[Elecraft] K3: past chirp report

[Alan Bloom]

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-bounces at mailman.qth.net] On Behalf Of Ron D'Eau
> Claire Sent: Saturday, January 21, 2017 4:30 PM To:
> ww3s at zoominternet.net; elecraft at 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
>