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281. Re: [Amps] 3-500 Pins (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Tue, 17 Apr 2007 08:44:53 +0100; Only because they couldn't find an alternative, however unviable. For sure. The original motivation was to stop lead in gazillions of cheap gadgets going into the waste stream/landfill. That net turn; /archives//html/Amps/2007-04/msg00176.html (7,622 bytes)
282. Re: [Amps] Replacements for Carbon Composition Resisotrs (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Thu, 19 Apr 2007 07:29:56 +0100; Steve _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2007-04/msg00205.html (6,879 bytes)
283. Re: [Amps] Rehabbing that dusty old (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Mon, 23 Apr 2007 07:19:54 +0100; A hipot tester shoud spot a gassy tube - you could ask around locally if anyone has one - or build one. Out of interest, in what way were they too different? Did you get a chance to see if the probl; /archives//html/Amps/2007-04/msg00230.html (8,169 bytes)
284. Re: [Amps] Rehabbing that dusty old (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Mon, 23 Apr 2007 07:26:01 +0100; Manfred mentions his experience being with a Kenwood amp (but not which one). Nichrome might not be a wonder cure, but Henry, Dentron and Measure's suppressors are all more effective than those fitte; /archives//html/Amps/2007-04/msg00231.html (7,165 bytes)
285. Re: [Amps] Rehabbing that dusty old (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Mon, 23 Apr 2007 11:34:55 +0100; I measured them - the results appeared here a while ago. The ratio of effective series resistance at 30MHz to that at 100MHz is lower in the TL922 suppressor than the others (mabye I should have expl; /archives//html/Amps/2007-04/msg00233.html (8,293 bytes)
286. Re: [Amps] Rehabbing that dusty old (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Mon, 23 Apr 2007 14:30:58 +0100; I haven't got round to investigating why they are different. It's on the list of things to do, but that stretches a long way into the distance these days. Visually, the one from TL922 looks nicest -; /archives//html/Amps/2007-04/msg00235.html (8,270 bytes)
287. Re: [Amps] Rehabbing that dusty old (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Tue, 24 Apr 2007 12:14:14 +0100; I don't want to suggest it that strongly - but the suppressor in the TL922 puts noticeably less R in at vhf than others that I measured. As I'm always keen to point out, the suppressor isn't the onl; /archives//html/Amps/2007-04/msg00242.html (8,723 bytes)
288. Re: [Amps] 230v wiring question (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Tue, 24 Apr 2007 20:46:49 +0100; conductors and a Ahhh - twin and earth. Finally I understand! We all use the same stuff (but without the dual voltage confusion). Steve _______________________________________________ Amps mailing li; /archives//html/Amps/2007-04/msg00263.html (8,567 bytes)
289. Re: [Amps] Smith Chart program (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Thu, 26 Apr 2007 07:59:48 +0100; I use Motorola MIMP (which can still be found as freeware at www.pcb-pool.com). If you take the trouble to learn the keystroke commands rather than mouse clicks it's very quick to drive. It doesn't d; /archives//html/Amps/2007-04/msg00311.html (6,862 bytes)
290. Re: [Amps] Bird wattmeter (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Mon, 07 May 2007 11:46:02 +0100; I think the 1350 ohms Peter measured is the movement itself - the spec. is 1400 ohms, 30uA. I don't think there's any extra resistors in there. I forget who started the thread, but how far off fsd is; /archives//html/Amps/2007-05/msg00052.html (7,329 bytes)
291. Re: [Amps] Bird wattmeter (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Mon, 07 May 2007 19:01:39 +0100; If I remember correctly, it's +/-5% of fsd at any reading - so a reading at 50% fsd has an error of +/-10% and so on. As you say, immaterial in the context of radio links, maybe not always immaterial; /archives//html/Amps/2007-05/msg00060.html (8,223 bytes)
292. Re: [Amps] Bird wattmeter (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Tue, 08 May 2007 08:36:30 +0100; Things can become gold standards because they are truly good, or because of weight of numbers, folklore and peer pressure. Bird 43 etc are good at what they do - inline measurement, wide frequency ra; /archives//html/Amps/2007-05/msg00073.html (8,653 bytes)
293. Re: [Amps] An inexpensive choke for a resonant filter (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Wed, 16 May 2007 17:31:40 +0100; I have three here I'm experimenting with (as HV supplies). I lifted the grounded end of the secondary on all of them - two hipot to 8kV+, the third arcs at 3kV but a piece of Kapton tape on the frame; /archives//html/Amps/2007-05/msg00142.html (8,846 bytes)
294. [Amps] Self tapping screws (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Tue, 22 May 2007 09:39:32 +0100; A while ago someone asked about hole sizes for self tappers. I've finally got round to scanning the data I have and you can find it at: www.eltac.co.uk/g8gsq/selftapper3.jpg www.eltac.co.uk/g8gsq/sel; /archives//html/Amps/2007-05/msg00161.html (6,300 bytes)
295. Re: [Amps] attaching a heat spreader to a heat sink (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Tue, 22 May 2007 15:10:30 +0100; There is no substitute for getting both pieces machined flat and finished with a low roughness surface. If they don't 'suck' like slip guages when you use a very thin film of heatsink compound, they'; /archives//html/Amps/2007-05/msg00167.html (7,835 bytes)
296. Re: [Amps] attaching a heat spreader to a heat sink (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Tue, 22 May 2007 22:22:29 +0100; Round here I'd expect to get it done for about the price of 1 MRF150. My view is that's a good investment. Works well - the purist cabinet makers who want precision surfaces on planes and chisels swe; /archives//html/Amps/2007-05/msg00178.html (8,428 bytes)
297. Re: [Amps] attaching a heat spreader to a heat sink (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Thu, 24 May 2007 10:48:33 +0100; I like the idea of trying as planer - although I shudder to think what my wife would do to me if I sent metal through her big thicknesser :-) Given the thickness of metal, I doubt there will be much; /archives//html/Amps/2007-05/msg00188.html (9,323 bytes)
298. Re: [Amps] attaching a heat spreader to a heat sink (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Thu, 24 May 2007 10:49:57 +0100; Can you remember the frequency where the problem occurs? Thanks, Steve _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listin; /archives//html/Amps/2007-05/msg00189.html (8,511 bytes)
299. Re: [Amps] attaching a heat spreader to a heat sink (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Thu, 24 May 2007 16:22:38 +0100; There's always water cooling - solder some tubes onto the underside of the heat spreader (before you do the final flattening). No need for fancy pure water. I've always wanted to try soldering a larg; /archives//html/Amps/2007-05/msg00198.html (8,850 bytes)
300. Re: [Amps] FW: attaching a heat spreader to a heat sink (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Fri, 25 May 2007 07:14:38 +0100; Helps keep you going on those long contest sessions. My thoughts were moving towards adding a condenser system and turning it into a small still. Steve _______________________________________________; /archives//html/Amps/2007-05/msg00205.html (6,904 bytes)

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