VK Music - Elekit & Triode Japan Forum

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RE: Tu-879s & Tu-875 - Input caps

Posted by vkung on November 2, 2011 at 11:48:40:
Capacitor C1 or C2 is the input coupling capacitor. It is used to isolate the grid circuit from the DC voltage at the output of the previous circuit. This capacitor, in conjunction with the grid resistor (R1, R2), controls the frequency response of the stage.
Please read this thread http://www.aikenamps.com/CommonCathode.htm