> grid rises to supply voltage or near supply voltage (that is the
> ONLY way the grid resistor or choke would limit fault current) then
> there is no protection back to the cathode to prevent the cathode
> from rising to supply voltage.
It happens if catode becomes floating, but generally it does not.
Transceivers, IP shunt resistor (and meter) and bias zener where never
replaced after grid coil opened in the SB220 and TL 922 we repaired.
73,
Mauri I4JMY
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