Dusty Dale Brooks said:'HDH did have a tough directional pattern. They had to protect other 850s in MOntreal, Johnstown (PA) and Raliegh. I think when you consider that signal was the least of 'BZ's problems WHDH's success is all the more impressive.
I think some of the folks at WHDH used to have a bit of unneeded paranoia about the signal. Was it a former clear channel like WBZ? Certainly not. But as I stated, there is almost nowhere in the Boston Metro (where the diaries matter) where you could not pick up WHDH both day and night.
After WBZ and WRKO....it's probably the next best AM signal in Boston.