Speaking of the old tower...
When Gordon Gray (owner of the Winston-Salem Journal & Sentinel) put WMIT on the air (and its city of license was Winston-Salem (no joke)), he had authority to broadcast with up to 1,000,000 (yes MILLION) watts of power from the site. When they used that kind of power, it was said the station was heard as far west as the Mississippi. But, I'm sure that power wasn't used very long, as the power bill would have been astronomical.
It was still running an ERP of 200 KW from its original tower for many years, but was forced to back down to 36,000 watts ERP in the 1970s. I don't know why that happened, however.
I'd be curious if the new tower location has helped or hurt WMIT's signal, plus I'd like to know why they moved it. I've been to the site (and I have pictures). That whole mountain is amazing. There are only 2 or 3 spots on the entire mountain that are "safe" for extended exposure to RF. At any time, 2,000,000 watts of RF pours off that hill. While on my trip, an engineer held a fluorescent tube in the air and it LIT BY ITSELF from all the RF.
Also, in the late 1980s, Isothermal Community College somehow managed to get space on the mountain for WNCW, where it resides today. 'NCW broadcasts 18 KW ERP from the mountain. I'm sure others have tried to get up there, but I am still suprised that Billy Graham allowed a public radio station on the mountain.