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RE: biasing setup on Scott 222D question

Posted by Michael Samra (D) on March 19, 2017 at 11:28:33

In Reply to: biasing setup on Scott 222D question posted by gkargreen on March 18, 2017 at 18:07:37:

Randy
Just put a 10 ohm resistor to ground on each cathode.Then,you simply adjust for 0vdc between each pair of tube's cathodes with the DC balance pot.Then you adjust your bias to the current you want.I think the 7189s are 28ma to 30ma depending on your B+.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken

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