Jerry, you said "That variation is due to how the BFO lands on the edge of the crystal filter, so different rigs wind up with different drive levels into the IRF510."?
Is this a little bit more about what Peter was saying about "the relationship between the BFO crystal and the crystal filter bandpass"? I am just starting thinking about this stuff, and so far it seems necessary to have a trim cap at C103 to adjust for best audio power and quality. And now something similar for CW BFO frequency. Would this help Allard with his efforts on CW??
Here is the link to Peter's post on the subject of "Improved Audio Hack. ?
/g/BITX20/message/27222
