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References: [ +from:Peter.Chadwick@zarlink.com: 335 ]

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181. [AMPS] Noises in electrolytic capacitors (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 8 Oct 2001 11:06:39 +0100; I'm back - typing one handed, not plastered, possibly a fracture, possibly torn tendons. Most of the last two weeks has been spent in a drug induced haze, so I guess I could have made as much sense a; /archives//html/Amps/2001-10/msg00165.html (10,759 bytes)
182. [AMPS] Noises in electrolytic capacitors (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 8 Oct 2001 14:41:17 +0100; That's fighting talk! A lot of good beer comes from England: a small amount from Wales and Scotland. Belgium produces some very good stuff, and the only decent Budweiser is from Budvar in the Czech r; /archives//html/Amps/2001-10/msg00175.html (8,965 bytes)
183. [AMPS] Tuned Input, what me worry (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Tue, 9 Oct 2001 07:31:10 +0100; A good 'beer' doesn't. In the 16 and 1700's it was common, as country landowner, to 'lay down' a barrel of strong 'ale' on the birth of one's first son, to be broached by all the tenants of the estat; /archives//html/Amps/2001-10/msg00216.html (9,140 bytes)
184. [AMPS] Tuned Input, what me worry (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Tue, 9 Oct 2001 07:58:03 +0100; According to Pappenfus et al., the tank circuit plus the feed cable plus the output network of the driver should be of such length as to make the driver for a g-g stage appear as a constant voltage s; /archives//html/Amps/2001-10/msg00219.html (10,661 bytes)
185. [AMPS] SB-220 cooling (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Tue, 9 Oct 2001 08:02:36 +0100; FWIW, on 4-250As and similar, (same filament structure as the 3-500Z), not being careful about cooling the filament seals has led to trouble in my experience. Including one military rig where it was; /archives//html/Amps/2001-10/msg00220.html (8,263 bytes)
186. [AMPS] RE: Beer (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Tue, 9 Oct 2001 12:43:29 +0100; Another 'home brewer' in more ways than one! Amplifier people and contesters seem to have several things in common - one of them is beer! 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/a; /archives//html/Amps/2001-10/msg00225.html (6,777 bytes)
187. [AMPS] Tuned Input, what me worry (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Thu, 11 Oct 2001 08:04:14 +0100; Rich asked: of The 30S1 with the 4CX1000 certainly did, and I'm pretty sure the 30L1 did in its amateur form, too. But the 30L1 was used for the whole HF range (mainly by the US military - who said C; /archives//html/Amps/2001-10/msg00282.html (8,318 bytes)
188. [AMPS] HV warning (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 15 Oct 2001 08:20:35 +0100; That's a rule that I follow now, but interestingly, back in the '60s, we often went for a beer or two at lunchtime, and back to work in the afternoon - on high power tx's (30kW and up). Even when tes; /archives//html/Amps/2001-10/msg00337.html (7,754 bytes)
189. [AMPS] sockets (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Tue, 16 Oct 2001 13:35:52 +0100; Rich, last week you mentioned making replacement springs from 'austenitic steel'. Just what is that? I've been through Machinery's Handbook and a whole slew of my model engineering text books, but ca; /archives//html/Amps/2001-10/msg00344.html (6,843 bytes)
190. [AMPS] Austenitic steel (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Wed, 17 Oct 2001 08:00:07 +0100; Thanks for all the replies. It would not appear to be the correct steel to use for springs, being too ductile. 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@conte; /archives//html/Amps/2001-10/msg00350.html (6,751 bytes)
191. [AMPS] G3SEK (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Thu, 18 Oct 2001 07:50:48 +0100; Ian is doing well, and should be out of hospital on Sunday. 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@con; /archives//html/Amps/2001-10/msg00371.html (6,583 bytes)
192. [AMPS] Austenitic steel (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Thu, 18 Oct 2001 08:12:14 +0100; Austenite is an unstable (below about 1330 deg F) solution of carbon in iron. The addition of various elements such as chromium and nickel make it stable at lower temperatures, so 'austenitic' steel; /archives//html/Amps/2001-10/msg00372.html (7,799 bytes)
193. [AMPS] Re: 8k ultra/ "tuned input" (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Fri, 19 Oct 2001 07:34:52 +0100; Rectify the output? remove the plate blocking cap and fit a short circuit? let the marketing department loose? 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@conte; /archives//html/Amps/2001-10/msg00390.html (8,518 bytes)
194. [AMPS] Re: 8k ultra/ "tuned input" (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Fri, 19 Oct 2001 07:43:43 +0100; I expect Rich, that you managed a wry smile on hearing that! Maybe it's because the large electrode spacing is such that at low frequencies, the electrons haven't reached the plate before the grid ph; /archives//html/Amps/2001-10/msg00391.html (8,688 bytes)
195. [AMPS] MEASURING FILAMENT VOLTAGE (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 22 Oct 2001 07:47:34 +0100; ..........but in most cases, it drives the DMM mad. Holding off the sensing with say 1Kohm resistors and suitable bypass caps and screened leads might do it, but I've been bitten a number of times by; /archives//html/Amps/2001-10/msg00420.html (7,990 bytes)
196. [AMPS] Cleaning aluminum variable capacitors (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 22 Oct 2001 13:57:04 +0100; A caustic soda bath works, too. About 3 ounces of soda to 1.5 pints of hot water. Quick scrub with a wire brush first. To remove the black deposit afterwards, dip in dilute (15%) nitric acid. Or drop; /archives//html/Amps/2001-10/msg00425.html (7,425 bytes)
197. [AMPS] Choke input PS question (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 22 Oct 2001 14:30:33 +0100; I've used negative lead filtering and tuned choke input very successfully. By using the RIGHT value of capacitor, you can get quite good regulation - in conjunction with a suitable bleeder, of course; /archives//html/Amps/2001-10/msg00427.html (10,177 bytes)
198. [AMPS] Choke input PS question (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 22 Oct 2001 14:49:40 +0100; As I said in my previous, you don't actually resonate the choke. A parallel tuned circuit looks like a pure resistance at resonance. That's using the definition of resonance that applied voltage and; /archives//html/Amps/2001-10/msg00429.html (9,756 bytes)
199. [AMPS] Choke input PS question (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 22 Oct 2001 15:59:29 +0100; I'd say DON'T do it anyway. Of course Rich, you realise that you can't use a 3-500z as a variable load when testing the system, as 100 or 120Hz is below its cut off frequency!!!!!!! 73 Peter G3RZP --; /archives//html/Amps/2001-10/msg00432.html (8,588 bytes)
200. [AMPS] Choke input PS question (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 22 Oct 2001 16:19:06 +0100; But you mustn't use too much nichrome wire....... 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.co; /archives//html/Amps/2001-10/msg00434.html (8,409 bytes)

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