[Elecraft] Heil Proset & K3 Audio fixed, sort of.

[Paul Christensen]

> The amplitude appears fairly consistent. I think a simple low pass filter 
> is
> all that is needed and a cut off of maybe 7 kHz would be appropriate. 
> Maybe
> even lower as this 4kHz ESSB plot with the FM filter shows, the audio
> response is limited above 2.5kHz.

Mike:

You may want to revisit that last measurement.  My measured data closely 
mirrors that shown on N1EU's website with the 6 kHz filter engaged:

http://n1eu.com/K3/K3_notes.htm

See chart entitled " Elecraft K3 SSB Receive Passband..."

Paul, W9AC