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221. [AMPS] Splatter and ALC (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 9 Jun 1997 10:16:52 +0000; That's right -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com Search: ht; /archives//html/Amps/1997-06/msg00133.html (8,302 bytes)
222. [AMPS] Splatter (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 9 Jun 1997 10:16:53 +0000; You idea does not wash at all Rich. IMD is caused by plate current saturation, as well as non-linearity in the grid. Of these two effects, plate current saturation by far dominates the IMD. We know; /archives//html/Amps/1997-06/msg00134.html (9,905 bytes)
223. [AMPS] Splatter (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 9 Jun 1997 13:13:19 +0000; Hi Ian, I see why you said that, looking at the 4CX250. I just didn't want people to assume grid dissipation is given by multiplying grid current times dc grid bias. Clearly, that is NOT the case. Th; /archives//html/Amps/1997-06/msg00139.html (11,987 bytes)
224. [AMPS] Splatter (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 9 Jun 1997 17:03:32 +0000; Hi Ian, It's easy to spot someone who has measured or really understands the cause of a problem. <snip> Anyone who has ever watched IMD products on a spectrum analyzer would appreciate your words Ian; /archives//html/Amps/1997-06/msg00141.html (9,938 bytes)
225. [AMPS] PA Recommendation Wanted (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 9 Jun 1997 17:03:32 +0000; Ahh. The same bent logic applied to neutralization rears its head again in a new topic. "If they DON'T mention something, it must NOT be true." Eimac only says to NEVER allow the grid resistance to; /archives//html/Amps/1997-06/msg00142.html (9,471 bytes)
226. [AMPS] amplifier "audio" (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Tue, 10 Jun 1997 10:55:54 +0000; The problem with AM BCB comparison is one of bandwidth as a percentage of frequency and accumulated Q in the system. A 20 KHz wide (with 10 KHz upper modulation frequency) or wider signal is a large; /archives//html/Amps/1997-06/msg00152.html (8,425 bytes)
227. [AMPS] splatter (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Tue, 10 Jun 1997 10:55:54 +0000; Hi Peter, Only a fool would argue with that! Yet many people suggest using NO grid regulation. Absolutely, and you also have to be sure the time constants of each supply are the identical if they are; /archives//html/Amps/1997-06/msg00153.html (11,395 bytes)
228. [AMPS] splatter (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Tue, 10 Jun 1997 18:44:50 +0000; Rich, Are you saying a high series resistance in the grid supply reduces the potential of creating unwanted IMD? Do you think grid current causes IMD? 73, Tom W8JI -- FAQ on WWW: http://www.contestin; /archives//html/Amps/1997-06/msg00167.html (8,946 bytes)
229. [AMPS] splatter (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Tue, 10 Jun 1997 21:27:58 +0000; You ask if anyone has ever seen AB1 triode PA's. Yes, I have seen dozens of them. There is no law of circuit behavior that prevents operating a triode in AB1. Look at the curves all you like, and it; /archives//html/Amps/1997-06/msg00170.html (11,890 bytes)
230. [AMPS] IMD (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Wed, 11 Jun 1997 01:24:29 +0000; I think this thing has gone far afield of helping anyone build a clean PA. It seems Ian, Peter and I agree on the causes of IMD, and some good ideas to prevent IMD (regulating the screen and grid wit; /archives//html/Amps/1997-06/msg00173.html (9,252 bytes)
231. [AMPS] Re: three tone test (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Wed, 11 Jun 1997 15:20:41 +0000; Five people asked about three tone tests. I want to post this here because it's quicker and someone else might have a suggestion or two to improve the test, since it is my own system. The problem is; /archives//html/Amps/1997-06/msg00186.html (8,776 bytes)
232. [AMPS] AB1 vs AB2 (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Wed, 11 Jun 1997 15:20:41 +0000; You could measure it by doing a load pull. Change the load and measure the voltage change, that would give you an equiv ESR. Series regulators generally are more complex and difficult to build, but; /archives//html/Amps/1997-06/msg00187.html (10,220 bytes)
233. [AMPS] AB1 vs AB2 (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Thu, 12 Jun 1997 07:19:34 +0000; To: <amps@contesting.com> Zeners are OK for class C PA's, but I'd consider some sort of active amplifier working against a stable reference driving a shunt regulator. By then way, most zeners cross; /archives//html/Amps/1997-06/msg00197.html (8,190 bytes)
234. [AMPS] AB1 vs AB2 (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Thu, 12 Jun 1997 07:19:33 +0000; It's doubtful that problem would occur in the control grid circuit. Perhaps your mind is still stuck on tubes with big handles, and not on the tubes Paul asked about. One design solution to 'seconda; /archives//html/Amps/1997-06/msg00198.html (8,290 bytes)
235. [AMPS] splatter etc (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Thu, 12 Jun 1997 15:02:14 +0000; To: <amps@contesting.com> Questions like that often just turn out to be "busy work" Peter. When we have no idea what was in the mind of the people putting the sheets together, we can only guess. Ano; /archives//html/Amps/1997-06/msg00203.html (11,823 bytes)
236. [AMPS] splatter etc (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Fri, 13 Jun 1997 11:52:11 +0000; My mistake, I should have said pentodes. Higher Mu tubes generally have more stable Rp values. Rp in this case is the slope of the anode to cathode resistance as voltage drop across the tube is vari; /archives//html/Amps/1997-06/msg00210.html (10,317 bytes)
237. [AMPS] Yaesu price for 50V PS (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Sat, 14 Jun 1997 07:38:04 +0000; Hi Dave, Rumors rumors rumors! Someone has been telling you stories! The ALS-600 uses an old fashioned choke input supply with a swinging choke. Luke or Lucas or whatever has nothing to do with it. T; /archives//html/Amps/1997-06/msg00215.html (10,268 bytes)
238. [AMPS] two tone test (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Sat, 14 Jun 1997 07:38:03 +0000; Someone asked what a two tone test was, did anyone answer the fellow? 73, Tom W8JI -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-; /archives//html/Amps/1997-06/msg00216.html (7,436 bytes)
239. [AMPS] Re: regulator mu (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Sat, 14 Jun 1997 09:42:17 +0000; To: <amps@contesting.com> You seem to be (as you commonly do) saying because you haven't seen something it must not work. For example, look at the 3CW5000 tube family. The low mu F1 type is listed a; /archives//html/Amps/1997-06/msg00217.html (10,120 bytes)
240. [AMPS] splatter (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Sat, 14 Jun 1997 22:43:58 +0000; Rich, I think you just like to argue about nothing. That's why I ignored you. One boring argument at a time is more than enough. Then please tell us all where we can read that Rich. Maybe my books ar; /archives//html/Amps/1997-06/msg00221.html (9,858 bytes)

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