On Fri, Jan 14, 2011 at 1:05 PM, Richard B. Gilbert <[email protected]> wrote:
> Have you considered temperature control? Try putting the crystal in a home > made "oven"? All you have to do is to ensure that the crystal is maintained > at a constant temperature. That TAPR clock board is pretty much the answer. I did not know about it until it was pointed out here. There is slightly more to it then just constant temperature, that is actually very hard to do well. The TAPR board let's you use an existing lab "standard" you may already have. So you save a bit that way. Also the crystals they put in ovens are cut so that have a flat spot or "bump" in the temperature vs. frequency curve and then they set the oven to that spot on the curve. A crystal pulled off the computer may not have the right kind of curve for being ovenized. Yes simply stabilizing the temp might be good enough but using a lab standard is literally more than 1000 times better. -- ===== Chris Albertson Redondo Beach, California _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
