mh-45b4b

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    Problems with speaker microphones on the VX-454 VHF

    My employer's ambulances use the VX-454 VHF (brand new) for communication when outside the vehicle. I personally purchased a MH-360S and a couple of MH-45B4B speaker microphones for use with these radios, and they do not work, specifically, they broadcast dead air when the PTT button on them or...
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