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

Total 419 documents matching your query.

241. [AMPS] 1296 MHz Power Amplifiers (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sun, 13 Sep 1998 09:45:37 +0100; Most of the failures are due to incorrect loading and no grid current meter! The output coupling on many 1296/2304 cavity amps doesn't really work, and hardly ever has a real loading control. And if; /archives//html/Amps/1998-09/msg00151.html (7,943 bytes)
242. [AMPS] High Volt Fluke type probes (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sun, 27 Sep 1998 14:05:41 +0100; I did almost exacty the same as Rich, except for using a long string of small oxide film resistors (20 x 1.5M, 500V rating). The resistors are mounted inside a plastic tube (ball-pen case) with a tes; /archives//html/Amps/1998-09/msg00297.html (8,701 bytes)
243. [AMPS] Biasing MOSFET Power Transistors (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Thu, 2 Jul 1998 19:26:00 +0100; Take a look at 'Radio Frequency Transistors' by Dye & Granberg of Motorola (published by Butterworth-Heinemann, ISBN 0-7506-9059-3) and also at the individual Motorola data sheets and Application Rep; /archives//html/Amps/1998-07/msg00016.html (9,940 bytes)
244. [AMPS] Why class B?? (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sun, 5 Jul 1998 10:08:53 +0100; Maybe the tube data tables in the ARRL Handbook. They use "GG" to mean "grid and screen both connected to ground", which is presumably what Lane was asking about. This abbreviation adds to the confus; /archives//html/Amps/1998-07/msg00026.html (8,949 bytes)
245. [AMPS] 3CX800 grid rings? (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Thu, 9 Jul 1998 21:43:37 +0100; Where can I buy two 3CX800 grid collets (Eimac # 720359 or #882931) by credit card and without minimum order problems, please? Don't see any in the RF parts catalog. 73 from Ian G3SEK Editor, 'The VH; /archives//html/Amps/1998-07/msg00052.html (7,054 bytes)
246. [AMPS] 3CX800 grid rings? (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Fri, 10 Jul 1998 08:04:40 +0100; Thanks, everybody - I have plenty of good ideas now! 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; /archives//html/Amps/1998-07/msg00054.html (7,196 bytes)
247. [AMPS] Wanted: 2 X 4CX250r amp article (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 15 Jul 1998 07:21:53 +0100; The Plumber's Special does work, but there are now better designs that avoid the problems of lead-screw tuning, and don't blow hot air through the tuned circuit. If you want a push-pull amplifier, th; /archives//html/Amps/1998-07/msg00077.html (8,545 bytes)
248. [AMPS] RE: Pencils and fiery inch-long arcs! (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 22 Jul 1998 23:52:15 +0100; Actually it isn't the HV energy that sends you flying, it's the violent muscle contraction. The shock makes *you* supply the effort to leap across the room and hurt yourself, which is really adding i; /archives//html/Amps/1998-07/msg00153.html (8,065 bytes)
249. [AMPS] Re SSB power (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Thu, 23 Jul 1998 08:07:49 +0100; My RadCom column for August summarizes an earlier discussion on the same topic, here on AMPS a few months ago. The closer you come to the margin between success and failure, as in EME, the more every; /archives//html/Amps/1998-07/msg00154.html (8,233 bytes)
250. [AMPS] Non-inductive resistors (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 3 Jun 1998 07:36:50 +0100; Guessing at the length and diameter of a 5W resistor and using Tom's estiamte of "about five" turns, the usual formula for the inductance of a solenoid gives results somewhere in the right area. I wo; /archives//html/Amps/1998-06/msg00039.html (8,559 bytes)
251. [AMPS] Non-inductive resistors (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 3 Jun 1998 19:17:09 +0100; Thanks, Tom. 43.5 nH to 49.3 nH measured; 48.6 nH calculated from the standard formula for solenoid coils. Maybe that was lucky, but it seems like the formula is a good place to start, for those of u; /archives//html/Amps/1998-06/msg00044.html (8,542 bytes)
252. [AMPS] Non-inductive resistors (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 3 Jun 1998 19:21:34 +0100; They will have some effect, but not a large one because the magnetic coupling is not very tight in a solenoid that doesn't have a magnetic core. That's also why you can use a shorting band-switch on; /archives//html/Amps/1998-06/msg00045.html (8,145 bytes)
253. [AMPS] Non-inductive resistors (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Thu, 4 Jun 1998 08:28:18 +0100; Yes, probably some luck is involved, but this is actually twice in a row that the formula has been useful for design purposes. The other one involved a bunch of very small 1k 2W metal film resistors; /archives//html/Amps/1998-06/msg00056.html (9,342 bytes)
254. [AMPS] kW solid state amps (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Fri, 5 Jun 1998 19:08:05 +0100; Unfortunately the hardback book is no longer available as a freebie, at least in the UK, but Farnell sell it for £19.95 (no postage charge). However, Motorola's "own-brand" Handbooks are still; /archives//html/Amps/1998-06/msg00084.html (7,874 bytes)
255. [AMPS] Need Millen HV connectors (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Fri, 5 Jun 1998 19:24:50 +0100; Coax is much safer than single-wire B+ connectors because it makes an automatic ground connection between the two chassis. MHV connectors are supposed to be made for the job. They are a kind of stret; /archives//html/Amps/1998-06/msg00085.html (9,244 bytes)
256. [AMPS] FS: THE TETRODE BOARDS - power and protection for your PA (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White); Date: Thu, 18 Jun 1998 11:28:12 +0100; This announcement will appear only once in each relevant mailing list. ** THE TETRODE BOARDS are based on G3SEK's article 'Power and Protection for Modern Tetrodes' in QEX for October 1997. * 'Univer; /archives//html/Amps/1998-06/msg00198.html (8,996 bytes)
257. [AMPS] staggered resonance effects in VHF suppressors (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Thu, 18 Jun 1998 22:24:10 +0100; Peter, G3RZP sends his apologies: he'll be away from work for some days with sciatica, and will have to miss the rest of this interesting discussion. 73 from Ian G3SEK -- FAQ on WWW: http://www.conte; /archives//html/Amps/1998-06/msg00205.html (7,216 bytes)
258. [AMPS] Another arc question (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Thu, 7 May 1998 14:02:46 +0100; Proof, please? 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.contesting.com/ampfaq.html Subm; /archives//html/Amps/1998-05/msg00084.html (8,872 bytes)
259. [AMPS] Another arc question (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Fri, 8 May 1998 13:51:52 +0100; But that's only a high-voltage, low-current glow discharge. The highpot tester cannot create a low-voltage, high-current arc. Only the B+ supply has the muscle to do that. As far as I can see, the da; /archives//html/Amps/1998-05/msg00102.html (10,440 bytes)
260. [AMPS] Another arc question (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Fri, 8 May 1998 13:54:55 +0100; Sorry, Rich, that's flat-out wrong. I wonder if you truly understand series-parallel transformations. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist for RadCom (RSGB) http://; /archives//html/Amps/1998-05/msg00103.html (9,783 bytes)

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