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I have a PRO III with the "dual watch" function that allows me to listen to VFO A & B at the same time.


other ICOM radios/PRO I, II series may/may not have this function, I don't know.


anyway, I had the dual function turned on and was listening to both VFO A & B  , I was tuning VFO A and when I tuned across the same freq that VFO B was tuned to, the received signal increased, not in "S" meter reading, but in S/N ratio, as I changed VFO A to a different freq,  the signals returned to their previous levels.


at first, I thought that I was imagining it, but, after several times on different bands, it is happening.