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1. [AMPS] Re: Serious debate: Dynamic IMD testing (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 29 Mar 2000 21:21:46 +0100; In fact, there is a serious point behind my suggestion. Devising a test signal that adequately simulates the characteristics of the human voice is extremely difficult - and even when you've done it,; /archives//html/Amps/2000-03/msg01064.html (12,698 bytes)
2. [AMPS] 3/2 power law and Rich's very wide signal (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 29 Mar 2000 15:17:17 +0100; The world clearly needs a standard reference .wav file. Now who shall we nominate? 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.com/g3; /archives//html/Amps/2000-03/msg01054.html (10,450 bytes)
3. [AMPS] 3/2 power law and Rich's very wide signal (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 28 Mar 2000 16:45:36 +0100; Or was that 2 milliseconds? If Mr Thornley were still alive, you'd very quickly regret making that cheap shot. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist for RadCom (RSGB; /archives//html/Amps/2000-03/msg01015.html (9,279 bytes)
4. [AMPS] The G2DAF Amplifier; Intents and Purposes (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sun, 26 Mar 2000 20:16:57 +0100; Let G2DAF speak for himself - you can download his original articles from my web site. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.com; /archives//html/Amps/2000-03/msg00959.html (9,943 bytes)
5. [AMPS] Hi Pot Transformer (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 22 Mar 2000 07:45:12 +0000; Agreed - otherwise you miss some very important information about *when* breakdown begins. I've had very good results with a small laser(?) power supply module which consists of a one-transistor osci; /archives//html/Amps/2000-03/msg00898.html (9,344 bytes)
6. [AMPS] G2DAF (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 21 Mar 2000 19:12:38 +0000; Oh you already missed all the fun, Ron! And all the fun before that... The original G2DAF article is posted as a PDF on my web site for historical information, at www.ifwtech.com/g3sek/g2daf.htm 73 f; /archives//html/Amps/2000-03/msg00873.html (7,456 bytes)
7. [AMPS] Hot Switching (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 21 Mar 2000 14:48:07 +0000; OK, so it really is a delay imposed by the rig's T/R controller. What we're trying to do, then, is to bypass the controller's 7ms delay on key-DOWN, but to leave the controller to handle the key-UP e; /archives//html/Amps/2000-03/msg00862.html (10,558 bytes)
8. [AMPS] Hot Switching (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Mon, 20 Mar 2000 20:21:25 +0000; All transceivers have some break delay, in order to avoid hot-switching their own internal TX/RX systems. My suggestion would not affect the existing break timing - it would only speed up the make s; /archives//html/Amps/2000-03/msg00851.html (8,944 bytes)
9. [AMPS] Hot Switching (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Mon, 20 Mar 2000 08:08:43 +0000; That's a good point, Dick - did you measure the 7ms delay in the FT-990 using the transistor remote switching option, or the relay option? Another possibility for the 990 might be to route the key cl; /archives//html/Amps/2000-03/msg00834.html (9,371 bytes)
10. [AMPS] Books (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sat, 18 Mar 2000 22:19:55 +0000; Given that information, try www.bookfinder.com which serves a network of book dealers. Occasional copies of Pappenfus turn up there, and there usually seem to be lots of copies of Terman and the Radi; /archives//html/Amps/2000-03/msg00811.html (9,822 bytes)
11. [AMPS] Receiver performance (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 15 Mar 2000 07:59:48 +0000; Which "that" are you referring to, Tom - the good low-noise performance of the selective DSP filters, or the ineffectiveness of the DSP noise reduction? 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book; /archives//html/Amps/2000-03/msg00696.html (10,281 bytes)
12. [AMPS] Re: New G2DAF amplifier information (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 15 Mar 2000 07:52:11 +0000; [snip] Please, let's not start that empty argument again! Neither of you is saying anything new. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist for RadCom (RSGB) http://www.i; /archives//html/Amps/2000-03/msg00695.html (9,212 bytes)
13. SV: [AMPS] New G2DAF amplifier information (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 14 Mar 2000 22:38:45 +0000; There is no more, unless/until I get to RSGB HQ and find something of relevance in G2DAF's old notes. It would be fun to revive the original amplifier and put it through the mill with modern test equ; /archives//html/Amps/2000-03/msg00692.html (7,654 bytes)
14. [AMPS] Receiver performance (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 14 Mar 2000 14:11:38 +0000; When doing a comparative review of several DSP audio filters, I found that most - but significantly not all - units gave good CW filtering performance right down to the lowest signal/noise ratios. I; /archives//html/Amps/2000-03/msg00673.html (10,660 bytes)
15. [AMPS] New G2DAF amplifier information (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 14 Mar 2000 07:06:52 +0000; Thanks to the RSGB Library, the original G2DAF article is now downloadable as a PDF file from my web site: http://www.ifwtech.demon.co.uk/g3sek/g2daf.htm The pages are reproduced without technical co; /archives//html/Amps/2000-03/msg00651.html (8,209 bytes)
16. [AMPS] Rocky Point effects (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Fri, 10 Mar 2000 14:09:03 +0000; I had written: Rich Measures replied: Oh no, not enough yet... I respect to your practical experience of HF amps, but I will not defer to your ignorance. Many contributors to this list have qualifica; /archives//html/Amps/2000-03/msg00538.html (11,893 bytes)
17. [AMPS] Rocky Point effects (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Thu, 9 Mar 2000 22:20:20 +0000; Nobody mentioned "instant" gettering. I said a timescale of seconds. The reaction is chemical. No electrical power is required. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist; /archives//html/Amps/2000-03/msg00508.html (9,491 bytes)
18. [AMPS] VHF visitation (was power handling...) (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Thu, 9 Mar 2000 17:35:10 +0000; And parasitics in a vacuum are not? 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; /archives//html/Amps/2000-03/msg00506.html (8,441 bytes)
19. [AMPS] Rocky Point effects (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Thu, 9 Mar 2000 13:07:48 +0000; Yes. If there is a small gas release, the gettering action (which depends on the gas molecules colliding with the metal surfaces) would take place on a timescale of seconds. That's way too slow to pr; /archives//html/Amps/2000-03/msg00503.html (9,792 bytes)
20. [AMPS] Suppressor measurements (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 8 Mar 2000 08:23:15 +0000; That's a very generous offer, Fred - but before you go ahead, you'd be well advised to check what happened the last time. Search DejaNews from about September 1997 onwards, and look for "N7WS". Befor; /archives//html/Amps/2000-03/msg00452.html (7,990 bytes)

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