[Elecraft] Re: Help with Birdie (not "tweet tweet!")

[Ron D'Eau Claire]

Good points Mike, but my K2 does NOT have the birdie Dave is hearing...

BUT, Dave K2 S/N > 3000. Mine is a pre S/N 3000 and I believe the others
replying were too. So it is slightly possible that there was something =
in
the changes to the RF board that have allowed a birdie to become audible
that wasn't in the earlier units...=20

Also, Dave reports being able to get frequency changes tapping almost
anywhere in the general area of the PLL Reference Oscillator. I can only =
get
slight changes by touching the frequency-sensitive components =
themselves,
and that only a slight shift in the frequency.=20

Ron AC7AC
K2 # 1289

-----Original Message-----
I think we're going off on the wrong route here.  It's nothing to do =
with
bad joints, wobbly components, instability and all.  Bashing a frequency
determining components around the VCO is bound to change the frequency, =
that
isn't necessarily the issue.  Squeezing the case causes the BFO to move.

Birdies are a consequence of the necessary mixing required to convert =
the RF
to audio....
Mike VP8NO