Rich,
If the tank is resonated with too-light loading, the 'loaded' Q of the circuit
will be much higher and so will the voltage. This can happen due to an
inexperienced operator or antenna switching mistake, etc. I think the
bandswitch doesn't have a great enough margin of safety.
73,
Vic, K2VCO
Fresno CA
Rich Measures wrote:
> ? The bandswitches used in the AL-80, SB-220 and SB-1000 are similar and
> have a measured breakdown potential of over 5500v. The actual tank piv
> in these amplifiers is around 3000v when the tank is tuned to resonance
> and loaded for max. P out. When the tank is tuned out of resonance, less
> peak V appears across the bandswitch and Tune C. // Photographs of
> arced AL-80 and AL-82 bandswitches may be seen on my Web site.
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