[Elecraft] K3 Problem, VFO Noise While Rotating On 10 Meters

[Randy]

When I tune the VFO knob on 10 meters I hear a scratching type noise.  This problem only occurs on 10.

There was an Elecraft mod that addressed this issue for early serial number K3's but my K3 is a later  unit with the mod built in at the factory during production. Can anyone shed some light on this issue?  I assume that this is not normal operation. 73 Randy