How close were you?
Are both radios new?
How good a match did you get when tuning the antennas?
Check coax and antenna mounts for shorts.
Is either radio SSB and are you sure you're on AM?
Do you have another radio you can test?
"But it does me no injury for my neighbour to say there are twenty gods, or no god. It neither picks my pocket nor breaks my leg." - Thomas Jefferson, Notes on the State of Virginia, 1782
Arguing with a truck driver is like wrestling with a pig in mud, eventually you realize the pig enjoys it.