[Boatanchors] WANTED: FT-243 Crystal for 7160 khz
Glen Zook
gzook at yahoo.com
Tue May 14 11:04:56 EDT 2013
There were a number of commercially available crystals that had a machine screw and a knob through the cover of the holder. By varying the pressure on the crystal one could change the frequency. Depending on the actual crystal, as much as 2 or 3 kHz (at the fundamental) could be covered.
Several years ago, I came up with a kit which can be installed on FT-243 holders to achieve this. Frankly, there wasn't that much of a demand and I stopped making them. But, I still have a few left.
Glen, K9STH
Website: http://k9sth.com
________________________________
From: Richard Solomon <w1ksz at earthlink.net>
To: boatanchors at mailman.qth.net
Sent: Monday, May 13, 2013 10:34 PM
Subject: Re: [Boatanchors] WANTED: FT-243 Crystal for 7160 khz
There was an article in QST, back when the earth began to cool, that
used a screw mechanism
to apply pressure to the Xtal that caused it to shift frquency. Touted
as a Novice VFO (IIRC).
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