[Amps] Measurement of C1 (=C+ strays) in amp PI filter circuit ...

[BEHIELS JEAN-PIERRE]

Hi;

Question : Optimizing the minimum capacitance of the input of a PI filter circuit including available stray capacicitys.

I have to now what the minimum capacitance is,of the input circuit of a homebrewed amplifier PI-filter system.
Can I measure this value with the vacuum capacitor already mounted and connected on his place into the input of a PI-circuit.
Meaning is to now what my obtained minimum capacity is of my builded PI-filter inclusif the obtained strays in the RF case.
It is even possible that I can not reach the PI-filter calculated minimum C values from the PI tables for the 28 Mhz band !!!!
Maby my strays togehter with the minimum value of my input vacuum C is to high to obtain resonance at higher bands ?
   
I look forward es 73's Jean ON4AEF.