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

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181. [AMPS] Bird meters (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 2 Oct 2000 12:54:12 +0100; Thanks for the comment, Tom: I measured it as 1430 ohms, but I'm figuring 1400 is probably close enough. Of course, it doesn't alter the fact that readings are only guaranteed to 5% of FSD any how. 7; /archives//html/Amps/2000-10/msg00025.html (8,593 bytes)
182. [AMPS] Feedback path 3-500Z (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 2 Oct 2000 13:00:09 +0100; So what spec an settings were used (dispersion, bandwidth, sweep time etc?) 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests:; /archives//html/Amps/2000-10/msg00030.html (8,283 bytes)
183. [AMPS] Feedback path 3-500Z (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 2 Oct 2000 13:12:43 +0100; How do you know with a frequency domain instrument that it is damped ringing? Wouldn't an oscilloscope (maybe with a high pass filter to get rid of fundamental overload be the correct instrument to u; /archives//html/Amps/2000-10/msg00033.html (8,488 bytes)
184. [AMPS] Feedback path 3-500Z (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 2 Oct 2000 13:17:41 +0100; I've never found ringing. I have found a 'parasitic' resonance which accentuated a harmonic, although the PA in question didn't oscillate. But pulsing wasn't necessary to find that. I guess if one pu; /archives//html/Amps/2000-10/msg00034.html (8,645 bytes)
185. [AMPS] Bird meters (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 2 Oct 2000 15:22:46 +0100; I can even add peak reading! (although I probably won't bother) Tnx fer the help, guys. Makes a change from wrangling about parasitics! 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amp; /archives//html/Amps/2000-10/msg00037.html (8,788 bytes)
186. [AMPS] Feedback path 3-500Z (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 2 Oct 2000 15:26:04 +0100; 'spec an' - industry standard abbreviation for 'spectrum analyser' 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQU; /archives//html/Amps/2000-10/msg00039.html (8,280 bytes)
187. [AMPS] Bird meters (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 2 Oct 2000 15:39:24 +0100; I suppose nobody has got the holes for the meters to mount on the panel in? Guess I'll have to just cut those myself!!! 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: a; /archives//html/Amps/2000-10/msg00043.html (8,696 bytes)
188. [AMPS] collins 30L - 1 (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 2 Oct 2000 15:41:02 +0100; an Is it a phase comparator, or an amplitude comparator? 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contes; /archives//html/Amps/2000-10/msg00044.html (7,177 bytes)
189. [AMPS] Bird meters (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Thu, 5 Oct 2000 08:52:16 +0100; Carsten, Thank you very much for your offer. Sorry I haven't replied before - I've been out sick these last two days. The problem is that holes from Denmark will meet EU requirements, but I need impe; /archives//html/Amps/2000-10/msg00090.html (9,316 bytes)
190. [AMPS] SB200 Retrofit (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Fri, 6 Oct 2000 14:42:11 +0100; Does anyone know why the Collins advertising material for the 30L1 talked about 'RF inverse feedback' and not 'negative feedback'? (Omitting for the moment the fact that the 220pF capcitors gave a no; /archives//html/Amps/2000-10/msg00102.html (8,253 bytes)
191. [AMPS] amp project: 4-400s X 4 (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 9 Oct 2000 07:44:53 +0100; My screen supply is the old fashioned approach with a 5R4 rectifier. Choke input with negative lead filtering, and a 6X5 to rectify the ripple across the choke, thus providing bias. Bias supply regul; /archives//html/Amps/2000-10/msg00136.html (9,850 bytes)
192. [AMPS] Bird meters (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 9 Oct 2000 08:01:22 +0100; The project is coming along. Electronics done, paint disappointing. Does anybody know a good way of producing the longitudinal slots on a piece of 1/8inch diameter brass rod so that it fits the centr; /archives//html/Amps/2000-10/msg00137.html (8,837 bytes)
193. [AMPS] Bird meters (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 9 Oct 2000 13:59:27 +0100; It's rod, not tube. But what is Dremel tool? Don't believe we have them here - I don't remember seeing them in the tool catalogues. Hacksawing the rod is the problem - my hand sawing isn't that accur; /archives//html/Amps/2000-10/msg00141.html (8,372 bytes)
194. [AMPS] Bird meters (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 9 Oct 2000 16:03:43 +0100; Yes, that's a variant on what I tried when I bust the slitting saw. The slitting saw is a 3 inch diameter circular saw, 1/64 inch thick. Mounts on an arbour in the vertical mill, allowing the whole l; /archives//html/Amps/2000-10/msg00147.html (10,070 bytes)
195. [AMPS] amp project: 4-400s X 4 (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 9 Oct 2000 17:15:26 +0100; Junk ceases to be junk when you dump it - and then find 30 minutes after the garbage truck came by that you need it! 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amp; /archives//html/Amps/2000-10/msg00149.html (8,059 bytes)
196. [AMPS] amp project: 4-400s X 4 (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 10 Oct 2000 08:56:01 +0100; At least the tubes help keep the house warm - and with the current price of heating oil, that's useful.............plus they cost NOTHING! My dad bought that 6L6 in 1936, and I want his money's worth; /archives//html/Amps/2000-10/msg00162.html (8,702 bytes)
197. [AMPS] Bird meters (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 10 Oct 2000 09:01:11 +0100; $8!! $8!! That's 2 pints of beer!! They're probably about 10 UK pounds then, over here - 4 pints of beer. And also about 16 weeks delivery. Knowing how mean I am, is that likely to appeal? The block; /archives//html/Amps/2000-10/msg00163.html (8,116 bytes)
198. [AMPS] Drive for 4xRS1007 (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 10 Oct 2000 09:52:44 +0100; Firson asks: About 95 - at LF. The input capacity will be about 50pf for all those tubes, so the SWR on 28MHz will be a bit higher than on the LF bands. (50 ohms in parallel with j112). If you have a; /archives//html/Amps/2000-10/msg00165.html (9,729 bytes)
199. [AMPS] MFJ-259B Question (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Wed, 11 Oct 2000 11:18:44 +0100; It was shown that with a 50 ohm directional coupler system, loads of around 10kohm can give answers between , if I remember, 3k and 30k or something like that, all depending on the directivity of the; /archives//html/Amps/2000-10/msg00175.html (9,575 bytes)
200. [AMPS] MFJ-259B Question (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Wed, 11 Oct 2000 12:46:18 +0100; Well, a G-R bridge with its tuned detector (aka 'receiver') and a signal generator should do it just fine. If the noise bridge has a tuned detector, that should do it too. 73 Peter G3RZP -- FAQ on WW; /archives//html/Amps/2000-10/msg00177.html (8,914 bytes)

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