On Thu, 17 Sep 2009 01:47:37 -0400 Sean Breheny wrote: > Perhaps this is a crystal which is cut differently than the HF ones? > For example, the 32.768kHz watch crystals. I read somewhere that 32 kHz xtals cut in tuning fork format to lower the frequency (and the power needs). I do have a couple of real old 100 kHz 'stones' here, but they are so large you could probably build the watch inside them ;-) John -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist