For serious HF FM operation, especially to access repeaters, a subaudible tone (CTCSS) was often required. This is where the came in.
The UI-7 was designed as a modular solution across a uniform platform architecture. It is fully compatible with the following legacy transceivers listed in the RigPix Database : (The primary target radio for this accessory) Icom IC-721 / IC-721M / IC-721S Icom IC-728 Icom IC-729
Once installed, the UI-7 fundamentally changes the operating characteristics of the transceiver. According to Icom's documentation for the IC-725, here is how the performance changes: Transmitter Performance (e.g., IC-725) The radio will transmit 100 watts on FM.
Are you experiencing any on your rig?
The climax came on .
If your specific kit includes nylon retaining clips or small screws, secure the board to the chassis standoffs. Reassemble: Replace the radio covers and secure the screws. Testing and Troubleshooting
The IC-R15 is Icom's newest handheld communication receiver, released in 2024. It is packed with modern features that make it ideal for aviation, marine, and amateur radio enthusiasts. icom ui7 am fm unit
The UI-7 is designed as a , meaning it does not require complex soldering if the transceiver retains its factory layout.
: Connect the two 3-pin plugs to J21 and J22 on the Main Unit, and the brown wire from J5 on the Front Unit to J3 on the UI-7.
: Enables AM transmission (reception is typically already native to the radio). For serious HF FM operation, especially to access
The Icom UI-7 AM/FM unit is suitable for a variety of applications, including:
Since the front-panel buttons exist on every unit regardless of the board's presence, you can verify if a UI-7 is installed without fully disassembling the radio: Visual Check : Look through the air flow grill on the rear right side of the bottom