D-104 Microphone Xtal Element

[Joe Buch]

At 17:10 3/23/98 -0800, you wrote:
>what would cause an element to go bad in the d-104??
>thanks
>steve
>wa7isl :)

Steve,

Crystal mike elements can be damaged by excessive heat, humidity or a
combination of the two.  Applying a DC voltage across the element, such as
might be present in a modern rig to run an electret element, can stress the
crystal and cause it to crack.

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