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Original Message
RE: grid resistors first stage of amp
Posted by Tre' on June 26, 2012 at 17:17:39:
"The input [Miller] capacitance of the tube, in conjunction with the SOURCE IMPEDANCE of the previous stage, forms a simple, single-pole RC lowpass filter with a -6dB/octave (-20dB/decade) slope, and an upper -3dB cutoff frequency equal to: f = 1/(2*pi*R*C)"
Tre'