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References: [ +from:G3SEK@ifwtech.demon.co.uk: 419 ]

Total 419 documents matching your query.

221. [AMPS] Screen regulator circuit needed (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 17 Nov 1998 22:20:17 +0000; [snip - agreed, or near enough] Yes, again we agree. But also unfortunately an inadequate regulator, from the viewpoint of obtaining the best possible IMD and protection for the tube (as demonstrated; /archives//html/Amps/1998-11/msg00247.html (11,006 bytes)
222. [AMPS] Screen regulator circuit needed (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Thu, 19 Nov 1998 09:49:01 +0000; ... For the record, the URL is: http://www.ifwtech.demon.co.uk/g3sek/cleansig/imd1.htm Most of the details you're asking John for are there, Rich. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In; /archives//html/Amps/1998-11/msg00274.html (9,292 bytes)
223. [AMPS] re: beryllium in tubes (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Mon, 5 Oct 1998 11:59:15 +0100; X-ray emission depends on the anode voltage (determines photon energy) and anode current (determines intensity). The original question has timed-out here, but ISTR it was about 4CX250s. At the typica; /archives//html/Amps/1998-10/msg00017.html (7,979 bytes)
224. [AMPS] Meter Shunt Calculation (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 6 Oct 1998 14:03:24 +0100; That's very good advice. Using BOTH SHUNT AND SERIES resistors can give much better protection to the meter. The shunt resistor is in the main current flow, not across the meter. The series resistor; /archives//html/Amps/1998-10/msg00043.html (10,200 bytes)
225. [AMPS] Hybrid Combiner Questions (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Thu, 8 Oct 1998 13:58:53 +0100; Of course it is - he's One Of Us (K0DAS). 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.demon.co.uk/g3sek -- FAQ on WWW: http://www.cont; /archives//html/Amps/1998-10/msg00062.html (8,024 bytes)
226. [AMPS] Meter Scale (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sun, 11 Oct 1998 09:44:03 +0100; Products that are intended for document illustration don't hack it in this application. Sure, you can use them to draw kind of scale, but it will look very home-made. What you need is a mechanical dr; /archives//html/Amps/1998-10/msg00106.html (10,560 bytes)
227. [AMPS] Capacitor voltage rating? (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Mon, 12 Oct 1998 11:28:36 +0100; True, but the filter sections are impedance-transforming L networks so the impedances inside the filter can be several times higher than 50R. Yes, much better! Silvered micas also have the current-ca; /archives//html/Amps/1998-10/msg00113.html (8,705 bytes)
228. [AMPS] Meter Scale (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 13 Oct 1998 22:43:05 +0100; It's probably bad form to reply twice to the same message, but I just found something else on the hard disk that might be of use. This QuickBasic program by G7UFV is intended to draw meter scales on; /archives//html/Amps/1998-10/msg00160.html (13,020 bytes)
229. [AMPS] L4B (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 14 Oct 1998 22:53:39 +0100; Hey, that's fighting talk! One problem with these circuits is that many of them require an extra floating power supply. I've recently been playing with a circuit using a TL431 variable shunt regulato; /archives//html/Amps/1998-10/msg00185.html (10,302 bytes)
230. [AMPS] L4B (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Thu, 15 Oct 1998 21:58:25 +0100; "What price" comes into this very literally. In Europe the classic 8.2V 50W zeners are very hard to find. From the big catalogs, the choices are between a 20W diode at $10 (but probably under-rated i; /archives//html/Amps/1998-10/msg00200.html (9,345 bytes)
231. [AMPS] Looking for parts.. (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sat, 17 Oct 1998 16:27:17 +0100; Hydrogen fluoride, actually - but almost equally unpleasant. I don't know exactly what gases epoxy makes after being burned, but those ain't pleasant either. If you want to make phosgene (COCl2) in t; /archives//html/Amps/1998-10/msg00237.html (8,279 bytes)
232. [AMPS] ?: 8921 Pinout (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sat, 17 Oct 1998 22:58:52 +0100; In a word, weird. It may looks like a 4CX250/350/400 base, but IIRC the control grid is on the pin that's missing from a normal socket, and the center spigot is a heater connection. 73 from Ian G3SEK; /archives//html/Amps/1998-10/msg00245.html (7,386 bytes)
233. [AMPS] Re: Antenna System power ratings (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 20 Oct 1998 22:32:50 +0100; N connectors will handle high power, but only if they are in good condition, perfectly assembled and perfectly mated. Otherwise they're just coaxial fuses. That's really asking for trouble, because a; /archives//html/Amps/1998-10/msg00306.html (10,637 bytes)
234. [AMPS] Connectors (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 20 Oct 1998 21:21:47 +0100; I had good experience with C connectors, until the local supply ran out. The only potential problem is that the "spring" that holds the mated pair firmly together is a rubber gasket, same as in a BNC; /archives//html/Amps/1998-10/msg00307.html (8,697 bytes)
235. [AMPS] connectors (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 21 Oct 1998 07:49:42 +0100; No; Deutsche Industrien Normen is a standards organization that specifies many different types of connectors (and just about anything else that needs to be standardized). BTW, 7/16 is not a fraction; /archives//html/Amps/1998-10/msg00337.html (8,211 bytes)
236. [AMPS] Re: Phosgene Gas (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 21 Oct 1998 13:56:23 +0100; I wrote, earlier: W8AV replied: Yes indeed - but it's only half the story. It is equally important to inform people that smelling a faint trace of phosgene is a warning, not a death sentence. I've se; /archives//html/Amps/1998-10/msg00345.html (8,117 bytes)
237. [AMPS] Re: N connectors (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Thu, 22 Oct 1998 11:36:27 +0100; For those of us who weren't lucky enough to be taught properly, the "improved" N connectors with a captive pin and a top-hap braid ferrule are MUCH easier to assemble correctly. There's no braid to c; /archives//html/Amps/1998-10/msg00355.html (8,700 bytes)
238. [AMPS] High IMD Drivers (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 1 Sep 1998 19:54:16 +0100; Maybe not deadly at HF, but much worse on VHF where the background noise levels are so much lower. That's a real issue for HF/VHF rigs because the same standards do not apply... I mean OUR standards,; /archives//html/Amps/1998-09/msg00015.html (10,229 bytes)
239. [AMPS] 6m KW-class Amp design? (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Thu, 3 Sep 1998 17:18:17 +0100; No problem - my screen and grid bias supplies are fully floating, referenced only to cathode, so you can choose the DC (chassis) ground point to be (a) cathode, (b) grid 1, (c) grid 2, or (d) none of; /archives//html/Amps/1998-09/msg00049.html (8,853 bytes)
240. [AMPS] RE: HV switched mode PSU (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 9 Sep 1998 11:43:07 +0100; If he did, it didn't come to anything. The only reference I have was in an old QEX (index details will be on the ARRL BBS or web site, and ISTR there was a follow-up) which describes a PS for a pair; /archives//html/Amps/1998-09/msg00112.html (7,907 bytes)

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