Gemtronics GTX-2300 Make Gemtronics Model GTX-2300 Channels 23 Mic Wiring 1 - Audio2 - TX3 - RX4 - Gnd Sams # CB-91 Gemtronix GTX-2300 Gemtronics GTX-2300 – From the collection of Rob SWL#3 Gemtronix GTX-2300 – Rear view Technical Specifications AttributeDetails ManufacturerGEMTRONICS ModelGTX-2300 Product CategoryTransceiver Mic Wiring Pin 1 – Mic Audio Pin 2 – RX Pin 3 – Shield / Ground Pin 3 – Switch Line