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21. [AMPS] Screen regulator circuit needed (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 17 Nov 1998 23:25:56 -0800; However, one need not use the same obviously-flaky zeners that GW4FRX used . I use a zener-string (400v total) shunt regulator for the screens of the pair of 4cx250Rs in my 2m 1kW pep out SSB amplif; /archives//html/Amps/1998-11/msg00250.html (11,070 bytes)
22. [AMPS] Screen regulator circuit needed (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 17 Nov 1998 23:25:55 -0800; With a shunt zener-string regulator, one does not sense excessive screen current. The value of the series resistor from the screen/zener-string to the anode supply is selected so as to limit screen; /archives//html/Amps/1998-11/msg00251.html (11,436 bytes)
23. [AMPS] Screen regulator circuit needed (score: 1): Author: John_Nelson@compuserve.com (John Nelson); Date: Wed, 18 Nov 1998 15:40:58 -0500; Message text written by Rich Measures . < For the record, the Zeners used to derive the comparison data illustrated on Ian's web site were nine 20W Philips/Mullard BZY93C39 purchased specifically for; /archives//html/Amps/1998-11/msg00254.html (9,418 bytes)
24. [AMPS] Screen regulator circuit needed (score: 1): Author: measures@vc.net (Rich Measures); Date: Wed, 18 Nov 1998 13:10:21 -0800; Was not the IMD degraded by the shunt zener regulator? What was the measured fluctuation in screen potential from zero signal to max. signal with the zener shunt regulator? - thanks - cheers, John R; /archives//html/Amps/1998-11/msg00255.html (9,571 bytes)
25. [AMPS] Screen regulator circuit needed (score: 1): Author: John_Nelson@compuserve.com (John Nelson); Date: Wed, 18 Nov 1998 18:48:51 -0500; Message text written by Rich Measures The IMD performance with the Zener chain was consistently worse than the IMD performance with the active regulator. But how is that relevant to your assertion th; /archives//html/Amps/1998-11/msg00263.html (9,781 bytes)
26. [AMPS] Screen regulator circuit needed (score: 1): Author: measures@vc.net (Rich Measures); Date: Wed, 18 Nov 1998 19:31:15 -0800; 0.8v change with a 4mA change in load current indicates that the dynamic Z is c. 200-ohms?. I test IMD with speech by measuring the relative signal level in the windows. 3.6kHz above and below the f; /archives//html/Amps/1998-11/msg00265.html (10,036 bytes)
27. [AMPS] Screen regulator circuit needed (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Thu, 19 Nov 1998 00:13:55 EST; Hello everyone! I designed a circuit circa 1986 for a screen regulator that has some features which may be of interest in this current discussion. It was designed for a 4CX1500B which operates at sub; /archives//html/Amps/1998-11/msg00268.html (10,172 bytes)
28. [AMPS] Screen regulator circuit needed (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Thu, 19 Nov 1998 09:49:01 +0000; ... For the record, the URL is: http://www.ifwtech.demon.co.uk/g3sek/cleansig/imd1.htm Most of the details you're asking John for are there, Rich. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In; /archives//html/Amps/1998-11/msg00274.html (9,292 bytes)
29. [AMPS] Screen regulator circuit needed (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Thu, 19 Nov 1998 09:20:36 -0500; John, Ian, etc. Interesting to note that Zener part #. Is there a list available somewhere that gives data on various EU and Asian Zeners? I can only find some very spotty info ( Toshiba) and almost; /archives//html/Amps/1998-11/msg00279.html (9,727 bytes)
30. [AMPS] Screen regulator circuit needed (score: 1): Author: measures@vc.net (Rich Measures); Date: Thu, 19 Nov 1998 08:07:31 -0800; tnx, Ian Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUES; /archives//html/Amps/1998-11/msg00281.html (8,380 bytes)

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