On 1/8/06, Mike Hagen wrote: > > Many moons ago I used International Crystal in Ok. for ham radio crystals. > They have a pretty good website and used to be real helpful on the phone? > They made me several crystals at nearly $15 each 30 years ago! Ouch! Cal Crystal Labs made me some one afternoon. Talk about rush, I was in Santa Ana at the time, and before I could drive up there, they had them built. No guarantees on aging though, but that was a given. At the moment I'm using West in BC Canada, because they know how to make the crystals for the Daniels repeater gear that I'm putting on the air here. Basically, when you're specifying things (rather than selecting a crystal) the tradeoff in shunt capacitance is stability and startup time. Lighter cap values start faster, but also are more subject to variability. The parasitic value in your circuit isn't something you can control all that well, so the larger C values make that number less important. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist