Wednesday, February 27, 2019

AF Amp with gain control

I put a coil. V-cap and diode feeding the amp and found the volume to high. I added a gain control.R15 is a 2K rheostat. It could be placed in  Q4 collector circuit. This would limit  the low end.
With the rheostat in Q4 circuit it swings the output from 2 mv to 18mv.

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