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261. [AMPS] Zener screen supplies (score: 1): Author: g8gsq@qsl.net (Steve Thompson); Date: Fri, 13 Apr 2001 09:18:32 +0100; --Original Message-- From: Tom Rauch <w8ji@contesting.com> To: amps@contesting.com <amps@contesting.com>; Steve Thompson <g8gsq@qsl.net> To: <amps@contesting.com> Date: 13 April 2001 01:16 Subject: R; /archives//html/Amps/2001-04/msg00293.html (10,229 bytes)
262. [AMPS] Zener screen supplies (score: 1): Author: g8gsq@qsl.net (Steve Thompson); Date: Fri, 13 Apr 2001 18:49:24 +0100; --Original Message-- From: Tom Rauch <w8ji@contesting.com> To: amps@contesting.com <amps@contesting.com>; Steve Thompson <g8gsq@qsl.net> To: <amps@contesting.com> Date: 13 April 2001 16:09 Subject: R; /archives//html/Amps/2001-04/msg00301.html (9,858 bytes)
263. [AMPS] Zener screen supplies (score: 1): Author: g8gsq@qsl.net (Steve Thompson); Date: Sat, 14 Apr 2001 09:13:44 +0100; --Original Message-- From: measures <2@vc.net> To: Ian White, G3SEK <g3sek@ifwtech.com>; AMPS <amps@contesting.com> To: <amps@contesting.com> Date: 14 April 2001 03:39 Subject: Re: [AMPS] Zener scree; /archives//html/Amps/2001-04/msg00316.html (11,529 bytes)
264. [AMPS] Zener screen supplies (score: 1): Author: g8gsq@qsl.net (Steve Thompson); Date: Sat, 14 Apr 2001 19:40:34 +0100; That seems like a neat idea. KISS too. Steve -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-am; /archives//html/Amps/2001-04/msg00331.html (9,784 bytes)
265. [AMPS] Zener screen supplies (score: 1): Author: g8gsq@qsl.net (Steve Thompson); Date: Tue, 17 Apr 2001 11:39:46 +0100; diodes to wouldn't Yes, I noticed it was rubbish too. I wasn't impressed by the reviewer's lack of criticism either. Steve PS thanks for all inputs on the oddball tube I had - thanks to Ken for ident; /archives//html/Amps/2001-04/msg00384.html (9,542 bytes)
266. [AMPS] Zener screen supplies (score: 1): Author: g8gsq@qsl.net (Steve Thompson); Date: Wed, 18 Apr 2001 08:09:49 +0100; useful The whole thing is rather blown when you see the outtakes of her having fits of giggles. Steve -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative; /archives//html/Amps/2001-04/msg00412.html (9,219 bytes)
267. [AMPS] '250 anode-screen (score: 1): Author: g8gsq@qsl.net (Steve Thompson); Date: Wed, 18 Apr 2001 15:09:05 +0100; For interest, I ran hipot on half a dozen used examples. Leakage started at voltages between 5 and 12kV, but I didn't get any external arcs. Steve -- FAQ on WWW: http://www.contesting.com/FAQ/amps Su; /archives//html/Amps/2001-04/msg00420.html (6,762 bytes)
268. [AMPS] '250 anode-screen (score: 1): Author: g8gsq@qsl.net (Steve Thompson); Date: Wed, 18 Apr 2001 17:40:22 +0100; at Darn - I cleaned them off before storing the valves. Next time, I'll leave them there to see what the effect is. Steve -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contestin; /archives//html/Amps/2001-04/msg00425.html (7,207 bytes)
269. [AMPS] basic question about dipping the plate (score: 1): Author: g8gsq@qsl.net (Steve Thompson); Date: Sun, 22 Apr 2001 18:20:45 +0100; tune work Using the term resonance can be misleading. The pi network is operating as an impedance transform from what the antenna presents to what the plate wants to see. This doesn't rely on resonan; /archives//html/Amps/2001-04/msg00468.html (9,953 bytes)
270. [AMPS] SB-220 Amplifiers and Garage Sales!! (score: 1): Author: g8gsq@qsl.net (Steve Thompson); Date: Tue, 27 Mar 2001 13:06:53 +0100; --Original Message-- From: Peter Chadwick <Peter_Chadwick@mitel.com> To: Jon Ogden <na9d@mindspring.com>; 'measures' <2@vc.net> Cc: amps <amps@contesting.com> To: <amps@contesting.com> Date: 23 March; /archives//html/Amps/2001-03/msg00280.html (9,740 bytes)
