[600MRG] restoring old crystals ??

[Carl]

The 99% is a staple in many pharmacies and if they are out they can get it 
in a day or so. Had to replenish mine last year, cost under $3 at Walgreen 
in this little rural town.

Carl


----- Original Message ----- 
From: "Robert Grizzard" <grizzarv at iowatelecom.net>
To: <600mrg at w7ekb.com>
Sent: Tuesday, February 05, 2013 8:50 PM
Subject: Re: [600MRG] restoring old crystals ??


>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
>
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