[Boatanchors] Crystal Grinding

[Wilson Lamb]

I found a set of plates and an old xtal.
Available if wanted.
WL

----- Original Message -----
> From: "infomet" <infomet at embarqmail.com>
> To: "Boatanchors" <boatanchors at puck.nether.net>
> Sent: Tuesday, January 1, 2019 5:34:33 PM
> Subject: [Boatanchors] Crystal Grinding

> I ground many FT-243 surplus xtals into the 80 and 40 novice bands when I was a
> kid.
> Dad had a small balance weight, maybe 5-10gm, that was used for test.
> One just laid the xtal on the xmtr chassis, sat the weight on it, and read the
> freq. from a RX.  No need for a holder.
> One could, of course, use another xtal as a reference point.
> I bought xtals for a dime and sold them for 50 cents...but it took some time and
> a little skill.
> Dad brought home two grades of carborundum dust, fine and finer...
> Your blanks are much larger, so I can imagine getting up to 25-20gm weights.  A
> few trials will tell.
> I doubt you have balance weights, so solder up a stack of coins, maybe quarters.
> 
> Add one at a time, until you get good performance.
> Grind the bottom flat before the first try.
> I've thrown away quite a few loose plates from old large xtals.
> They would be good as the bottom surface.
> 
> Wilson
> W4BOH
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