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Thanks to those who replied. It turns out that the
VOX circuit is weak on ALL these transceivers. The TR7 has the same problem. I
found modification posts on the www. for that vox circuit. (Although, the
published mod is NOT the way I would do it.) I ran PSPICE simulations on the VOX
circuit and I will make actual gain measurements to insure all is as it should
be. I have tried this with my present mic as well as my D104. The VOX gain is
just low.
Jim
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