271. [AMPS] SB-220 Amplifiers and Garage Sales!! (score: 1): Author: g8gsq@qsl.net (Steve Thompson); Date: Wed, 28 Mar 2001 19:04:20 +0100; from is the If Lp and Rp are the equivalent parallel resistance and inductance of a network, then Ls and Rs are the equivalent series resistance and inductance. At any frequency, you can describe and; /archives//html/Amps/2001-03/msg00286.html (9,391 bytes)
272. Re: [Amps] 2879 biasing (score: 1): Author: "Steve Thompson" <g8gsq@qsl.net>; Date: Sat, 23 Aug 2003 08:18:30 +0100; I have ordered a matched quad of these transistors to put into my mobile amp and need to build a bias supply for them. Reading G3SEK on the subject gave some good pointers. I want to use this behind; /archives//html/Amps/2003-08/msg00020.html (7,741 bytes)
273. Re: [Amps] 4CX350A for VHF? (score: 1): Author: Steve Thompson <g8gsq@qsl.net>; Date: Thu, 28 Aug 2003 16:01:14 -0700; The VHF guys used to prize them very highly, although many have gone to the big Russian triodes these days. A pair will go really well on 2m, but do follow the rule about no grid current. Steve _____; /archives//html/Amps/2003-08/msg00065.html (7,529 bytes)
274. Re: [Amps] PS Theory ? (score: 1): Author: Steve Thompson <g8gsq@qsl.net>; Date: Fri, 29 Aug 2003 15:16:08 -0700; Peak current determines the voltage under load, it's RMS current rather than mean or 'average' that determines the heating effect in the transformer. If I remember correctly, transformer RMS current; /archives//html/Amps/2003-08/msg00075.html (8,386 bytes)
275. Re: [Amps] Microwave Oven Power Supply (score: 1): Author: Steve Thompson <g8gsq@qsl.net>; Date: Wed, 3 Sep 2003 15:21:48 +0000; http://www.vaxxine.com/phil/downloads.htm Steve _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2003-09/msg00029.html (7,420 bytes)
276. Re: [Amps] Tufnol rod (score: 1): Author: Steve Thompson <g8gsq@qsl.net>; Date: Sun, 14 Sep 2003 16:01:52 +0100; Tufnol is a trade mark, don't know whose. Generically it appears to be woven fabric encased in some sort of resin. There appear to be a number of grades, some with defined fabric and epoxy resin, som; /archives//html/Amps/2003-09/msg00122.html (7,759 bytes)
277. Re: [Amps] Input Impedance of GI-7BT Triode (score: 1): Author: Steve Thompson <g8gsq@qsl.net>; Date: Sun, 14 Sep 2003 16:05:12 +0100; A network analyser won't help without some messing, the measurement needs to be done at full drive level. You can feed the amp through a ATU, tune for best match, then put 50 ohms on the transmitter; /archives//html/Amps/2003-09/msg00123.html (9,278 bytes)
278. Re: [Amps] Chimney Construction (score: 1): Author: Steve Thompson <g8gsq@qsl.net>; Date: Mon, 15 Sep 2003 13:47:18 +0100; I've always been dubious of nylon in high rf fields, although I couldn't give examples of why. A variation occured to me but i have never tried it. Wind the chimney as described, then drill some smal; /archives//html/Amps/2003-09/msg00129.html (8,038 bytes)
279. Re: [Amps] Metcal soldering iron and microscopes (score: 1): Author: Steve Thompson <g8gsq@qsl.net>; Date: Tue, 16 Sep 2003 15:24:36 +0100; How to ruin someone's day!!! :-) I bought two of these for work, at full price Seriously, I think they're great except that I've had several bits go intermittent long before they were worn out. I sus; /archives//html/Amps/2003-09/msg00138.html (7,313 bytes)
280. Re: [Amps] Bonding Teflon (score: 1): Author: "Steve Thompson" <g8gsq@qsl.net>; Date: Thu, 18 Sep 2003 07:20:32 +0100; There's a product used in manufacturing PTFE pcbs called 'Tetraetch'. I think it's sodium based - it's also potentially explosive. Steve _______________________________________________ Amps mailing l; /archives//html/Amps/2003-09/msg00168.html (7,211 bytes)

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