| Feature | Main IC-706 Faceplate | Icom UI-7 Unit | | :--- | :--- | :--- | | | Full radio control (frequency, mode, memory) | Audio volume & squelch only | | Rotary Dial | Changes frequency / Menu selection | Controls Volume (default) | | Push Action on Dial | Enter / Select | Toggles control between Volume and Squelch | | PTT Button | No (located on microphone) | Yes (dedicated PTT switch) | | Function (F) Key | No | User-programmable (e.g., Monitor, Tuning Step) | | Display | Full LCD with spectrum scope | None (LED indicator only) | | Mounting | Requires separation kit (OPC-581/589) | Magnetic back / Velcro / Bracket |

Manufactured in Japan during the late 80s and early 90s, the UI-7 is now a sought-after collectible on the second-hand market. Since these units are long discontinued, finding one in good condition often requires scouring specialized sites like Radioworld UK or auction platforms like eBay . DIY Modernization

The is an optional internal plug-in board designed for vintage Icom HF transceivers from the late 1980s and early 1990s. Its primary purpose is to add FM transmit/receive and AM transmit capabilities to radios that originally only supported AM/SSB/CW reception. 🛠️ Technical Specifications

The core purpose of the UI-7 is to enable the radio to receive frequencies outside the standard Amateur bands. While the IC-207H is a dedicated 144MHz and 440MHz transceiver, installing the UI-7 module allows the user to listen to:

Ensure your radio's mode selector recognizes the new unit. On the IC-725, once the UI-7 is installed, cycling through the "Mode" button will now include FM and AM. Final Thoughts