[Johnson] Johnson 154-2-5 variable capacitor

[Jim Brannigan]

If no one has specific information you can do this:
Parallel a known inductance with the capacitor.
With a grid-dip meter, measure the resonant frequency at MAX and MIN.
capacitance.
The Handbook has the formulas for deriving the capacitance from the known
frequency and inductance.

Measure the distance between any two plates (rotor and stator) refer to the
Handbook for the max breakdown voltage for an air insulated capacitor.

Jim


> I have a Johnson 154-2-5 variable capacitor. Looked on the Cardwell web
> site and the closest I could come was a 154-2-1.
>
> Anyone have specifics on the 154-2-5? Peak withstanding voltage, max and
> min capacitance, air gap?
>
> Thanks.
>
> Steve K8JQ