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201. R: R: [AMPS] You gotta read this.... (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Fri, 15 Oct 1999 00:33:24 +0200; Pete, the argument is already closed for me. I did astray, but if I'm not in error, in the first posting about this topic there was no sign those amp were not built for communications. 73, Mauri I4JM; /archives//html/Amps/1999-10/msg00476.html (9,105 bytes)
202. R: [AMPS] QBL 5-3500 - How to feed it ? (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Tue, 19 Oct 1999 09:02:59 +0200; This is a multi-part message in MIME format. --=_NextPart_000_0167_01BF1A10.BDB7C700 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable What's the question, ho; /archives//html/Amps/1999-10/msg00540.html (13,806 bytes)
203. R: [AMPS] TS940S CONNECTION TO HEATHKIT SB200 LINEAR (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Wed, 20 Oct 1999 23:04:23 +0200; I'm still switching the SB220 with the original TS930 NPN transistor since 1982 and I never had problems. I remember before doing it I checked the transistor data sheet and it come out it has enough; /archives//html/Amps/1999-10/msg00574.html (9,477 bytes)
204. [AMPS] Unknown remote switch (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Sun, 5 Sep 1999 19:06:59 +0200; I bought a remote rotary coxial switch made by Spinner. Who sold it to me told the switch is rated CW (continuous carrier) 1.5 KW @ 1500 Mhz and mainly used to switch antennas or UHF TV transmitters.; /archives//html/Amps/1999-09/msg00022.html (7,526 bytes)
205. R: [AMPS] Have Cake & Eat it too (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Thu, 9 Sep 1999 20:23:42 +0200; Nothing strange, any voltage power meter reads a voltage on the line and indicates the correlated power at a stated impedance. In case the load is not purely resistive or higher than the nominal impe; /archives//html/Amps/1999-09/msg00051.html (11,296 bytes)
206. [AMPS] 8877 grid fears (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Mon, 13 Sep 1999 14:15:12 +0200; I don' want to enter deep, but I've seen a number of 8877 working along their life with much bigger grid currents than 50/60ma (2-3 times more). Those tubes were only replaced after the scheduled "on; /archives//html/Amps/1999-09/msg00100.html (7,547 bytes)
207. R: [AMPS] Silver Plating question (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Mon, 20 Sep 1999 16:23:04 +0200; I've more than some doubt if available copper is really a better conductor than silver plating. Under my eyes, a big power commercial VHF/FM amplifier prototype was on test and the tuned line, a bare; /archives//html/Amps/1999-09/msg00181.html (13,448 bytes)
208. R: [AMPS] Where to read Reflected Power (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Tue, 28 Sep 1999 10:28:29 +0200; Jim, the answer is already in your post. If a load is not purely resistive and same value than source and load, the line act as an impedance transformer and moving along the line an SWR meter the rea; /archives//html/Amps/1999-09/msg00270.html (10,962 bytes)
209. R: [AMPS] Re: swr (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Tue, 28 Sep 1999 23:07:31 +0200; Not considering losses, there are only 2 conditions were no changes in impedance occurs between antenna and transmitter : 1 ) Source, line and load have the same impedance 2 ) The line is half wavele; /archives//html/Amps/1999-09/msg00298.html (12,425 bytes)
210. R: [AMPS] Re: swr (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Wed, 29 Sep 1999 14:58:02 +0200; John, concerning the point "a", source line and load, I was not talking of SWR changes but of impedance changes between antenna and transmitter, moreover as a direction and not as a versus. The best; /archives//html/Amps/1999-09/msg00312.html (9,963 bytes)
211. R: [AMPS] Amplifier for cw only-question. (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Wed, 29 Sep 1999 19:42:33 +0200; --Messaggio Originale-- Da: Chip Owens <owens@atd.ucar.edu> A: <amps@contesting.com> Data invio: martedì 28 settembre 1999 21.41 Oggetto: [AMPS] Amplifier for cw only-question. Yes, the effici; /archives//html/Amps/1999-09/msg00318.html (8,664 bytes)
212. R: [AMPS] Reading Reflected and True (?) Power (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Thu, 30 Sep 1999 10:38:19 +0200; The generated power is the drawn energy multiplied by the amplifier efficiency factor, the delivered power is instead the energy effectively transfered to the load. In a mismatched condition, expecia; /archives//html/Amps/1999-09/msg00341.html (11,318 bytes)
213. R: [AMPS] L-Pi net...downside? (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Sun, 1 Aug 1999 23:40:16 +0200; Vic, with some care and a bit of experience in correct positioning and wiring, the problem to find or realize proper components to have and keep a standard PI network whose loaded Q is 10 is a fake o; /archives//html/Amps/1999-08/msg00008.html (10,043 bytes)
214. R: R: [AMPS] L-Pi net...downside? (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Tue, 3 Aug 1999 16:54:22 +0200; I'm very sorry but I don't undestand what's the relation between Ian's mail and my previous mail attached at the bottom. Wasn't my mail clear enough ? Component Q is one story and used PI network Q t; /archives//html/Amps/1999-08/msg00076.html (13,197 bytes)
215. R: R: [AMPS] L-Pi net...downside? (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Thu, 5 Aug 1999 16:43:20 +0200; Is it reasonable to spend days in debating about the resonance of a PI network ? I don't think so ! 73, Mauri I4JMY -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.c; /archives//html/Amps/1999-08/msg00108.html (9,336 bytes)
216. R: R: [AMPS] L-Pi net...downside? (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Thu, 5 Aug 1999 19:57:24 +0200; Peter, it happens that finding out where the resonance occurs in a PI network is a didactical exercise with a very small practical application and could just confuse who's not a professional in the p; /archives//html/Amps/1999-08/msg00115.html (10,975 bytes)
217. R: R: [AMPS] L-Pi net...downside? (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Fri, 6 Aug 1999 23:26:47 +0200; Peter, finally, let us know how the resonance of a PI network, that's not a bandpass device, enters in the design of an Amplifier PI and, in the case you've the answer, how people can get in trouble; /archives//html/Amps/1999-08/msg00141.html (9,895 bytes)
218. R: [AMPS] Load C as last resort safety (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Wed, 11 Aug 1999 20:17:17 +0200; No engeneer, unless insane, would sign the project of an amplifier without a properly dimensioned coil paralleled to PI output and without conventional fuses or breakers in the PS. Anyway, not all of; /archives//html/Amps/1999-08/msg00213.html (10,188 bytes)
219. R: [AMPS] Pi-Net math (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Fri, 13 Aug 1999 22:25:49 +0200; Bob's statement is perfectly correct because he doesn't suggest to add an extraneous circuit but simply redrawed the PI circuit in another form (the most didactical one in my opinion). A PI network c; /archives//html/Amps/1999-08/msg00252.html (9,457 bytes)
220. R: [AMPS] Upside down SB-220 (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Thu, 26 Aug 1999 16:24:41 +0200; I did operate my SB220 upside down many times with no problems but what's valid for an SB220 couldn't be true for other amps using the same 3-500z but different cooling systems. If it's true that mos; /archives//html/Amps/1999-08/msg00317.html (8,118 bytes)

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