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Old March 30th 07, 03:52 AM posted to rec.radio.amateur.boatanchors
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Default fixing crystal mic elements?

Does anyone know of a method to restore old crystal
mic elements? I remember someone mentioning this in
the past but can't find any references to it.

Thanks!
Steve


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Old March 30th 07, 04:26 AM posted to rec.radio.amateur.boatanchors
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Default fixing crystal mic elements?


"Steve" wrote in message
...
Does anyone know of a method to restore old crystal
mic elements? I remember someone mentioning this in
the past but can't find any references to it.

Thanks!
Steve

If this is an old fashioned Rochelle salt type crystal
there isn't much you can do. This type of element is very
sensitive to moisture, it fact, it will partially dissolve.
The only cure is to replace it. I am not sure about the
newer ceramic type elements. I suspect they go bad due to
mechanical damage, again about the only way to fix it is to
replace the element.


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Old March 30th 07, 04:34 PM posted to rec.radio.amateur.boatanchors
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Default fixing crystal mic elements?

Steve wrote:
Does anyone know of a method to restore old crystal
mic elements? I remember someone mentioning this in
the past but can't find any references to it.

Thanks!
Steve


I don't know about the restoration process. But, I can recommend a new
crystal element that is virtually indistinguishable from the old D104 in
output and tone. They are made by Kobitone and Mouser stocks them
(25LM024). The are only a few bucks each.

I have replaced many a D104 elements with them and have excellent results.

Paul

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