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1. [AMPS] 3-500Z grid to filament resistance? (score: 1): Author: charlie.ocker@tellabs.com (Charlie Ocker); Date: Thu, 27 Apr 2000 15:58:04 -0500; Greetings, I suspect that one or both of the 3-500z's in my SB-220 (original Eimac bottles, date code 1977!) may have a grid to filament short. I've measured about 11 Kohms with my DVOM while the tub; /archives//html/Amps/2000-04/msg00174.html (7,302 bytes)
2. [AMPS] 3-500Z grid to filament resistance? (score: 1): Author: 2@vc.net (measures); Date: Thu, 27 Apr 2000 18:32:07 -0700; The resistance depends on the grid-fil. potential. At approx 8000v, roughly 2uA will flow in a new tube. cheers, Charlie - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://ww; /archives//html/Amps/2000-04/msg00175.html (7,483 bytes)
3. [AMPS] 3-500Z grid to filament resistance? (score: 1): Author: mike@g0mjw.freeserve.co.uk (G0MJW); Date: Fri, 28 Apr 2000 08:46:38 +0100; It should be very high - with the valve "cold". With the valve warm, it will presumably be just like a diode and the resistance you measure will depend on the polarity. However, 11k is high enough a; /archives//html/Amps/2000-04/msg00177.html (7,809 bytes)

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