Hi,
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As an experiment,?I made a printed circuit board for a simplified (PTT-only) microphone and also a 3D-printed case for it.
I built a few and they work although I have to turn the mic gain up a bit.
This is probably related to the electret mic element that I used.
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The files to build this mic can be found here:
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Also I have a few extra circuit boards
If anyone wants to try building one, please contact me by private message.
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73,
Scott? ?KJ7NLA
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Scott Baker