The manual for the Icom 422 makes no mention of the wires for the NMEA in, out and speakers being coaxial. They are. The negative is carried in the outer braid. These are small wires. That center wire is hard to strip.
The manual for the Icom 422 makes no mention of the wires for the NMEA in, out and speakers being coaxial. They are. The negative is carried in the outer braid. These are small wires. That center wire is hard to strip.