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321. Re: [Amps] Mod xmfr (score: 1): Author: peter.chadwick@Zarlink.Com; Date: Mon, 11 Oct 2004 17:20:54 +0200; that, BTW!!), you might check out this site: >http://www.classeradio.com/ Real radios glow in the dark! Will this solid state rubbish ever really catch on? 73 Peter SM/G3RZP _________________________; /archives//html/Amps/2004-10/msg00153.html (7,078 bytes)
322. Re: [Amps] Looking for a design for a single 4cx250btube on 50 Mhz-six meters. (score: 1): Author: peter.chadwick@Zarlink.Com; Date: Wed, 13 Oct 2004 09:38:16 +0200; input. That's certainly more believable. However, I've seen an amp for the UK 70MHz band using one that would produce 450watts 'single tone' - i.e, a whistle into the microphone! The linearity was no; /archives//html/Amps/2004-10/msg00196.html (8,820 bytes)
323. Re: [Amps] Bandswitch source or roller inductor (score: 1): Author: peter.chadwick@Zarlink.Com; Date: Thu, 14 Oct 2004 09:22:09 +0200; The 6 way switches from the BC375 TU units are available from Fair Radio in Lima, OH. They are 1p 6way, and are a whopping$3.95 each, 10 for $32! There was an article in CQ some years ago on ganging; /archives//html/Amps/2004-10/msg00203.html (7,859 bytes)
324. Re: Re: [Amps] Advice on instruments for ham use (score: 1): Author: peter.chadwick@Zarlink.Com; Date: Fri, 26 Nov 2004 09:27:09 +0000; Of course, Tektronix was started by people who left HP when HP didn't want to do advanced scopes. 73 Peter G3RZP _______________________________________________ Amps mailing list Amps@contesting.com; /archives//html/Amps/2004-11/msg00434.html (8,094 bytes)
325. Re: [Amps] Question: Ameritron AL-80A tuning (score: 1): Author: peter.chadwick@Zarlink.Com; Date: Wed, 1 Dec 2004 18:02:56 +0100; What's the input SWR? I'd suspect the input tuned circuits may be so far out that you're exciter is shutting down and the amp isn't getting much drive. 73 Peter, temporarily SM/G3RZP "NW7US, Tomas" <; /archives//html/Amps/2004-12/msg00003.html (9,422 bytes)
326. Re: [Amps] RCA module -- curiosity killed the cat (score: 1): Author: peter.chadwick@Zarlink.Com; Date: Thu, 9 Dec 2004 08:44:28 +0000; Could be a CATV module - RCA did a lot of those. 73 Peter G3RZP _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2004-12/msg00144.html (7,472 bytes)
327. Re: [Amps] Help on Aerovox capacitor (score: 1): Author: peter.chadwick@Zarlink.Com; Date: Fri, 17 Dec 2004 10:38:14 +0000; I would doubt very much if a 2kV capacitor is a polarised type. The highest voltage electrolytic I've ever seen was a 8 microfard 800 volt unit. The difficulty lies in getting an adequately thick, ev; /archives//html/Amps/2004-12/msg00223.html (7,651 bytes)
328. RE : [Amps] Tuning (score: 1): Author: peter.chadwick@Zarlink.Com; Date: Wed, 22 Dec 2004 16:33:40 +0100; -3dB, not -6dB. 73 Peter SM/G3RZP _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2004-12/msg00258.html (6,911 bytes)
329. [Amps] HV Supplies and Diodes (score: 1): Author: peter.chadwick@Zarlink.Com; Date: Thu, 3 Jan 2008 23:10:42 +0000; According to the designers I used to work with, who designed diode and thyristor and IGBT stacks for everything up to 5000 volts DC at 2500 Amps, when putting diodes in series. make sure they;re from; /archives//html/Amps/2008-01/msg00047.html (9,097 bytes)
330. Re: [Amps] Transceiver Output Impedance (score: 1): Author: peter.chadwick@Zarlink.Com; Date: Sun, 9 Mar 2008 10:46:44 +0000; This is an interesting question, and there are two schools of thought. One says that you get maximum power when you have a conjugate match, and the other says you get maximum power when feeding an op; /archives//html/Amps/2008-03/msg00090.html (9,775 bytes)
331. Re: [Amps] mounting (UHF) RF powermodules (score: 1): Author: peter.chadwick@Zarlink.Com; Date: Mon, 24 Mar 2008 12:49:24 +0000; be flat enough without machining, ideally with a large diameter 'fly' cutter. You are also looking for a good surface finish with machining ridges barely detectable with a fingernail. As well as flat; /archives//html/Amps/2008-03/msg00235.html (8,468 bytes)
332. Re: [Amps] re 77 MHz to 88 MHz vhf band usage (score: 1): Author: peter.chadwick@Zarlink.Com; Date: Wed, 26 Mar 2008 11:03:50 +0000; customs charges will probably stop Fern from making a big deal on this... sorry for that....< Plus the fact that if they aren't CE marked, it's illegal to sell them in the EEC, unless that model was; /archives//html/Amps/2008-03/msg00272.html (8,706 bytes)
333. Re: [Amps] Silver Strap (score: 1): Author: peter.chadwick@Zarlink.Com; Date: Wed, 9 Jul 2008 08:36:10 +0100; The discolouration on silver plate has led in the past to teh use of a 'flash' of iridium over the top. That doesn't discolour. Other cures for VHF parasitics using strange materials are the same as; /archives//html/Amps/2008-07/msg00079.html (8,815 bytes)
334. Re: [Amps] 1/4" shaft connectors (score: 1): Author: peter.chadwick@Zarlink.Com; Date: Sun, 28 Sep 2008 11:03:05 +0100; If we're talking straight forward couplers (not flexible) , what is a reasonable price for them in:- a) Brass b) Nylon And what threads on the set screws - 6-32, or metric? Some years ago, I made a l; /archives//html/Amps/2008-09/msg00235.html (10,076 bytes)
335. Re: [Amps] Linear Amps (score: 1): Author: peter.chadwick@Zarlink.Com; Date: Tue, 2 Dec 2008 14:21:24 +0000; Eimac aslo published the whole thing as a 20 page application note. That's amateur service newsletter AS53 of 1979, entitled 'design considerations for linear amplifiers'so you might be able to find; /archives//html/Amps/2008-12/msg00034.html (8,367 bytes)

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