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References: [ +from:peter.chadwick@zarlink.com: 335 ]

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221. [AMPS] Distortion, amp design, and 813s (newbie alert!!) (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Thu, 20 Sep 2001 07:48:46 +0100; The biggest advantage of push pull is that you'll have less trouble with the output capacitance at the higher frequencies. Even so, 813's above about 21MHz are getting a bit high on output capacity.; /archives//html/Amps/2001-09/msg00357.html (10,665 bytes)
222. [AMPS] IMD (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Thu, 20 Sep 2001 07:50:49 +0100; It had better, even if it means modifying the noise source. Unfortunately, many noise sources don't. 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com; /archives//html/Amps/2001-09/msg00358.html (7,886 bytes)
223. [AMPS] Distortion Measurement Distortion (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Thu, 20 Sep 2001 07:55:02 +0100; And the display 'bloom' if you have the intensity up too far! But there, modern spectrum analysers put the intelligence behind the front panel. The 141 and its ilk require the intelligence between th; /archives//html/Amps/2001-09/msg00359.html (8,220 bytes)
224. [AMPS] Distortion Measurement Distortion (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Thu, 20 Sep 2001 11:00:41 +0100; Tom, What's wrong with using the 'peak hold' function? 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesti; /archives//html/Amps/2001-09/msg00365.html (7,858 bytes)
225. [AMPS] Series C at tube, Sorry, for C read L (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Thu, 20 Sep 2001 12:52:20 +0100; Don't C's and L's interchange when you get into the southern hemisphere, then? 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative request; /archives//html/Amps/2001-09/msg00367.html (7,445 bytes)
226. [AMPS] Distortion Measurement Distortion (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Fri, 21 Sep 2001 07:20:18 +0100; Classic case of misunderstanding by me of what Tom meant! 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@conte; /archives//html/Amps/2001-09/msg00385.html (7,786 bytes)
227. [AMPS] FT100D driving Alpha 87a (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Fri, 3 Aug 2001 08:26:54 +0100; Not quite Class C - it would be about 7 or 8 dB worse in that case! Tom is correct though - it is really unacceptably poor. I believe there are two parts to this: 1. A demand (or a belief that there'; /archives//html/Amps/2001-08/msg00023.html (9,838 bytes)
228. [AMPS] Water dielectric? (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Fri, 3 Aug 2001 08:33:51 +0100; Of course, you couldn't use water if the cap had DC on it. Eventually, it would leach something out of the cap that would cause some conduction, and then you would get electrolysis. The problem with; /archives//html/Amps/2001-08/msg00024.html (6,931 bytes)
229. [AMPS] RE: TS-2000 (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Fri, 3 Aug 2001 15:26:48 +0100; Well, yes...............and no. At high/very high speeds, the rise and fall times can be a greater percentage of the dot. But the main point there is the claim that at high speeds, hard edges are eas; /archives//html/Amps/2001-08/msg00031.html (7,686 bytes)
230. [AMPS] Kenwood ts2000 driving a G2DAF amp (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 6 Aug 2001 08:11:21 +0100; Tom, you're not trying to tell us that DSP is not the be-all and end-all, best thing since sliced bread, guaranteed snake oil cure for fogs, high wind and indigestion, helps babies while teething, th; /archives//html/Amps/2001-08/msg00063.html (9,248 bytes)
231. [AMPS] TS830S Vs FT-102 and TS930S (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 6 Aug 2001 08:59:05 +0100; The FT102 is quite a good rig BUT........ 1. The key clicks on most of the various production series are such that it is unfit for human consumption. That can be cured. Yaesu's mod for this still lea; /archives//html/Amps/2001-08/msg00064.html (9,465 bytes)
232. [AMPS] TS830S Vs FT-102 and TS930S (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 6 Aug 2001 11:30:52 +0100; Maybe you needed to fix those 'minor' points I listed, Mauri. Some, like the spurs on receive, took around 24 hours of effort with test gear borrowed from work that cost more than my house was worth; /archives//html/Amps/2001-08/msg00067.html (7,515 bytes)
233. [AMPS] Linear AMP timing (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Tue, 7 Aug 2001 08:12:43 +0100; This depends a bit on the form of the relay. If the relay at the output is a changeover type, then you still can get the hot switching problem, albeit only(!) with the drive power. It is all very de; /archives//html/Amps/2001-08/msg00076.html (9,005 bytes)
234. [AMPS] RF sensing (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 13 Aug 2001 11:26:03 +0100; RF is What about the situation where switching is done by PIN diodes? There must be a finite time during which the transceiver and/or amp see a high VSWR, but this could well be short enough that it; /archives//html/Amps/2001-08/msg00133.html (8,126 bytes)
235. [AMPS] RF sensing (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 13 Aug 2001 16:02:23 +0100; My thoughts, too. I discussed this sometime back with George, W2VJN, and he had his reservations. Depending on the volts you are switching, an opto isolator can be a convenient level shift/isolation; /archives//html/Amps/2001-08/msg00135.html (7,893 bytes)
236. [[AMPS] Tetrode poor IMD performance ] (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Thu, 16 Aug 2001 07:37:14 +0100; In the professional field, IMD at -36dB rel PEP from a two tone test has been considered adequate for many years for ISB operation, even with multi channel telegraphy on a sideband where the individu; /archives//html/Amps/2001-08/msg00149.html (7,216 bytes)
237. [AMPS] Big Bangs (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 9 Jul 2001 16:18:42 +0100; However, I've got some pre WW2 electrolytics (8 mFd, 450 volt) that still measure fine for capacity and leakage(under 10 microamps at 400v). Probably because they were (are) in a receiver power suppl; /archives//html/Amps/2001-07/msg00116.html (7,736 bytes)
238. [AMPS] Oil Filled Capacitors (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Tue, 10 Jul 2001 16:26:50 +0100; Do they have a rating in terms of maximum discharges of so much energy per second or whatever? If so, it should be possible to equate the energy back to a ripple current. One would expect that for en; /archives//html/Amps/2001-07/msg00140.html (8,973 bytes)
239. [AMPS] close ratings (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Wed, 18 Jul 2001 08:21:21 +0100; cycle Is it not the case that this is only true when the loading is correct? 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests:; /archives//html/Amps/2001-07/msg00203.html (7,255 bytes)
240. [AMPS] FT100D driving Alpha 87a (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Fri, 27 Jul 2001 07:54:44 +0100; Despite the various widely differing opinions on many amplifier subjects discussed here, there seems to be a general consensus that ALC is not always totally wholly desirable, and can actually be a v; /archives//html/Amps/2001-07/msg00323.html (8,947 bytes)

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