: The IC-728 can already receive AM shortwave signals natively; installing the UI-7 explicitly activates the transmission line for AM phone operation.
Engage in the "warm," nostalgic audio of the AM community on HF bands. Complete Your Rig: Many enthusiasts seek these units on secondary markets like to fully "max out" their vintage equipment. Maintenance & Performance Tips The "Mega Bass" Fix:
Radios like the IC-726 and IC-729 already have these features built-in and do not require the UI-7. The "Collector's Story" RigPix Database - Accessories - Icom UI-7 icom ui-7 am fm unit
Understanding exactly what the UI-7 does is key to appreciating its value. Think of it as a mode-enabler that adds significant versatility:
It is an internal plug-in board. Installation typically involves routing wires (often referred to as jumper wires) to specific pins on the front panel board (e.g., Jumper 5 and 6). Why You Might Need One Today : The IC-728 can already receive AM shortwave
If you are a collector or a "ham" operator using a legacy IC-725, finding a UI-7 is the only way to: Access 10-Meter FM:
A separate connection (often a brown wire) may be required to link the unit to the front panel control board (J5) to activate the mode switches. or help locating a second-hand unit Maintenance & Performance Tips The "Mega Bass" Fix:
She searched records and logs, asked radio operators, and scoured the harbor’s memory. No one could find a scheduled broadcast that matched what she had heard. The map, the phrase, the voice—all led to a quiet kind of certainty that some things are shared to be kept, not catalogued.
Note: The features built-in AM/FM functionality natively, meaning it does not require the UI-7 module. Technical Specifications
. While most modern radios come fully loaded, this specialized unit was the key to unlocking broader communication capabilities in the late 1980s and early 90s. What is the Icom UI-7? The UI-7 is a mode-expansion unit designed to add AM transmission FM transmission/reception