One easy way to get rid of moisture is using a vacuum. One can easily convert an old pressure cooker into a vacuum chamber. I did just this about 10 years ago for about $25 - $30. Just need a new gasket, vacuum gauge, ball valve and a few 1/4 inch brass fittings. The holes are already there so no machining was needed. Lowes carried most of what I used along with eBay. I already had the compressor / vacuum pump from a small air brush sprayer.

Jim

Logic: Method used to arrive at the wrong conclusion, with confidence. Murphy

On Friday, May 30, 2025 at 12:46:22 PM CDT, Brenda Gentry via Milsurplus <[email protected]> wrote:

ATTACHED is the method recommended by Western Electric to rejuvenate carbon microphones.

B.Gentry, KA2IVY

On 5/30/25 1:22 PM, Rich MC Clung via Milsurplus wrote:

Check the microphone element. Most of that older equipment had carbon composition microphones. The carbon sometimes becomes compacted. We used to take the microphone element and tap it a few time on the bench top and check it a few times to see if it was working any better.

RICH WA6KNW

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