> All seems to make above 3 MHz or 32 kHz. Epson, for one, makes a whole range of tuning-fork-mode crystals from 32kHz to about 150 kHz. Transverse mode (strip) crystals start at about 1 MHz. So you might need a divide by 2 or 4 to get into the 200 kHz to 1 MHz range. What freq do you need? ------------ Barry King, KA1NLH Engineering Manager NRG Systems "Measuring the Wind's Energy" Hinesburg, Vermont, USA www.nrgsystems.com