If you have a Paragon II and feel that the Fade - BP audio is broad and
ineffective, check the following value on the IF/AF board. This board is
located on the bottom/front RH side. You must remove the bottom shield of
course.
R65 should be a 33k according to the schematic. Mine was a 3.3K. This incorrect
value prevented the first stage of the filter from resonating near the desired
frequency while the second stage worked fine, since it had the correct value,
33k.
Have you noticed how the audio gain seems to decrease when turning up the fade
control, even at resonance? Change R64 from 33k to 10k. This will equalize the
gain when the filter is engaged.
Once the filter is working properly, it becomes a wonderful too for improving
CW copy.
73
Steve N4LQ
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