[Elecraft] K3 firmware issue - VFO tuning

[Bruce Meier]

I have noticed something strange happening with both of my K3s that I think
is a firmware issue.  I can reproduce it on both K3s.  Currently I am
running v2.16 in both but I have tried v2.20 and the problem is still
reproducible.   NOTE:  It is reproducible, but not  100% of the time.  

Problem:  In CW mode - push COARSE tuning - find a signal - push COARSE
again to go back to NORMAL tuning.   After doing this the VFO is no longer
linear.  By that I mean the tone jumps a few HZ as if it is jumping in some
predetermined step of HZ.   It doesn't jump off the signal but it does jump.

FIX:   If I then push FINE (don't need to  tune the VFO) and immediately go
back to NORMAL the VFO tunes normally.  Smooth tone changes and the step
freq jumps are gone.

I can create this on both of my K3s.   

K3 # 1062
K3 #1193

Config settings:

VFO CRS: 10
VFO CTS: 100
VFO FST: 50

Has anyone else seen this?   I don't remember it being reported and I would
expect it would have.

73,
Bruce - N1LN
(aka: NC4KW)