A little more history ...
WMGM was something like 2800 watts mono at around 150 feet on the old 185 foot AM tower
until 1972. At that time, they took it up to 20,000 watts (stereo) with a 5 bay Phelps-Dodge
antenna. The old AM tower was so rusty, the tower crew wanted no part of it, so they put
up a new tower at the same time. Like Mike said, it went to 50,000 watts on the new 385 foot
tower in 1985. We applied for 549 feet, but the FAA knocked it down because of the airports.
It was supposed to be non-directional, but at the last minute the owners of WNNJ in Newton, NJ
changed their minds and didn't sign an agreement to allow us to do it. They were stuck at 5000
watts due to then un-resolved issues with 103.5 in New York (Lake Success) They later struck
a deal and got up to 20,000 watts.
The AM had been a shunt-fed on the 1972 tower, and I put a base insulator on it an made
it a series fed, which worked pretty well, but the hollow leg tower developed rust and we
took it down and moved the AM to a folded unipole on the new tower.