At Sunday, October 23, 2005 9:21 PM, Tom Clark wrote:
Going in the other direction, the mechanical resonant frequency
changes with time because, as the xtal vibrates, microscopic cracks in
the structure of the quartz break apart. Running at high power makes
the crystal generate these
Poul-Henning Kamp wrote:
But did you test it both in horizontal an vertical orientation ?
I am not aware of any vertical testing, although the burn racks
may have been vertical. The end application had random orientation
and no one reported any orientation dependence.
Rick Karlquist
It has nothing to do with throwing off atoms. A Xtal is actually a
This only happens in very low quality crystals that have impurities on
the surface.
Going in the other direction, the mechanical resonant frequency
changes with time because, as the xtal vibrates, microscopic cracks
Hi,
I posed this question to Jack Kusters, now retired
from HP/Agilent. He and Charles Adams commercialized
the SC-cut crystal for HP in the 10811A oscillator. He
gave me permission to post his response on the reflector.
Jim Johnson
[EMAIL PROTECTED]
