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Hello. If this is the wrong forum I apologize and please direct me to the correct place.

I am the Communication Officer of a FD and we are involved with ARFF for a local airport. I am having problems with a Icom IC-A4 aircraft portable radio. I don't know a lot about Icom radios.

Up to six months ago we were able communicate fine with the airport tower from our Firehouse, approximately 1 mile away with the Icom. Now we can't. The radio just came back from the shop and it checked out OK. We can receive fine. As far as I know the radio is programmed correctly and nothing changed at the Tower.

Any thoughts or ideas? Thank you in advance. Henry
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