[Elecraft] RE: K2DSP puzzle

[Lyle Johnson]

Hello Brendan!

> Any ideas for a mod to fix this?
> Slowing down the onset of the mute circuit slightly should do it but I am
> not sure how best to go about this.

All the muting is handled externally to the KDSP2.  It has its own muting,
but that is currently only invoked during during power up, to elimninate a
loud POP that would otherwise leave your ears ringing for a while!

Signals do take a while longer to propagate through the KDSP2. The sidetone
is injected after the KDSP2.  Adding delay to the unmute function would
probably slow down the K2's top speed for effective QSK, but that may be a
trade-off you're willing to accept to get around the problem you cite.

Since I don't personally operate QSK CW, I am not the right person to work
out a mod to get around the problem.  WHat sounds right to me might not
sound right to you, and I have no real frame of reference as to what it
*should* sound like.

In any event, to slow down the unmute process, increasing the value of C23
on the control board would probably be the most direct route.

73,

Lyle KK7P