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RE: "Low frequency ringing"...

It may not be possible to use small caps. at the I/Ps of the "finals", due to grid to ground resistance limits. This is especially true, when "fixed" bias is employed.

As for blocking, I recall reading where 1 fellow was going to implement "PowerDrive" using ZVN0545As, even though positive grid current was not permitted. A rather high valued grid stopper prevented significant g1 current from flowing.


Eli D.


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