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101. [AMPS] Power Supply Diodes (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Fri, 4 Feb 2000 15:32:34 -0800; Can't claim practical experience, but I did run a Spice simulation. I assumed the primary R effect doubled the secondary Rs, and I assumed about 4.5kV dc (didn't keep a copy of your original post).; /archives//html/Amps/2000-02/msg00069.html (8,838 bytes)
102. [AMPS] Power Supply Diodes (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Mon, 7 Feb 2000 10:44:10 -0800; 40ms In general, over react. The problem can be quite subtle - The basic, international ageed spec for a rectifier might have very few parameters, say reverse breakdown voltage, forward drop at some; /archives//html/Amps/2000-02/msg00086.html (10,148 bytes)
103. [AMPS] Re:HV solid state PAs (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Fri, 11 Feb 2000 08:10:05 -0800; are interesting. I have done class AB implementation has Semelab. See www.semelab.co.uk - they make all sorts of stuff. The rf power fets are wonderful to use, but not cheap. The APT transistors cer; /archives//html/Amps/2000-02/msg00199.html (7,344 bytes)
104. [AMPS] IMD Question (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Mon, 14 Feb 2000 09:33:13 -0800; at I've never tried to arrive at the formula mathematically, but I did do some empirical tests a long time ago. In my experience, the formula holds at 0.5-2dB gain compression, but only if the amplif; /archives//html/Amps/2000-02/msg00232.html (10,696 bytes)
105. [AMPS] IMD Question (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Tue, 15 Feb 2000 11:27:13 -0800; If the spectrum analyser indicates that the output contains insignificant harmonic levels, then a thermal power meter is fine. The characterisation is of non-linearity in the fundamental frequency, w; /archives//html/Amps/2000-02/msg00252.html (11,433 bytes)
106. [AMPS] IMD Question (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Tue, 15 Feb 2000 15:33:26 -0800; --Original Message-- From: Steve Harrison <ko0u@os.com> To: Steve Thompson <rfamps@ic24.net> Cc: amps@contesting.com <amps@contesting.com> To: <amps@contesting.com> Date: 15 February 2000 05:23 Subje; /archives//html/Amps/2000-02/msg00258.html (9,613 bytes)
107. [AMPS] RE: ALC (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Wed, 16 Feb 2000 09:23:40 -0800; and regardless And FT990 and .. and... In practice, it's likely that the menu power setting simply sets a reference level in the ALC system so you retain all of the dynamic problems. Steve -- FAQ on; /archives//html/Amps/2000-02/msg00277.html (8,415 bytes)
108. [AMPS] RE: ALC (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Wed, 16 Feb 2000 18:14:45 -0800; Mine certainly offends with a nasty little overshoot of a few 100 us on rising edges whenever there is any ALC action. It depends on the excess gain in the transmit chain and varies with power and f; /archives//html/Amps/2000-02/msg00289.html (9,376 bytes)
109. [AMPS] RE: ALC (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Thu, 17 Feb 2000 10:11:04 -0800; Not quite useless - if you can see spikes, you know there is splatter and you have a way to see improvements. Once you can't see spikes, then you have to listen. Steve -- FAQ on WWW: http://www.cont; /archives//html/Amps/2000-02/msg00302.html (8,319 bytes)
110. [AMPS] interesting SS amps (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Thu, 17 Feb 2000 10:42:47 -0800; What does it do into 3:1 all phases? With such a big FET you might get away with it, but I'd wear safety specs to stop bits of exploding package going in my eyes :-) Steve -- FAQ on WWW: http://www.; /archives//html/Amps/2000-02/msg00303.html (8,421 bytes)
111. [AMPS] RE: ALC (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Thu, 17 Feb 2000 10:50:41 -0800; We never got as far as finding that problem. Yes, thinking about the total gain after the crystal filter when the ALC hasn't wound it back, it's obviously going to be a problem. I guess we should be; /archives//html/Amps/2000-02/msg00304.html (9,379 bytes)
112. SV: [AMPS] RE: ALC (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Thu, 17 Feb 2000 11:04:16 -0800; below compression In my case, I don't see the spike when there is no ALC indication on the meter. If the decay time is long enough, it should be a pep limit. In the FT990, there is a transistor which; /archives//html/Amps/2000-02/msg00305.html (9,485 bytes)
113. [AMPS] interesting SS amps (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Fri, 18 Feb 2000 16:09:48 -0800; --Original Message-- From: phil <phil@invest.fsbusiness.co.uk> To: Steve Thompson <rfamps@ic24.net> Cc: amps@contesting.com <amps@contesting.com> To: <amps@contesting.com> Date: 18 February 2000 03:1; /archives//html/Amps/2000-02/msg00321.html (9,232 bytes)
114. [AMPS] TRANS WORLD TRANSISTOR INFO REQEST (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Sun, 20 Feb 2000 09:43:12 -0800; House Are they FETs or bipolars? Steve -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps; /archives//html/Amps/2000-02/msg00388.html (7,484 bytes)
115. [AMPS] apology (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Sun, 20 Feb 2000 09:55:05 -0800; I'd much prefer it if technical matters were argued on technical grounds. If someone disagrees with me then I want to discuss the science, not their personality or whether they have changed their vi; /archives//html/Amps/2000-02/msg00389.html (8,445 bytes)
116. [AMPS] apology (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Mon, 21 Feb 2000 10:41:40 -0800; Indeed, although I can be a boring old stiff except when I'm propping up a bar :-) Of course, but I don't want to automatically dump messages on the basis of author or topic, because that would somet; /archives//html/Amps/2000-02/msg00410.html (8,093 bytes)
117. [AMPS] Diodes (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Mon, 21 Feb 2000 10:46:27 -0800; While searching for a part for work, I worked through the rectifiers section of the Farnell (Premier) catalogue. Philips, in particular seem to have quite a range of 4-8A diodes with 1kV+ rating, at; /archives//html/Amps/2000-02/msg00411.html (8,176 bytes)
118. [AMPS] fil info (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Thu, 24 Feb 2000 10:13:09 -0800; At that price, I hope you'd get a decent bang :-) Steve -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Pr; /archives//html/Amps/2000-02/msg00542.html (6,958 bytes)
119. [AMPS] Audio amp power (score: 1): Author: Steve Thompson" <rfamps@ic24.net (Steve Thompson); Date: Tue, 18 Jan 2000 09:00:45 -0000; I have made cuts in the original. --Original Message-- From: Dave D'Epagnier <DAVED@ctilidar.com> To: QRO list <amps@contesting.com>; 'John Nelson' <John_Nelson@compuserve.com> To: <amps@contesting.c; /archives//html/Amps/2000-01/msg00389.html (8,315 bytes)

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