I don't know if this is of any value in this case, but a friend of mine once told me about picking up the oscillator in his watch with a coil and feeding it into a receiver. He was then able to beat the watch frequency against a standard and adjust the watch's oscillator to "zero beat". He knew what the frequency was supposed to be but I've forgotten. He claims it was quite accurate after that but not like having a cesium beam strapped to his back.
Burt, K6OQK At 06:48 AM 12/1/2007, you wrote: >Subject: [time-nuts] Frequency trimming of Seiko wristwatches >To: [email protected] >Message-ID: <[EMAIL PROTECTED]> >Content-Type: text/plain; charset=ISO-8859-1; format=flowed > >Max Robinson wished for a way to open up wrist-watches >and adjust the crystal trimmer. > >I have owned at least two Seiko wrist watches which >had a simple to open screw-on back. I opened the back >and tweaked the trimmer capacitor on both of them using >the ticks from WWV as a reference. After watching for >a month to see which way the drift was, I re-tweaked >several times. Ultimately, the best I could achieve >was around +/- a few seconds per month. The problem appeared >to be one of temperature compensation-- seconds gained >or lost per month were different in the winter months >as opposed to the summer months. These particular Seiko >wristwatches had a tiny o-ring to seal them against >moisture and I had no problems with leakage. > >Mike Baker >Micanopy, FL USA >--------------------------- Burt I. Weiner Associates Broadcast Technical Services Glendale, California U.S.A. [EMAIL PROTECTED] K6OQK _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
