Problem with SM30 desk mic on Icom IC 7300.

Problem with SM30 desk mic on Icom IC 7300.
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I have an icon sm30 desk mic hooked up to an Icom IC 7300 and when I key the mic it makes a noise inside the radio. Kind of like a relay bouncing back and forth very quickly. Only while the switch is in motion. Is anybody familiar with this problem?

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Author: iz4wnp