: Compatible with the IC-721, IC-721M, and IC-721S.
Disconnect the radio from its 13.8V power supply. Remove the top cover screws of the transceiver to expose the primary RF board assembly.
Switch to AM . Tune to a strong local mediumwave (AM) broadcast station. Compare the audio with the board installed versus your memory of the stock configuration; you should notice a cleaner, more robust audio profile with less clipping on signal peaks. Troubleshooting Common Issues:
. While the IC-725 has a dedicated "AM/FM" button on its front panel, these modes are non-functional unless the UI-7 unit is physically installed inside the radio. Key Features & Specifications
Enables both the transmission and reception of FM signals.
When you search for an "icom ui7 am fm unit" or "Icom AM FM receiver," you're touching on two distinct but equally important facets of the Icom legacy: the legacy of modular transceiver upgrades and the modern reality of powerful portable receivers. This article acts as your definitive guide, separating these distinct products and delivering a deep dive into the world of Icom's AM/FM capabilities.
Integrated intermediate frequency (IF) discriminator and envelope detector.
The UI-7 is not a radio for the impatient. It is a radio for the faithful. Its tuner is a direct-drive optical encoder—no presets, no digital fluff. Each click of the dial is a mechanical prayer.
For units currently installed in radios that are not functioning:
Connects directly to the radio's internal intermediate frequency (IF) chain and audio amplification stages.
It provides the necessary variable reactance frequency modulation circuitry required to both transmit and receive local FM signals.
In short, the UI-7 effectively upgraded an IC-725 or IC-728 into a true all-mode transceiver. (Note: This board was not needed for the later IC-729 model, which already had these capabilities integrated).
The ICOM UI-7 is a universal accessory. It was specifically engineered for the chassis architecture of specific late-90s/early-2000s ICOM HF transceivers. Compatibility is strictly limited to:
The UI-7 is a hardware PC board that installs inside the radio chassis. Once installed, it enables the radio to function as a high-quality AM/FM broadcast receiver alongside its amateur transceiver capabilities.
The IC-R6 is a perfect example of Icom's engineering prowess: a miniaturized, efficient radio that fits in a pocket without sacrificing essential features.
The UI-7 is specifically intended for use with several Icom models from the late 1980s and early 1990s: : Most common application for this unit. IC-728 : Requires this board for AM/FM operation.
