[AMRadio] Biasing a Class C modulated final


Paul Baldock paul at paulbaldock.com
Tue Feb 17 13:56:06 EST 2015


I am building a 2x813 class C final modulated by 2x813.

The typical way to bias the class C final is with a combination of 
fixed bias applied to the control grid and bias derived from the rf 
drive through a grid resistor.

Rather than fixed bias applied to the grid it seems that I could 
achieve the same effect by using a pseudo zener in series with the 
cathode, similar to what is used in cathode driven linears.

Any thoughts on this approach?

- Paul KW7Y


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