[Milsurplus] FT-241 LF Crystals as a Long - Term Investment Instrument

[John P Hutchins]

 Catching up on this subject-
Have you tried removing and washing in vinegar and ammonia  seems like they
may over time collect :
encrusted with calcite, barite, or lime carbonates. I would try washing
before tossing?
Just a thought.


On Tue, Nov 5, 2019 at 9:23 PM Hubert Miller <Kargo_cult at msn.com> wrote:

> I had this bag of those WW2 FT-241 LF crystals, which were used in the WW2
> era FM  and ship radios.
>
> I realized I needed to finally make an executive decision on it, so I
> tested them all. I used the little Chinese
>
> crystal tester I bought off Ebay for $12 or $18. I connected a couple
> alligator leads to the LF crystal connection
>
> points on the tester.
>
> Result: 74 defective, 13 working = 85% fail rate.
>
> I did find one possibly good frequency, 457 kHz, but – for how much longer
> ?
>
> Well, this kind of ends any fascination with possible uses of the LF
> FT-241s for me.
>
> -Hue
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