[Amps] cathode to ground in tetrode amp

Steve Thompson g8gsq at eltac.co.uk
Tue Jan 31 02:34:15 EST 2006



Will Matney wrote:
> What I looked at in the schematic didn't make one lick of sense to put a cathode choke to ground on a grid driven amp, then place a shunt resistor across the choke 

Assume that the resistor is a typo and it's meant to be 30R, not 30k - a 
reasonable value to give some rf nfb. The choke across it allows the dc 
and rf conditions to be controlled separately, without interaction.

Steve


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