>>When the plate blocking cap fails, this puts the HV across the antenna
>>terminal. The purpose of the safety RF choke is to trip the primary CB's or
>fuses to
>>remove the HV from there WITHOUT destroying itself. If it is not robust enough
>>to take the "hit" and fails open, the lethal HV is STILL on your
>>antenna!
>>(Not good!)
>>
>With an ordinary Load C, this is not going to happen.
I guess the load C's in my amps are in the extrordinary catagory.
They are 1000 pf 5kv vacuum variables. No arcing with full HV
applied, much less a smaller voltage from a leaky C/block.
The safety RF choke in my amps does two things; it protects
more expensive components from carbon build-up an damage,
and it keeps me from being published in QST in the "Silent Keys"
column!
Cheers, Rich...
(((73)))
Phil, K5PC
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