Yes I had a half dozen surplus crystals at the bottom of the 40 meter
novice band. I ground them using toothpaste on a plate of glass to move
them up in frequency. If you went too far, you could add some pencil
lead to move them back down. But you had to do it carefully or the
crystal would fail to oscillate.
Alan N1AL
On 01/21/2017 08:59 AM, Mark E. Musick wrote:
Ron, Don't forget about grinding the crystal down a little using
Comet or Ajax on a piece of glass. I had crystals I moved using both
methods, pencil and grinding. One to move down in frequency the other
to move up in frequency.
Mark, WB9CIF
-----Original Message----- From: Elecraft
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ron D'Eau
Claire Sent: Saturday, January 21, 2017 4:30 PM To:
w...@zoominternet.net; elecraft@mailman.qth.net Subject: Re:
[Elecraft] K3: past chirp report
...
Many novices used "surplus" crystals from military gear and it was
common to find several stations on the same frequency when the band
was open. So we tinkered with ways to move the crystal frequency
slightly by rubbing solder or pencil 'lead' (graphite) on it but one
could only go so far or the crystal would stop oscillating.
73, Ron AC7AC
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