[time-nuts] optically excite a quartz crystal?

Mike Feher mfeher at eozinc.com
Mon Apr 21 09:11:43 EDT 2014

In my over 50 years of active ham radio experience as well as in my
professional one, I have literally taken apart 10s of thousands of crystals,
and, have never seen a single on where there has not been a physical contact
with the quartz. That of course includes the most common FT-243. Regards -

Mike B. Feher, EOZ Inc.
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960 office
908-902-3831 cell

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Bob Camp
Sent: Sunday, April 20, 2014 9:06 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] optically excite a quartz crystal?


The WWII era FT-243 is one example of a crystal that has the active portion
of the electrodes separated from the resonator by an air gap. There are lots
of similar holders from that era that do pretty much the same thing.
Non-contacting electrodes are not very new.


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