[Amps] pi network stray dogs

[John Irwin]

Dudes
 
Is there a rule of the thumb for guessing on the pi network stray capacitance?   Plate to cathode capacitance one can get from tube data tables.  Input pi capacitor minimum one can get from capacitor data sheet or measure on a z meter.  One can not measure strays as the unit is yet to be on paper.   
 
What makes up this stray capacitance ?  How do you get more,or less of it?
 
john kb9tc


		
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