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References: [ +from:Ian: 2099 ] [ White: 4243 ]

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361. [AMPS] s meter calibration (score: 147): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Tue, 13 Jun 2000 07:45:55 +0100; 50uV/6dB is an IARU recommendation, but it has little effect in real life. The idea of a single input level for S9 came long before modern transceivers, where there is a choice of 2, 3 or even 4 diff; /archives//html/Amps/2000-06/msg00144.html (9,635 bytes)
362. [AMPS] s meter calibration (score: 147): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Tue, 13 Jun 2000 20:16:53 +0100; line in That is the kind of thing I meant by: Also it should be possible to compensate for gain variations due to switching in various preamps or attenuators, so that the S-meter indicates the signal; /archives//html/Amps/2000-06/msg00156.html (10,244 bytes)
363. [AMPS] How To Design HV Glitch Protection Circuits (score: 147): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Wed, 14 Jun 2000 07:54:15 +0100; What Bob describes can easily happen with 4CX250/350 sockets, if you don't take the trouble to protect them. Eimac's advice about a series resistor in the anode supply is good, but their advice about; /archives//html/Amps/2000-06/msg00172.html (10,871 bytes)
364. [AMPS] 3cx1000a7 bias (score: 147): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Sun, 18 Jun 2000 23:23:42 +0100; This question keeps coming around, and whenever Rich mentions the string of diodes, it's also the cue for me... There's a circuit on my site that is continuously adjustable and gives true constant-vo; /archives//html/Amps/2000-06/msg00250.html (7,856 bytes)
365. [AMPS] 3cx1000a7 bias (score: 147): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Mon, 19 Jun 2000 20:17:02 +0100; The URL above goes directly to the part of one particular page that is relevant to the present discussion. That page is in fact the last of three, giving background technical material and partial sch; /archives//html/Amps/2000-06/msg00259.html (8,421 bytes)
366. [AMPS] G3SEK Triode Board (score: 147): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Sun, 25 Jun 2000 22:33:59 +0100; I have e-mailed Jim directly with Digi-Key part numbers and substitution suggestions, but would also appreciate feedback from anyone else on US sources for: RFP08P05 - Harris-Intersil, P-channel MOSF; /archives//html/Amps/2000-06/msg00387.html (7,708 bytes)
367. [AMPS] Practical PI Nets (score: 147): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Mon, 1 May 2000 16:46:15 +0100; You can get a reading by connecting a low-level impedance meter to the input side of a "hot" amp (all operating voltages applied) but it won't necessarily represent the impedance at full drive. You c; /archives//html/Amps/2000-05/msg00010.html (9,113 bytes)
368. [AMPS] KD9JQ GG triode program - data for Russian tubes? (score: 147): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Mon, 1 May 2000 16:44:35 +0100; Has anyone made data files for Russian tubes such as the GS35b, to use with the KD9JQ GG triode program? 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist for RadCom (RSGB) http; /archives//html/Amps/2000-05/msg00011.html (7,079 bytes)
369. [AMPS] High Voltage Connectors? (score: 147): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Wed, 19 Apr 2000 11:15:17 +0100; The problem with the Millen connectors is that they allow an idiot like me to connect only the B+, without also connecting ground and B-minus. It has great potential to outlast its owner! This topic; /archives//html/Amps/2000-04/msg00108.html (8,853 bytes)
370. SV: [AMPS] Inrush Current (score: 147): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Wed, 26 Apr 2000 18:18:12 +0100; An external B+ to ground short in a GG amplifier - the classic case being powering-up with the B+ crowbar switch closed - will not send any current through the cathode at all. The current flows back; /archives//html/Amps/2000-04/msg00157.html (10,342 bytes)
371. SV: [AMPS] Inrush Current (score: 147): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Wed, 26 Apr 2000 22:38:33 +0100; Good point - I should have said, "powering-up and then closing the B+ crowbar switch." - moderated by a surge limiting ("glitch") resistor, all of which is totally within our control. Yes, there are; /archives//html/Amps/2000-04/msg00161.html (9,783 bytes)
372. SV: [AMPS] Inrush Current (score: 147): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Thu, 27 Apr 2000 07:46:24 +0100; Depends what you mean by "penetrating". It doesn't have to blow a physical hole in the grid. What could be happening is that the very local area of the grid where the arc strikes is pulled strongly p; /archives//html/Amps/2000-04/msg00167.html (9,166 bytes)
373. Re: [Amps] 4CX250 MSDS SHEET (score: 92): Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>; Date: Wed, 12 Dec 2007 13:19:44 +0000; Yes, that all fits together - the 4CX250B"M-for-Marconi". Mike, you probably have all the evidence you need to tear up the beryllium emergency procedure. If the Navy wants more, then call Eimac. 73 f; /archives//html/Amps/2007-12/msg00142.html (14,682 bytes)
374. [AMPS] Watt meters and PEP (score: 88): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Thu, 13 Jan 2000 08:20:00 +0000; That's right. I'm not familiar with the way that instrument actually measures RF power, but it seems likely that it is *calibrated* using CW and a standard wattmeter. The statement about "peak voltag; /archives//html/Amps/2000-01/msg00249.html (14,461 bytes)
375. [AMPS] BeO Cautions (score: 88): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 21 Dec 1999 09:24:09 +0000; That isn't what I said at all! I said that the pink colour has NO CONNECTION with any beryllia content, so the colour is totally useless as an indication. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Bo; /archives//html/Amps/1999-12/msg00318.html (9,595 bytes)
376. Re: [Amps] Outgassing tubes. (score: 88): Author: Ian White G/GM3SEK <gm3sek@ifwtech.co.uk>; Date: Mon, 3 Oct 2005 07:30:39 +0100; While the barium metal getter is being deposited onto the glass (after the tube has been sealed), some of the remaining gas molecules are buried under the metal. In addition the process leaves a chem; /archives//html/Amps/2005-10/msg00082.html (10,100 bytes)
377. Re: [Amps] 4CX250 MSDS SHEET (score: 88): Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>; Date: Wed, 12 Dec 2007 10:51:29 +0000; "Pink BeO ceramic" is an urban legend. From http://www.svetlana.com/docs/tubeFAQ.html [CAPITALS added for emphasis]: "Q. Why is your ceramic pink? A. Svetlana ceramic power tubes are manufactured wit; /archives//html/Amps/2007-12/msg00139.html (11,108 bytes)
378. Re: [Amps] GS35B Gassy, or Arcing? (score: 88): Author: "Ian White" <gm3sek@ifwtech.co.uk>; Date: Wed, 25 Feb 2015 17:04:40 -0500; Do you know exactly where it is, Mike - for example, in relation to any of these photographs? http://gs35b.com/gs35b/bang.html voltages a there. But you also need to be careful about what kind of ad; /archives//html/Amps/2015-02/msg00146.html (10,379 bytes)
379. [AMPS] BeO Cautions (score: 83): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Mon, 20 Dec 1999 17:22:23 +0000; No, but it doesn't have to be pink either. All I'm saying is that it's not correct to assume that any ceramic contains beryllia just because it's pink. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book'; /archives//html/Amps/1999-12/msg00286.html (9,286 bytes)
380. [AMPS] Another arc question (score: 83): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sun, 10 May 1998 19:42:16 +0100; Because the coil has finite Q. If you take any measured Lp value from the table, convert to reactance at the measurement frequency, and multiply by the measured Q, there's the Rp value. The additiona; /archives//html/Amps/1998-05/msg00146.html (12,793 bytes)

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