I tried the one-sec routine that was recommended by Roman. It is working better than my old code, but I still come up short, over 6 hours I accumulated almost 20 seconds of loss. (assuming it hadn't completely lost over a minute) Frankly the spec sheet for my resonator left me saying "I hope this is right". I installed it with the center pin going to ground. I don't have a freq. counter to test it with (next project maybe). Is it common to have to 'fudge it' a little to get it right? Thanks -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu