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RE: Ping Tre: " 12K driving 300b would be just fine" question.

Posted by Triode_Kingdom (A) on May 24, 2015 at 11:08:11

In Reply to: RE: Ping Tre: " 12K driving 300b would be just fine" question. posted by Tre' on May 23, 2015 at 11:39:54:

"66pf would have a reactance at 200kHz of 12k ohms. If you were swinging the grid 140 volts peak that would take 11.7ma of current. "

I don't think he will need to drive the grid at 200kHz, but if he does, peak current will be approximately 8mA due to power factor. More important, peak current at 20kHz - the highest frequency likely to be reproduced - will only be a little more than 1mA. That's the value he has to budget for when designing the driver.

Edits: 05/24/15 05/24/15

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