[Elecraft] P3 - spikes that never move

[Howard Hoyt]

I too have spurs displayed on my P3.  The spurious signals interfering 
with the usability of the P3 are at ~ -1, -2, -3 and -4 KHz below the 
tuned center frequency on 160M-10M at S1, S3, S2, and S1 respectively, 
although more are present lower in frequency at 1KHz spacing at 
progressively lower amplitudes.  On 6M they flip to the +1, +2, +3 and 
+4 KHz side.  The spurs are spaced at exact 1KHz intervals, although 
their relationship to the center tuned frequency changes depending on mode.

After some experimentation I believe they are actually contained in the 
IF signal coming from the K3.  If I disconnect the IF cable, the display 
is dark, but of course if it is a mixing product in the P3 that would be 
the case as well.  I have replaced the IF cable leading from the K3 to 
the P3, no change.  I also followed Elecraft's advice and pinned the 
ribbon cable in the P3 to the left side of the case, no change.

I have corresponded with Elecraft about this problem, and although they 
responded promptly they had no resolution to the problem.  The P3 has 
become the front panel of the K-line to me, being an op who mainly 
chases DX and contests, I spend much of my time staring at the P3, 
looking for new signals on a band to S&P on.

I would love a resolution to this issue, I'm sorry to see that others 
have it as well, but maybe this will raise the perceived severity of the 
issue to the point where Elecraft can afford to allocate engineering 
time to it?

Hopeful in Chapel Hill,

Howie - WA4PSC