This is sheer folly, because they are completely overlooking the very low impedance base-emitter junction that is effectively in parallel with the 470k resistor.
As far as I remember it is the base-emitter junction plus the emitter resistance multiplied by ß (hfe) of the transistor what is in parallel to the 510k (470k) base resistor
I'll tell ya what has good non-TB....the SansAmpClassic, excellent bypass on that! And to be honest, i cant hear much, if any difference
Maybe so - but it is going to be different in each half of the cycle and still way too low in impedance
bajaman wrote:I'll tell ya what has good non-TB....the SansAmpClassic, excellent bypass on that! And to be honest, i cant hear much, if any difference
Like I said - buffered bypass with a 2SK117 N channel Jfet - very nice transparent device.
bajaman
bajaman wrote: - Tech 21 use a 2SK 117 as an input buffer in their Classic Sans Amp pedal
Maybe so - but it is going to be different in each half of the cycle and still way too low in impedance
Sorry for the confusion
The formula for the input-impedance of the transistor is:
Ri = ß x (Re + RE)
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