[Milsurplus] FT-241 surplus LF crystals chan - freq list ?

[Bruce Gentry]

I had some surplus crystals in a Gonset 6 meter rig that were balky or 
would not start at all. They had crud inside them. I used Coleman 
lantern fuel (outdoors!) to remove petroleum base contaminants, then 
washed the quartz slabs in strong  ammonia water, washed everything else 
in very hot water with dishwaher detergent, then rinsed everything in 
hot water and allowed it all to dry for a couple days. Once 
re-assembled, the crystals performed great. The water I used was from a 
dehumidifier, pretty close to distilled. I have no idea if the frequency 
changed, it didn't matter because with two stations using Goon boxes, 
you just tune the receiver to the other station.

       Bruce Gentry, KA2IVY

On 11/13/17 6:28 AM, David Stinson wrote:
>
> Found that many-
>
> especially those in large, Bakelite holders, suffered from various 
> levels of
>
> chemical deposits on the blanks and electrodes.  The gunk was caused by
>
> out-gassing of volatiles from the case materials- Bakelite, plastic, 
> rubber etc.
>
> that settle inside the crystal.  A Q-Tip soaked in Naphtha (Rohnson
>
> Lighter Fluid) swabbed on the inside surfaces comes away with
>
> these deposits.    Had some success cleaning everything with
>
> Naphtha, but a few old large-blanks that had been hand-ground
>
> appeared to have the deposits so deep in the surface that even soaking
>
> them for a couple of weeks would not remove it all.
>
> 73 Dave AB5S
>
>
>
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