[Elecraft] K3 P3 Spurious signals

[Fred Jensen]

K3 [#642] w/P3 in FixTune mode [cursor moves, ends of screen are fixed]. 
  K3 has the resistor mod to increase the 8 MHz IF output.  I see them 
on CW, I haven't tried SSB.

I've got a pair of weak, steady spurious signals ~14.5 KHz above and 
below the VFO A cursor.  They tune with the VFO [i.e. I can never tune 
to them]  With a noise floor around -135dBm, they run about -115 dBm.  I 
see them only on 10m, however my noise floor is in the -120 to -115dBm 
range on other bands and they may be there and I just can't see them.

With no antenna, the signals appear to be each bracketed by two very 
weak bands of noise about 2 KHz wide, about 3 KHz above and below each 
signal.  They only show up on the waterfall [I use a monochrome WF].

The K3 and P3 appear to be working just fine and I only notice them 
because when I tune VFO A, I end up with faint slanting traces on the 
WF.  Anyone have an explanation?

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2013 Cal QSO Party 5-6 Oct 2013
- www.cqp.org