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In Reply to: RE: help with Grid Choke selection posted by awsjr on September 07, 2016 at 04:19:09
This circuit is not much mine, I just adapted an existing circuit to use MQ products in a parafeed output. The pentode driver output impedance is very high relative to a more usual triode driver, being dominated by the 91K plate resistor. This makes it very susceptible to leakage capacitance in a grid choke, potentially limiting the high frequencies. Maybe Mike knows how much capacitance there is?
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by memory the JR version is approx 15 puffs and the senior version approx 25 puffs
MSL
Builder of MagneQuest & Peerless transformers since 1989
OK, that's much less that the 300B's Miller capacitance so it's not an issue. Full steam ahead!
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