[Amps] tube C + stray C

[Vic K2VCO]

Scott Townley wrote:
> 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.

Sure.  The chassis has plenty of area, and the plate's not that far from it.
-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco