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References: [ +from:Peter_Chadwick@mitel.com: 967 ]

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301. [AMPS] Suppressors, measurements, and acrimonious blather (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 7 Aug 2000 13:36:24 +0100; I'd go along with that - at least, for properly rated amplifiers. The last big production amp I did (as opposed to amateur) was continuous rated for SSB/FSK/AM etc at 400 watts output. I used some so; /archives//html/Amps/2000-08/msg00147.html (9,523 bytes)
302. [AMPS] Suppressors, measurements, and acrimonious blather+ (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 8 Aug 2000 08:57:16 +0100; Just to add further facts and cause confusion, I found a box of new (i.e. unused) 150Kohm, 1/4 watt, 5% carbon comps last night, said box being dated 1974. I measured 10 resistors, and the worst one; /archives//html/Amps/2000-08/msg00167.html (8,057 bytes)
303. [AMPS] (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 8 Aug 2000 09:17:46 +0100; I don't have data on the RK65. However, you will not get more than about 350 - 400 watts output in linear service from a pair of 4-125's (which I presume you mean, since I can't find a 3-125), even w; /archives//html/Amps/2000-08/msg00168.html (7,507 bytes)
304. [AMPS] (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 8 Aug 2000 15:33:36 +0100; Because it still won't give more than about 400 watts! 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contest; /archives//html/Amps/2000-08/msg00171.html (7,214 bytes)
305. [AMPS] single tube vs. twins (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Fri, 11 Aug 2000 08:52:31 +0100; I agree with Mauri; the choice is often more a case of what is available. Parallel tubes have a possibility of push - pull mode parasitics, but that is really a minor matter. Sometimes parallel tubes; /archives//html/Amps/2000-08/msg00200.html (7,126 bytes)
306. [AMPS] Relays hanging up (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 14 Aug 2000 10:24:53 +0100; Exactly what I've done on my FT102 to cure the renowned relay problem. The technique was well known in the days of Strowger telephone exchanges. The telephone relays used in the old British Post Offi; /archives//html/Amps/2000-08/msg00282.html (8,394 bytes)
307. [AMPS] FW: Suppressor analysis (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 14 Aug 2000 10:32:03 +0100; To: <amps@contesting.com> -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com; /archives//html/Amps/2000-08/msg00283.html (9,162 bytes)
308. [AMPS] The Art of Collecting Many Large Amplifiers! (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Thu, 6 Jul 2000 09:30:01 +0100; I commented to the XYL the other day that the 24MHz dipole in the tree had got honeysuckle growing on it. Her reply was 'It's obvious you're not running enough power, then'. 73 Peter G3RZP -- FAQ on; /archives//html/Amps/2000-07/msg00030.html (7,556 bytes)
309. [AMPS] The Art of Collecting Many Large Amplifiers! (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Thu, 6 Jul 2000 15:31:19 +0100; Of course, it does help that she has a full licence...she had her callsign when we met at the radio club......she was 16 at the time and I was 29. 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.; /archives//html/Amps/2000-07/msg00034.html (7,630 bytes)
310. [AMPS] Power Supply Question (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Thu, 13 Jul 2000 13:29:55 +0100; Too right!!! You NEVER EVER, under any circumsatnces, want that choke resonant. It must be resonant above the ripple frequency or it looks like a capacitor. Although we talk about 'resonant choke' or; /archives//html/Amps/2000-07/msg00074.html (7,388 bytes)
311. [AMPS] Amp choices for new shack: AL-572, AL-80B, Centurion,QRO HF2000 (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 17 Jul 2000 09:14:38 +0100; Pat, I'd move the tower and beam right up the priority list, well before the amp. 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requ; /archives//html/Amps/2000-07/msg00110.html (6,932 bytes)
312. No subject (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 24 Jul 2000 07:27:30 +0100; Sorry guys, it seems our e-mail system has gone mad and resent a lot of the last two months messages. I suspect that it may be something to do with an impending change to Lotus Notes from Microsoft E; /archives//html/Amps/2000-07/msg00141.html (6,642 bytes)
313. [AMPS] PushPull (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 25 Jul 2000 14:24:24 +0100; Push pull has some advantages at the higher frequencies, in that the tube capacities are effectively in series rather than in parallel. At RF, the theoretical power capabilities are the same; in prac; /archives//html/Amps/2000-07/msg00153.html (7,257 bytes)
314. [AMPS] FCC certification - how do they do it? (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Thu, 27 Jul 2000 08:00:19 +0100; Well said, Tom. There was a wonderful example of this a few years back when a book on monopulse radar was published in the US. According to a guy I know who worked at China Lake at the time, the US N; /archives//html/Amps/2000-07/msg00173.html (9,024 bytes)
315. [AMPS] FCC certification - how do they do it? (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Thu, 27 Jul 2000 08:12:19 +0100; I guess most authorities will figure that the ham with a Bird thruline or similar is 'good enough'. It's only if they really have reason to nail somebody that they'll get nasty. For instance, I'd sus; /archives//html/Amps/2000-07/msg00174.html (9,056 bytes)
316. [AMPS] FCC certification - how do they do it? (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Thu, 27 Jul 2000 11:58:57 +0100; Actually, Maurie, amateur radio manufacturers in Europe can self certify transmitters under the EMC Directive, Article 10. They are the only group who can self certify transmitters, and it is basical; /archives//html/Amps/2000-07/msg00176.html (9,104 bytes)
317. [AMPS] RF power calibration (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Thu, 27 Jul 2000 16:52:37 +0100; One problem I have found with thermocouples is that skin resistance leads to 1 Amp of RF producing more heat than 1 Amp of DC. But it does depend on the thermocouple and how it is made, and how big t; /archives//html/Amps/2000-07/msg00182.html (6,962 bytes)
318. [AMPS] DC Output (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 31 Jul 2000 14:51:29 +0100; But remember the ICAS means that, and modes such as RTTY and SSTV tend not to fit too well into such ratings. Even contesting if you have a lot of speech processing can be a problem; a fan blowing on; /archives//html/Amps/2000-07/msg00224.html (7,398 bytes)
319. [AMPS] Dumb directly heated cathode amp operational questions (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Wed, 7 Jun 2000 08:53:53 +0100; Adding to Rich's comment, fans/blowers using ball race bearings are appreciably noisier than those using straight sleeve bearings, especially, in my experience, when they get old. I gather they have; /archives//html/Amps/2000-06/msg00050.html (9,262 bytes)
320. [AMPS] Dumb directly heated cathode amp operational questions (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Fri, 9 Jun 2000 07:27:18 +0100; OK Rich, I'll buy it. What the heck is a ''surface-wave'' bearing? 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQU; /archives//html/Amps/2000-06/msg00075.html (8,755 bytes)

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