Re: Adding speech compression.

Jerry Gaffke

Should work as expected if you increase the gain of the microphone amp:

Assume you raise the signal coming out of the microphone amp by 3dB (double the power).  Assume the diodes conduct pretty severely on any voice peaks, and reduce them by a factor of 2, so your peak power into the crystal filter is back down to where you started out.  But the quieter parts of your voice (for those of us that have any) have not been clipped back, and remain at twice the power.  

On Sat, Apr 8, 2017 at 11:14 am, John Smith wrote:

I showed the schematic from Allard to someone, and he said the two diodes are shorting the AC signal to ground, and would result in a lower quieter signal.


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