Pre-Owned COMM Transceiver
The Collins VHF-251 COMM Transceiver is the standard COMM from Collins' well-regarded Microline series. It is fairly deep, but takes up little space on your panel. The VHF-251 is a slide-in replacement for the Collins VHF-250 COMM Transceiver. This radio may be used in a 28 Volt aircraft, but it will require a voltage converter.