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References: [ +from:Peter_Chadwick@mitel.com: 967 ]

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221. [AMPS] 814 AMP (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 17 Oct 2000 12:49:34 +0100; It looks from the characteristics very like a pentode equivalent to a 812 in terms of volts, power and so on. 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contes; /archives//html/Amps/2000-10/msg00437.html (7,194 bytes)
222. [AMPS] Commercial amp design on AMPS (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 17 Oct 2000 13:27:46 +0100; Nor can they offer too much meaningful advice on amplifiers! OK, I realise some people make that complaint about this list, too. 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submi; /archives//html/Amps/2000-10/msg00440.html (8,029 bytes)
223. [AMPS] protection (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 17 Oct 2000 13:31:35 +0100; Tom, is there a source of cheap differential switches that will operate down to, say, 0.1 inch WG? 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Ad; /archives//html/Amps/2000-10/msg00441.html (6,811 bytes)
224. [AMPS] RF high power tube (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Thu, 19 Oct 2000 16:33:35 +0100; What's ICRH? I always enjoy John's postings; they are, after all, from a professional in high power RF! 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.c; /archives//html/Amps/2000-10/msg00472.html (6,980 bytes)
225. [AMPS] Bias for Triode (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Fri, 20 Oct 2000 12:19:30 +0100; The 304TL can be used in Class AB1. However, the data for it is in Class AB1 grounded cathode push - pull audio service. For use at RF, it would need to be in AB1 grounded cathode, not grounded grid.; /archives//html/Amps/2000-10/msg00489.html (7,986 bytes)
226. [AMPS] source of remote drive motors (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 4 Sep 2000 15:58:45 +0100; I picked up some super jobs at Dayton the other year for $1 each. 12volt, about 25 rpm, lots of torque. There's a lot of these motors around, especially if you don't want a production run's worth. I; /archives//html/Amps/2000-09/msg00071.html (9,437 bytes)
227. [AMPS] TL-922A Again... (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Thu, 7 Sep 2000 09:54:06 +0100; Tom, do you consider that this applies to all the similar zirconium coated tubes (Eimac 4-125A, 4-250A, 4-400A etc)? I know the carbon anode version of these tubes made in Europe appear perfectly OK; /archives//html/Amps/2000-09/msg00188.html (7,445 bytes)
228. [AMPS] Big muthah soldering iron (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Thu, 7 Sep 2000 09:57:52 +0100; I gave up on trying to find one. A hot air paint stripping gun works better to get the PL259 body up to temp very quickly;after that, a 40 watt Weller TCP with a number 8 bit works fine - that's on R; /archives//html/Amps/2000-09/msg00189.html (7,770 bytes)
229. [AMPS] Blown TL922A... What to do? (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Thu, 7 Sep 2000 10:00:08 +0100; Only in your definition of resonance. Not in the one generally accepted professionally - that V and I at the input are in phase. 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submi; /archives//html/Amps/2000-09/msg00190.html (9,109 bytes)
230. [AMPS] heating tubes.... (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Thu, 7 Sep 2000 10:11:10 +0100; Only in a limited circle. 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@c; /archives//html/Amps/2000-09/msg00192.html (7,692 bytes)
231. [AMPS] Blown TL922A... What to do? (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Thu, 7 Sep 2000 10:40:28 +0100; The corollary to Tom's statement is that a tube with the anode parasitic circuit resonant at a frequency below that of the grid parasitic circuit will not oscillate. See Terman's 'Radio Engineering'.; /archives//html/Amps/2000-09/msg00195.html (9,408 bytes)
232. [AMPS] Blown TL922A... What to do? (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Thu, 7 Sep 2000 17:36:15 +0100; There are three things certain in life........... Death (Even that's not quite so sure with modern medicine) Taxes And the fact that the parasitic debate will never end, only occasionally be suppress; /archives//html/Amps/2000-09/msg00220.html (9,128 bytes)
233. [AMPS] Blown TL922A... What to do? (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Fri, 8 Sep 2000 08:27:08 +0100; I'll ask again: What is the standard TL922 parasitic suppressor? If it's the usual carbon resistor/shunt inductor, I could well imagine parasitics starting after a period, as the resistor has probabl; /archives//html/Amps/2000-09/msg00273.html (9,929 bytes)
234. [AMPS] Blown TL922A... What to do? (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Fri, 8 Sep 2000 13:52:09 +0100; With respect, Tom, I think you're falling into the same trap Rich does - generalising from insufficient evidence. Consider the case where there is a resonance of the the tube output capacity in serie; /archives//html/Amps/2000-09/msg00280.html (11,036 bytes)
235. [AMPS] Blown TL922A... What to do? (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Fri, 8 Sep 2000 15:05:54 +0100; Another sweeping generalisation! Because a tube with the plate parasitic resonance BELOW the grid parasitic resonance doesn't oscillate, a plain inductor can clear it up. If I remember correctly, was; /archives//html/Amps/2000-09/msg00283.html (9,659 bytes)
236. [AMPS] Blown TL922A... What to do? (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Fri, 8 Sep 2000 15:43:44 +0100; That doesn't mean it can't happen - only that you haven't seen it. Getting a sufficiently high impedance of R very high in series with absolutely j0. Assume the stray capacity to ground from the swit; /archives//html/Amps/2000-09/msg00288.html (10,670 bytes)
237. [AMPS] Blown TL922A... What to do? (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Fri, 8 Sep 2000 15:46:17 +0100; resonance doesn't oscillate, No, Rich, totally true. While that condition is valid, it doesn't and can't oscillate. This is 1920's technology - see Mr. Miller (his name, not his occupation). 73 Peter; /archives//html/Amps/2000-09/msg00289.html (9,264 bytes)
238. [AMPS] Blown TL922A... What to do? (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Fri, 8 Sep 2000 16:40:39 +0100; Not necessarily. Depends on the relative values. But it is speculative........ But there is a finite chance she'll win. Not me - I don't buy tickets on the basis that lotteries are a tax on people wh; /archives//html/Amps/2000-09/msg00293.html (9,770 bytes)
239. [AMPS] Anyone ready to go back to talking about CBers? (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Fri, 8 Sep 2000 17:29:50 +0100; lately..- Your definition of 'technical' may be different to mine. 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQU; /archives//html/Amps/2000-09/msg00298.html (7,179 bytes)
240. [AMPS] Logic v. Magic (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Fri, 8 Sep 2000 18:01:35 +0100; I think it's fair to install a new (i.e. replacement of original) or 'improved in terms of reliability' suppressor after the original has failed, or even, if the failure mode is well established as a; /archives//html/Amps/2000-09/msg00304.html (8,651 bytes)

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