I have a question regarding listening to train crews from afar. So I’ve been a railfan for years now, I have good commercial/ ham gear to listen and I understand that dispatchers talk to the crews on the rails via Microwave but I’ve always wondered why I can’t hear the train crews from long distances in the same way that I can hear the NS dispatchers talking from Georgia to Pennsylvania on a microwave frequency. Is there some kind of Microwave (900Mhz) frequency I can tune to so I can hear farther out? With my current setup I can get about 20 miles of coverage. Hope this made sence. Thanks all. KC3MZX