[Amps] tube C + stray C

[Scott Townley <nx7u@arrl.net>]

Measured with a simple B&K capacitance meter (1kHz):
3-500Z grid to plate    5.0pF
3-500Z inserted into Johnson ceramic socket, recessed about 3/4" below 
aluminum chassis deck:  10pF
Seem right?  Kinda surprised that an extra 5pF just from sticking it in the 
socket...socket grid pins (all 3) are directly grounded to chassis.


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