[time-nuts] Fundamental limits on performance

Bruce Griffiths bruce.griffiths at xtra.co.nz
Thu Sep 17 23:09:10 UTC 2009

Rick Karlquist wrote:
> Lux, Jim (337C) wrote:
>>> impurities.  The JHU crystals are apparently in some type of glass
>>> enclosure which can take the high temperatures, and the paper seemed to
> The processing temperature is limited by the phase change of the
> quartz.  Above a certain temperature, it is permananently changed
> to another form that is useless for oscillators.  Is there any
> evidence that these crystals are actually baked out at a higher
> temperature than cold weld copper packaged ones?  The link to
> JHU was broken.
> Rick Karlquist N6RK



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