1 +8v
2 Frequency Up/Down
3 +8v switched (used as Charge control for HM-90/A). Not IC-7000
4 PTT (connect to pin 7 for TX)
5 Mic Ground
6 Mic Audio
7 Ground (PTT and other functions)
8 Data in from microphone
Icom IC-2200H Mic Connector
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