[Amps] SB-220 Plate Tuning Capacitor

[Peter Chadwick]

Rich said:
>The measured breakdown potential of a SB-220 bandswitch is c. 4900v  
at sea-level.  At 390v peak output into 50-ohms, the actual potential  
across open bandswitch contacts is c. 2600v-pk.<
And what is the manufacturer's rating?
For some reason I don't understand, things seem to break down more readily with RF than with DC.

73
Peter G3RZP