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In the Forum: Melquiades Amplifier
In the Thread: Driver tubes, grid leak biasing, and fidelity
Post Subject: Re: My very different objectivesPosted by deemon on: 2/22/2006
Grid leak bias is not reliable itself . Grid current is very low and grid resistor is very big , the circuit become very sensitive to all destabilizing factors - capacitor leak , humidity , temperature . And when we apply a big input signal to the tube - average grid leak current can change too , it will recharge input capacitor and change operation point of the tube , so I don't like this bias method ...
Dima
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