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181. R: R: [AMPS] 8877 bias (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Mon, 20 Dec 1999 07:49:36 +0100; .....but once found the right voltage, value stays there and doesn't swing like in a string of 10 diodes. Merry Christmas & HNY 73, Mauri I4JMY --Messaggio Originale-- Da: measures <measures@vcnet.co; /archives//html/Amps/1999-12/msg00262.html (8,612 bytes)
182. R: [AMPS] DAF-page updated... (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Fri, 31 Dec 1999 19:21:34 +0100; Independently by the "max hold", the triangular shapes are a strange result on the frequency domain for a complex modulating signal in a transmitter and when that signal is applied to an amplifier. C; /archives//html/Amps/1999-12/msg00428.html (8,494 bytes)
183. R: SV: [AMPS] Re: SB220 problem (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Wed, 10 Nov 1999 23:15:25 +0100; For your info, that switch is effectively mall but not so much as it might be thought. Since 1988, what it was my SB220 has a 3CX1200 replacing the paired 3-500, a forced cooling system with chimney; /archives//html/Amps/1999-11/msg00267.html (8,967 bytes)
184. R: R: SV: [AMPS] Re: SB220 problem (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Thu, 11 Nov 1999 12:37:17 +0100; --Messaggio Originale-- Da: measures <measures@vcnet.com> A: AMPS <amps@contesting.com> Data invio: giovedì 11 novembre 1999 6.25 Oggetto: Re: R: SV: [AMPS] Re: SB220 problem The calculation d; /archives//html/Amps/1999-11/msg00279.html (7,681 bytes)
185. [AMPS] Power Modules (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Sun, 28 Nov 1999 23:05:04 +0100; I heard rumors about availability of 17dB gain, 1 Kw, 1.3 - 40 MHz linear amplifier modules. If rumors are real, the modules should be interesting because using hi-voltage power mosfets the supply vo; /archives//html/Amps/1999-11/msg00535.html (7,035 bytes)
186. R: [AMPS] Conjugate matching and amplifiers (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Fri, 1 Oct 1999 16:26:07 +0200; I don't really agree with this statement at high power levels. An high level amplifier is not designed ONLY at a stated output power, but it's designed to be at the highest gain possible and for the; /archives//html/Amps/1999-10/msg00011.html (11,233 bytes)
187. R: R: [AMPS] Conjugate matching and amplifiers (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Fri, 1 Oct 1999 19:40:05 +0200; The expression "best possible" and specifically the word "possible" included, in my thoughts but not in the words, the right margin to keep source, load and grid impedances away from values that migh; /archives//html/Amps/1999-10/msg00019.html (8,778 bytes)
188. R: R: [AMPS] Conjugate matching and amplifiers (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Sat, 2 Oct 1999 00:39:28 +0200; The minimum noise figure of an amplifier is found (working with the input match and not the with the output), seaching for the source resistance and varying the bias of the amplifying device until th; /archives//html/Amps/1999-10/msg00031.html (10,518 bytes)
189. R: [AMPS] Re: swr (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Sat, 2 Oct 1999 01:23:40 +0200; This is an opinable statement. If the the center is 1 Ohm, then all the plotted values in the chart have to be normalized to it. When values are normalized, any value can a become a normalized 1 Ohm; /archives//html/Amps/1999-10/msg00034.html (9,810 bytes)
190. R: [AMPS] Conjugate Matching (again) (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Sun, 3 Oct 1999 19:40:42 +0200; E=MC^ 73, Mauri I4JMY --Messaggio Originale-- Da: Roger D. Johnson <n1rj@pivot.net> A: Amplifier Reflector <amps@contesting.com> Data invio: sabato 2 ottobre 1999 18.43 Oggetto: [AMPS] Conjugate Matc; /archives//html/Amps/1999-10/msg00066.html (8,815 bytes)
