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21. [AMPS] G2DAF (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Thu, 15 Jul 1999 21:54:09 +0200; -- To: <amps@contesting.com> output impedance or a very high one, depending on the configuration of the circuit". John ZS5JF -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@con; /archives//html/Amps/1999-07/msg00307.html (9,672 bytes)
22. [AMPS] G2DAF (score: 1): Author: measures@vc.net (Rich Measures); Date: Thu, 15 Jul 1999 14:18:39 -0700; ? Can you name two eminent engineers who agree with Mr. Rauch on his contention that AC Circuit Analysis does not apply in determining current division in a L/R VHF parasite suppressor? . ? nor do I; /archives//html/Amps/1999-07/msg00308.html (9,358 bytes)
23. [AMPS] G2DAF (score: 1): Author: measures@vc.net (Rich Measures); Date: Thu, 15 Jul 1999 16:17:45 -0700; ? I am not trying to use Thevenin's. I am using the max power transfer theorem, which essentially states that when half of the total P is being dissipated in the generator, transfer of P to the load; /archives//html/Amps/1999-07/msg00310.html (14,492 bytes)
24. [AMPS] G2DAF (score: 1): Author: measures@vc.net (Rich Measures); Date: Thu, 15 Jul 1999 16:17:50 -0700; To: <amps@contesting.com> amplifiers a of the ? ¿? Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@co; /archives//html/Amps/1999-07/msg00311.html (8,911 bytes)
25. [AMPS] G2DAF (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 15 Jul 1999 19:16:47 -0400; Hi Peter, A little circuit analysis never hurts anyone who is correct. That's almost any conversation on this reflector. Or haven't you noticed? <grin> In any event, what you prefer to call the imped; /archives//html/Amps/1999-07/msg00312.html (10,995 bytes)
26. [AMPS] G2DAF (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 15 Jul 1999 22:06:01 -0400; Nowhere in the maximum power transfer theorem does it consider source efficiency. The maximum power transfer theorem simply gives two conclusions: 1.) When the magnitude and angle of an impedance co; /archives//html/Amps/1999-07/msg00314.html (17,054 bytes)
27. [AMPS] G2DAF (score: 1): Author: measures@vc.net (Rich Measures); Date: Thu, 15 Jul 1999 20:28:58 -0700; ? With half of the total P being dissipated in the generator, and half of the power being delivered to the load R, the efficiency is obviously 50%. ? Say what? ? ¿? ? I agree that large stati; /archives//html/Amps/1999-07/msg00318.html (13,393 bytes)
28. [AMPS] G2DAF (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 16 Jul 1999 09:37:14 -0400; The coal consumption in this country just went up twenty fold, as power companies have had to increase BTU's to supply the energy used to heat the generators and line distribution transformers now t; /archives//html/Amps/1999-07/msg00321.html (8,570 bytes)
29. [AMPS] G2DAF (score: 1): Author: measures@vc.net (Rich Measures); Date: Fri, 16 Jul 1999 09:03:59 -0700; ? In a debate, not reading before replying is a mistake. - Cheers, Tom. Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submis; /archives//html/Amps/1999-07/msg00325.html (8,171 bytes)
30. [AMPS] G2DAF (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 2 Nov 1998 13:42:37 -0000; In all probability. But put in something modulated at syllabic rate and that's another matter. Tom Rauch, W8JI, is a strong advocate of 3 tone testing to pick this sort of thing up. 73 Peter G3RZP --; /archives//html/Amps/1998-11/msg00038.html (7,654 bytes)
31. [AMPS] G2DAF (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 2 Nov 1998 09:28:26 -0800; Three-tone is good for testing distortion in conventional amplifiers, however, if the screen voltage remains constant during the three-tone test in a G2DAF amp. (which seems likely) it would not pic; /archives//html/Amps/1998-11/msg00043.html (8,101 bytes)
32. [AMPS] G2DAF (score: 1): Author: w3am@juno.com (w3am@juno.com); Date: Mon, 2 Nov 1998 13:01:22 -0700; Why not use a storage spectrum analyzer to look at occupied bandwidth and IM over a significant time period while modulating with speech or pulsed white noise? Wouldn't that be a better worst-case te; /archives//html/Amps/1998-11/msg00046.html (9,719 bytes)
33. [AMPS] G2DAF (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 2 Nov 1998 14:24:22 -0800; RE: pulsed noise: Only if the pulses are spaced far enough apart to cause the screen potential to decay to near zero volts between pulses. RE: speech modulation: I have listened with stereo headphon; /archives//html/Amps/1998-11/msg00048.html (7,962 bytes)
34. [AMPS] G2DAF (score: 1): Author: w3am@juno.com (w3am@juno.com); Date: Mon, 2 Nov 1998 18:32:19 -0700; Implied in my question, but not expressed, sorry. Broadcasters sometimes use pulsed noise as a substitute test signal for "program audio". It's handy for occupied BW and other measurements. The puls; /archives//html/Amps/1998-11/msg00049.html (9,610 bytes)
35. [AMPS] G2DAF (score: 1): Author: w8ik@ibm.net (Joe Subich, W8IK); Date: Mon, 2 Nov 1998 22:39:23 -0500; However, if the three tone test is PROPERLY designed (with two of the tones very close together) the screen voltage will vary at a semi-sylabic rate and produce the wide variations in screen potenti; /archives//html/Amps/1998-11/msg00051.html (7,958 bytes)
36. [AMPS] G2DAF (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 3 Nov 1998 03:53:57 -0800; yes. The exception is the supercathode circuit where the grid is "disconnected" by connecting it to the cathode. This causes the (grounded) screen to act like a control grid when the cathode is driv; /archives//html/Amps/1998-11/msg00053.html (10,210 bytes)
37. [AMPS] G2DAF (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 3 Nov 1998 07:56:33 +0000; The problem with any two or three fixed tones is that the test signal doesn't explore all possible weaknesses of the power supplies. Although it's an improvement to add a third, lower tone which modu; /archives//html/Amps/1998-11/msg00054.html (10,234 bytes)
38. [AMPS] G2DAF (score: 1): Author: Ilkka.Kontola@nmp.nokia.com (Kontola Ilkka NMP); Date: Tue, 03 Nov 1998 16:59:16 +0200; If there ever will be a voting for a "standard speech" test for amplifier IMD, I would vote for one single word; the name of a certain village in UK: Llanfairpwllgwyngyllgogerychwyrndrobwllllantysili; /archives//html/Amps/1998-11/msg00055.html (9,243 bytes)
39. [AMPS] G2DAF (score: 1): Author: lars.harlin@pocab.se (Lars Harlin); Date: Sun, 14 Dec 1997 17:55:01 +0100; It seems like end of discussion on this subject....No answer from Bob and nothing at all from W8JI. Unfortunatley for me, as I was hoping to learn something new... The only conclusion I can come to i; /archives//html/Amps/1997-12/msg00286.html (7,379 bytes)
40. [AMPS] G2DAF (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 15 Dec 97 02:57:53 -0800; A mystery to me. There is not much new under the Sun concerning grid driven tetrode SSB amplifiers. The grid current region is not the linear region, use plenty of anode volts, place the termination; /archives//html/Amps/1997-12/msg00295.html (7,128 bytes)

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