JT Croteau wrote: > Anyone know if the frequency counter mode of the MFJ-259B is accurate > enough to do the 4 MHz Oscillator Calibration of the K2? No. Use the N6KR method, described on the Elecraft Website. <http://www.elecraft.com/Apps/K2%20C22%20Adjust%20App%20Note.pdf> -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco