button will become functional. Without this board, pressing the button usually does nothing.
The IC-R15 is a true modern marvel. Its color display, vast memory, and robust feature set make it a powerful tool for any radio listener.
Installing the UI-7 is a straightforward process because Icom engineered these radios with pre-wired factory slots. Tools Required: Phillips-head screwdriver (size #2) Anti-static wrist strap (recommended) A soft cloth or foam mat to protect the radio chassis Installation Steps:
Unscrew the retaining screws on the top and bottom covers of the radio chassis. Carefully slide the covers off to expose the internal circuit boards. icom ui7 am fm unit
: The board is installed on the bottom of the radio after opening the case. Installation Highlights
Converts the receiver to a for FM signals (compared to double-conversion for standard modes). FM Sensitivity Typically around 0.5 μVmu cap V for 12 dB SINAD on the 28 MHz band. Market Availability
When installed in an IC-725, the UI-7 provides the following performance metrics: button will become functional
If you're hunting for one of these, keep an eye on eBay or Radioworld UK —they are getting harder to find but totally worth it for the IC-725/728 series! #Icom #HamRadio #IC725 #RadioRepair #AmateurRadio 2. The "For Sale" Listing Post Best for: Selling the unit on a marketplace.
: Enables FM reception across the radio's general coverage range (typically 30 kHz to 33 MHz).
It provides the necessary variable reactance frequency modulation circuitry required to both transmit and receive local FM signals. Its color display, vast memory, and robust feature
Some configurations of this transceiver also utilized the UI-7 for expanded mode support.
The UI-7 has a dedicated following and has been the subject of community discussion, particularly regarding troubleshooting. On the EEVblog electronics forum, a user recounted a unique situation: his IC-725 had a clone of the UI-7 board that only provided FM capability, not AM. It is also a common source of troubleshooting as these radios age.
Ensure the main board connectors aren't oxidized. If the radio sat empty for decades, clean the female chassis sockets with a drop of high-quality electronics contact cleaner (like DeoxIT) before reseating the UI-7. Sourcing a Vintage Icom UI-7 Today
Websites like QRZ.com, QTH.com, and eHam.net are excellent places to post "Want to Buy" (WTB) advertisements.
For amateur radio operators, particularly those who own vintage or classic Icom HF transceivers from the late 1980s and early 1990s, the is a crucial optional accessory. While many HF rigs are designed primarily for Single Sideband (SSB) and CW (Morse code), the UI-7 board expands these radio capabilities to include Amplitude Modulation (AM) and Frequency Modulation (FM) modes, opening up access to 10-meter FM repeaters, local FM simplex, and AM broadcasting stations.