Last time I tried to get those little round Epson 4 MHz Xtals from Digikey they were out of stock. I tried the CTX006 microprocessor crystals by CTS and found that they didn't work very well. I got lots of crashes and the occilator would quit every time I put a probe on OSC1. This didn't happen with the small ones. Does anyone have any good sources for 4 Mhz crystals that work well on the pic? TIA -Otmar- ----------------------------------------------------------------------- Electric Vehicle Components Ltd. It's often said that life is strange, But compared to what? sf Otmar Ebenhoech tess@netcom.com (415) 494-9255 -----------------------------------------------------------------------