[Collins] 32S-3 1st Audio Amp

[HPMeyer]

Am working on a 32S-3 that was purchased in June of 1964.
Have three different schematic versions with variations on the
1st Audio Amp.  The unit itself has a 0.1 ufd input cap with a=20
100 Kohm grid resistor and no cathode resistor.  One of the=20
schematic variants has an un-bypassed 680 cathode resistor=20
and the other has a 680 ohm bypassed with a 0.1 ufd cap. =20
I understand the theory of cathode bypass resistors and caps,
but would like to know the reasoning for the different circuits=20
and which is the best for overall performance.  Started looking
at this because my Mic gain setting (using an EV664) is about=20
in the 8 o'clock position and it just seemed like there may be a=20
problem with too much audio gain somewhere.
Thanks...Herm Meyer...KC2DFJ


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