Xtal grinding

[Ed Richards]

Walt;
It seems we used Bon-Ami cleanser to raise the frequency and a lead
pencil to lower the frequency..
73,
Ed


On Sat, 15 Jan 2000 09:17:13 -0500 Walt Yatzook <w1atv at HOME.COM> writes:
> Hello to everyone on the list.
>
> I need some help. Does anyone remember the material used to make a
> grinding compound for grinding crystals?

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