> Thanks Dan. Found it, the Citizen part number is HC49US50.000MABJ. > Think this is also 3rd OT from their website. > http://www.citizencrystal.com/quartz/crystals/hc49_d.htm > > Manage to get some 3rd OT, will try it out and inform all later. Try this link http://www.saronix.com/pdfs/128/128.p1.pdf which is a document called "miniature high frequency fundamental 30-250MHz" Steve. ====================================================== Steve Baldwin Electronic Product Design TLA Microsystems Ltd Microcontroller Specialists PO Box 15-680, New Lynn http://www.tla.co.nz Auckland, New Zealand ph +64 9 820-2221 email: steveb@tla.co.nz fax +64 9 820-1929 ======================================================