[Amps] 4xc250b Valve Bases - Screen ring capacity - HF v VHF

[Ken G3WCS]

Hello all,

I have a couple of 3rd party bases for 4cx250 valve bases but am unsure 
if they are designed for HF or VHF operation. I know that the capacity 
of the inbuilt screen grid capacitor was different between HF and VHF 
bases. I could check this (roughly) with the capacity function of my DVM.

Can anyone point me to the approximate capacity I should see for HF and 
VHF bases?

Thank you and 73,


Ken.
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Ken G3WCS
IO83rh : Cheshire : NW England
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