[Elecraft] Systematic error in spots as heard by K3

[Pete Smith N4ZR]

My K3 is set up to zero-beat at 520 Hz, and its calibration has been 
checked against WWV and adjusted to with 2 Hz.  That said, I'm surprised 
when operating assisted to note that most spotted stations, when clicked 
on, sound significantly higher in pitch than my sidetone.  It seems 
logical, given that the cluster network rounds up or down to the nearest 
0.1 KHz, that spotted signals should be about evenly distributed  (half 
higher than my sidetone, half lower).  But that's not the case.

Any suggestions?

-- 
73, Pete N4ZR
Check out the new Reverse Beacon Network
web server at <https://reversebeacon.net>.
For spots, please use your favorite
"retail" DX cluster.