191. R: [AMPS] SWR and line length, etc. (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Mon, 4 Oct 1999 15:41:28 +0200; Can I try answer ? Resonance occurs when the reactive part of the impedance is 0. The VSWR is instead produced by any mismatch of real or/and imaginary part of the playing impedances. 73, Mauri I4JMY; /archives//html/Amps/1999-10/msg00099.html (10,143 bytes)
192. [AMPS] SWR, impedance, reactance, load.... (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Tue, 5 Oct 1999 17:38:35 +0200; It was easy to predict the SWR/impedance discussion did wrap on itself with marginal progress on the didactical aspect but it was very interesting anyway. Now, in order to resume, can I make some pra; /archives//html/Amps/1999-10/msg00193.html (8,509 bytes)
193. R: [AMPS] tube plate resistance (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Wed, 6 Oct 1999 10:36:35 +0200; Then, the overall efficiency of your class A amplifier is close to that of a standard class C amplifier. 73, Mauri I4JMY --Messaggio Originale-- Da: John T. M. Lyles <jtml@lanl.gov> A: <amps@contesti; /archives//html/Amps/1999-10/msg00220.html (8,334 bytes)
194. R: [AMPS] Ground rods? (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Fri, 8 Oct 1999 22:48:38 +0200; About the last question.... quite marginally if the antenna generates a field that's horizontally polarized. 73, Mauri --Messaggio Originale-- Da: measures <measures@vcnet.com> A: AMPS <amps@contesti; /archives//html/Amps/1999-10/msg00313.html (9,657 bytes)
195. R: [AMPS] More Relevant SWR FINAL EXAM (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Mon, 11 Oct 1999 19:20:44 +0200; If I remember correctly, "something" magnetical like (a circulator) used on microwaves. 73, Mauri I4JMY --Messaggio Originale-- Da: measures <measures@vcnet.com> A: Jerry K9GD <jerry@k9gd.com>; AMPS; /archives//html/Amps/1999-10/msg00374.html (9,724 bytes)
196. R: [AMPS] Isolator - Uncle ! (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Tue, 12 Oct 1999 22:56:38 +0200; True, I remember there was a circulator on the telemetry receiver of a communications satellite I tested in the mid 80' before the integration. The purpose was that of keeping the noise figure and a; /archives//html/Amps/1999-10/msg00414.html (7,717 bytes)
197. R: [AMPS] More Relevant SWR FINAL EXAM (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Tue, 12 Oct 1999 23:09:23 +0200; Isolators are not only used on transmitters but do have (or at least had) other applications. Moreover, in low signal applications they aren't so big. I remember one, usable in the 200 MHz range, hav; /archives//html/Amps/1999-10/msg00415.html (10,182 bytes)
198. R: [AMPS] You gotta read this.... (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Thu, 14 Oct 1999 16:16:47 +0200; I don't know if laughing more to the claimed amplifier structure and performances or to who believes it. (repost this message next april 1st) 73, Mauri I4JMY --Messaggio Originale-- Da: Phil Levin W2; /archives//html/Amps/1999-10/msg00446.html (11,710 bytes)
199. R: [AMPS] You gotta read this.... (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Thu, 14 Oct 1999 19:57:38 +0200; Phil, 4CX15000 is a tetrode whose single tone power output is theorically 36 Kw, as per Eimac data sheet., but the obtainable power by such kind of tubes is generally much less when talking about con; /archives//html/Amps/1999-10/msg00457.html (15,688 bytes)
200. R: R: [AMPS] You gotta read this.... (score: 1): Author: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara); Date: Fri, 15 Oct 1999 00:30:30 +0200; (see below) --Messaggio Originale-- Da: Jeff Wolf <da_kang@hotmail.com> A: <i4jmy@iol.it> Cc: <amps@contesting.com> Data invio: giovedì 14 ottobre 1999 21.04 Oggetto: Re: R: [AMPS] You gotta r; /archives//html/Amps/1999-10/msg00475.html (12,966 bytes)

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