[600MRG] restoring old crystals ??

[Robert Grizzard]

I would think Everclear (an EtOH/H2O azeotrope at 95%+ EtOH if your 
state sells the 195 proof stuff) would work too and may well be more 
readily available.

Rob, KG7YY

On 02/05/2013 07:25 PM, Carl wrote:
> Grinding or acid etching will raise the frequency.
>
> You still have to clean it first as contamination over the decades
> lowers the frequency andreduces activity. Use 99% pure or better
> isopropoyl alcohol. Then measure the frequency.
>
> Carl