The reason it doesn't broadcast on all the towers is because the outer region has fewer frequencies than that center regional and if there isn't anyone selected on a TG on the outer region the outer region towers stay quiet. Once there is someone on the outer region that turns their radio to a TG that is in use in the center region, the towers come to life.
Center Region Towers. WPFG219 (Centre Hall, Port Matilda, Rattlesnake, Philipsburg, Rockview, Boalsburg). WQPE256 (Pine Grove Mills, PSU).
Outer Region Towers. WQPE228 (Kylertown, Sandy Ridge, Tyrone). WQPE225 (Mingoville, Woodward, Howard, Snow Shoe 1, Snow Shoe 2, Pine Glenn).