• Preface
• Bose TriPort Tactical Noise Cancelling Headset Internal Pin Assignments
• Schematic
• Cable Interfaces

This project has the goal of providing a 2-person intercom, with interconnection to a VHF/UHF FM amateur radio transceiver, to be installed in a Ranger UTV. The intercom provides a driver isolate switch, enabling the passenger audio to be muted from appearing both at the intercom headphone output and at the transceiver microphone input. When the driver isolate switch is not in the isolate position, both the driver and passenger audio is routed to the transceiver microphone.

The intercom supports a single Bose TriPort Tactical Noise Cancelling Headset at the driver position, and a standard aviation headset at the passenger position. Both positions are provided an independent volume control.

Interface wiring to the Bose headset, aviation headset, and the transceiver is through adapter cabling that transforms signals on an 8-pin header to the connector interface required for the headsets and transceiver.

When a Bose TriPort Tactical Noise Cancelling Headset is not available, the intercom can be wired to support two aviation headsets.

This article is provided as a courtesy. A single prototype was put into service in a UTV, with good results. No support is provided, and no guarantees are offered to those attempting to build this intercom. Caveat Emptor!