Al,
The dynamic balance between the base and emitter of Q12 determine the
AGC Fast/Slow response. The dynamic characteristics of Q12 as well as
R2, C4, RP6 and C1 all come into play.
Remember when doing the analysis that the voltage at /SLOW AGC is at 5
volts for fast AGC. When you consider
I'm looking at the K2 schematic at the components on the Control Board that set
the AGC time constant, and I can't understand how the fast setting gets its
time constant... the parts involved, C4 and R2, appear to have a very long
time, much longer than necessary for the FST settting.
If you
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