The is a classic "hidden gem" for amateur radio enthusiasts who own vintage Icom transceivers like the IC-725 , IC-721 , or IC-728 .
It is highly likely you are referring to one of two things: icom ui-7 am fm unit
The UI-7 doesn’t just send and receive; it becomes the audio hub of your vessel. And in a storm, with rain lashing the windscreen, you’ll be grateful that one handset lets you monitor Channel 16, call the marina, and get a local weather forecast on AM—all while keeping your other hand on the wheel. Icom UI-7 AM/FM Unit The is a classic
Icom no longer manufactures these units. Your best bet is eBay, QRZ forums, or specialized estate sales. Availability: Icom no longer manufactures these units
The primary purpose of the UI-7 is to add AM and FM transmission and reception capabilities that are otherwise dormant in the radio. Transmission Unlock
They marched through the moonless dark, not with GPS, but with one woman holding the UI-7 to her ear like a seashell, the other hand pointing toward the invisible beacon. The enemy’s high-tech scanners searched for radio chatter, for cell phones, for digital footprints. They found nothing. The UI-7 was a whisper in a hurricane.
How does the UI-7 interact with the IC-706's main controls? Understanding this distinction is critical to using the unit properly.