FAQs

Q: Can you please let me have the pin out for the 5pin LEMO audio connector on the DUO talk-back transceiver?

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1: AF+ Balanced audio output to earpiece with impedance of 8O or greater.

2: GND Return for PTT and MIC inputs and headset cable screen. (Also functions as antenna connection)

3: MIC Microphone input 6000O nominal input impedance

    Normally linked for electrets microphone

    Internal link to allow for moving coil

    Internal adjustment to allow for -45dBm to -81dBm input range

4: PTT/CTCSS

    6K8 (±10%) to GND to turn on CTCSS tone 1 and key the transmitter

    2K2 (±10%) to GND to turn on CTCSS tone 2 and key the transmitter

5: AF- Balanced audio output to earpiece with impedance of 8O or greater

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