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Computer Control of Icom IC-R by Allan Butl » Mon, 28 Aug Hello, I have a friend with one of these radios and he would like to build the interface and program his own computer to control the radio. Control program for Icom IC-R? Not a problem with the PRO Its computer-controlled scanning is anemic. If all you do is listen to the local fire dept. Consequently, the R is smaller.
Many of the functions controlled by separate rotary switches and potentiometers in the R are controlled by pushbutton switches and firmware in the R The R has an interesting AFC circuit, controlled by a front panel switch.
The AFC will automagically tune the receiver close to the center frequency if you tune near an FM signal. You can watch the frequency change as the AFC steps the receiver in kHz increments. The AFC never quite tunes to the exact center, but tunes within a window set by a different amplifier circuit, so the station sounds good even though the R is slightly off-center frequency. R and R users have the same choice of modes, but they are easily selected from front panels controls in the new R There are 9 banks of channels.
Further, you can associate each channel with 1 of 10 groups. W3YHF , May 10, N2HUN likes this. Get yourself the service manual. There is a CR backup battery for memories. I don't own that receiver, but it might be the easy fix. If you want to change them yourself, definitely get the service manual available free on-line as it's not an easy task. I replaced mine a few months ago while doing a realignment.
Attached is the photo of my unit with the button cells. JPG File size:
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