[Elecraft] Problem With VCO Stablity

[Dave & Jeanne Robertson]

When I operate my K2 between 7180 and 7190 Khz the VCO seems to worble or 
becomes unstable. Any other band or frequency is fine. I have removed RFC15 
and replaced it with a direct wire connection then later a ferrite bead. 
C91's value was increased from .001 uf to .01 uf. c*88 is still  68pf but 
with the advice of Elecraft Technical support I reduced the lead length of 
this component to as short as possable.  These changes seem to help reduce 
the bandwidth of instablity but not totally eliminate it.

The rig works fine on all bands and puts out 10+ watts.
Any suggestions

73
Dave KD1NA