11:49 am Aan Will Matney <craxd@engineer.com> Cc Bcc Onderwerp Re: [Amps] GU-84B Cooling Will, Perhaps I could measure the anode cooler tempe
/archives//html/Amps/2005-07/msg00222.html (14,013 bytes)

23. Re: [Amps] GU-84B Cooling (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Wed, 20 Jul 2005 13:56:01 +0200
oops.. UV should read IR... Thanks Rich. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2005-07/msg00224.html (15,789 bytes)

24. Re: [Amps] GU-84B Cooling (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Wed, 20 Jul 2005 15:53:37 +0200
Some info from: http://www.angelfire.com/nb/ni4l/gu84b.html The GU-84B is a ceramic-metal forced-air cooled tetrode intended for use in power amplifiers with distributed amplification and for SSB-sig
/archives//html/Amps/2005-07/msg00230.html (13,342 bytes)

25. Re: [Amps] 4CX250 bases (David Kirkby) (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Sun, 24 Jul 2005 00:02:07 +0200
The same in my mobile HF system. When the Henry SS750 kicks in on 40 meters at 1.1 KW, the aircon fan starts to increase speed. Cheers, Dick PA3DUV _______________________________________________ Amp
/archives//html/Amps/2005-07/msg00282.html (9,139 bytes)

26. Re: [Amps] Mobile Amps (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Mon, 01 Aug 2005 00:41:27 +0200
Will and others, Check this out: http://home.hetnet.nl/~l.van.lelieveld/index.html Very interesting site aboute "make overs" of CB amps for amateur radio legal and linear use. Too bad the text is in
/archives//html/Amps/2005-07/msg00372.html (19,131 bytes)

27. Re: [Amps] RE : Another metalwork question (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Thu, 04 Aug 2005 07:17:56 +0200
That will never happen. They rather bring their production and engineering over to China. Dick Why you guys dont adopt the metric sys.........? Its that more simple for every body. Seems European ado
/archives//html/Amps/2005-08/msg00077.html (17,433 bytes)

28. Re: [Amps] Metric Conversion (score: 1)
Author: pa3duv@planet.nl
Date: Thu, 11 Aug 2005 13:34:03 +0200
Most likely the design and parts used in Motorola producs is all made in PRC. The low price of Chinese producs is the heroin for the Western markets. Wait until the addiction is there and the pusherm
/archives//html/Amps/2005-08/msg00402.html (15,683 bytes)

29. Re: [Amps] Mobile amps (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Sun, 14 Aug 2005 22:45:25 +0200
I found the difference between 6 kw and 1.2 kw from the mobile neglectible. Also the centerloaded vertical did not like 6 kW, so I settled for running QRP from the automobile, using the Henry SS750 o
/archives//html/Amps/2005-08/msg00505.html (8,110 bytes)

30. Re: [Amps] Who makes the best mobile amp? (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Sun, 14 Aug 2005 22:46:22 +0200
Jack, I have used the following amps in my automobile: SG500 Henry SS750 2 x SG500 into a combiner. You will find the the power generation capability of your electrical system AND the power handling
/archives//html/Amps/2005-08/msg00506.html (8,460 bytes)

31. Re: [Amps] Palstar DL5K 5KW load (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Wed, 31 Aug 2005 16:12:12 +0200
However, there are some minor flaws in the design of the DL5K. First the long silver plated wire from the UHF connector to the resistors is hanging on the solder joint of the UHF connector. The cheap
/archives//html/Amps/2005-08/msg00770.html (8,840 bytes)

32. Re: [Amps] Palstar DL5K 5KW load (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Wed, 31 Aug 2005 18:56:09 +0200
In the Netherlands 400 watt is the legal limit on HF. All PA contest stations stay to this limit, also the ones with 3 hole GU74 amps. Since I do not participate in contests I use the twin GU84B for
/archives//html/Amps/2005-08/msg00779.html (11,614 bytes)

33. Re: [Amps] Palstar DL5K 5KW load (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Wed, 31 Aug 2005 22:40:10 +0200
Harold, Further to your posting concerning the 5 kW dummyload from Palstar I have checked the VSWR on 80 and 20 meters and could not find anything unusual. I measured under the following conditions:
/archives//html/Amps/2005-08/msg00791.html (9,201 bytes)

34. [Amps] Emtron DX15 (score: 1)
Author: pa3duv@planet.nl
Date: Fri, 16 Sep 2005 12:54:49 +0200
All seems to be quiet on the QRO front. Or is it the calm before the storm? http://groups.yahoo.com/group/emtrondx15 73, Dick Knol PA3DUV _______________________________________________ Amps mailing
/archives//html/Amps/2005-09/msg00134.html (6,241 bytes)

35. Re: [Amps] Emtron DX14 or DX15 (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Sat, 17 Sep 2005 15:23:58 +0200
Marc, what's the point in upgrading from 2000 watt to 3000 watt? Nobody will notice the difference. As I see it a +6dB version comes first. However, that gap is already filled with the Emtron DX4 wit
/archives//html/Amps/2005-09/msg00171.html (9,042 bytes)

36. Re: [Amps] RS-232 (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Sun, 18 Sep 2005 09:03:10 +0200
All the state of the art multi-million Euro machines in my factory communicate using RS232. Comms problems would cause huge damages so there's no USB. The USB comms in my USB only HP E-PC used in my
/archives//html/Amps/2005-09/msg00199.html (10,093 bytes)

37. [Amps] User manual Emtron DX4 (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Wed, 21 Sep 2005 23:02:16 +0200
The user manual including circuit diagrams of the Emtron DX4 HF amplifier (2 x GU84B) can be found at: http://groups.yahoo.com/group/emtrondx15/files/Emtron User Manuals/emtron DX4 manual D.pdf Cheer
/archives//html/Amps/2005-09/msg00272.html (6,700 bytes)

38. [Amps] Emtron DX-4 twin GU84B amp pictures (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Thu, 22 Sep 2005 22:49:04 +0200
Pictures of the Emtron DX-4 twin GU84B HF amplifier inside: see link below http://photos.groups.yahoo.com/group/emtrondx15/lst?.dir=/Emtron+DX-4+pictures&.src=gr&.order=&.view=t&.done=http%3a//briefc
/archives//html/Amps/2005-09/msg00299.html (6,535 bytes)

39. [Amps] twin 4CX10 000D amp and more (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Tue, 25 Oct 2005 16:41:48 +0200
Gentlemen, For those interested in RF amplifiers this site might be interesting (thanks Hans) http://www.bear-el.com/ I particulary like this twin 4CX 10 000D design. http://ns.iizuka-net.ne.jp/~bear
/archives//html/Amps/2005-10/msg00575.html (6,413 bytes)

40. Re: [Amps] High Voltage cable - fitting into SHV type plugs (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Tue, 25 Oct 2005 21:07:44 +0200
A commercial HF amplifier manufacturer uses silicone insulated cable which is used in neon lighting applications. Check this link: http://www.bambachcables.com.au/other.htm and search in this page fo
/archives//html/Amps/2005-10/msg00578.html (9,354 bytes)

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