[Elecraft] [K3] Display frequency accuracy on 6 meters

[Bill W5WVO]

I work 6-meter WSJT digital modes, where frequency differences measured in Hz are significant. Working with various other stations whose technical capabilities I trust more then my own, I've concluded that my K3 is about 96 Hz, plus or minus, on the low side of actual when the VFO is set to a kHz integer frequency on 6 meters. (E.g: display frequency 50260.000, actual frequency 50259.904.) I would like to tweak this in to a higher degree of accuracy. Since I didn't put together my own K3, I'm not at all sure how to do this. Can someone knowledgeable point me in the right direction? If test equipment is needed, let me know what it is.

Bill W5WVO