Folks, Wonder if I should leave well enough alone? Today I switched on my K2 and while it was "cold" I zero beat WWV, the display read 10,000.02. I left the rig on, and four hours later zero beat WWV again. The dial read 10,000.06. I didn't measure BFO drift, frankly I'm not sure how to measure it. Ideas? 73, Rod N0RC