![]() ![]() ![]() A poor contact on the key line can also cause problems if the radio's key input isn't designed to handle a high resistance (many are not). TOA Electronics PM-660U Desktop Paging Microphone with Push-to-Talk Switch, 6 Unterminated Cable- TOAs PM-660U is an elegantly styled, compact des. If the Key contact works the radio will go into transmit mode and if the mic contacts are corroded the mic audio will be missing or very attenuated. Integrated Push-To-Talk microphone Braided Cable now available Retail Price: 34.95 Our Price: 29 (You save 5. The microphone to audio line carries voltage to the microphone's internal amp as well as the audio back to the radio or intercom. One set connects the microphone to the mic audio line and the other shorts the Key (transmit on) to ground. DIP switch settings for this mode are: DIP switch 1 - DOWN DIP switch 2 - DOWN DIP switch 3 - DOWN The MX412D may be configured as Push-To-Talk. Have you flown again since? And how are things over at the old T's? The LED illuminates Green when the mic element is active. The push to talk is really just a binary thing - on or off - so if the radio is transmitting at all then I'd be surprised if replacing the PTT fixed your problem. Connect everything from your turntable and stereo to your wired speakers to enjoy vinyl, CDs, stored audio files, and streaming. A single network cable delivers 4 discrete audio channels from each microphone onto the Dante network. ![]()
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