1. | Kenwood Amplified Phone PKT-23K User Guide INSTRUCTION MANUAL B62 2576 10 K UHF FM TRANSCEIVER PKT 23 Terminal Descriptions 3 5 mm phone jack No Name Description Impedance I O 1 GND Ground Ground 2 EXTPTT External PTT Detection 47 k I 3 MIC External MIC Input 1 8 k I 4 EXTSP Internal Audio Output 32 O 5 Not used 6 Not used 7 Not used |