It's been a while since I've last read any of the books but I've been wondering
Does the book ever mention who or what the Russian Radio is (if it's in the book anyone know what chapter)?
Also if I remember correctly during the building of The Radio there was mention that the gas station was a big faraday cage, did that end up being significant in anyway?
~SPOILERS~
Yeah I don't think he knows what it is either. Like the tall man in a trench coat for a while I thought it was his annoying racist co-worker who was living in the woods for a while. I'm just terrible with names the guy that was picking on Rosa. The trench coat guy never did anything was just standing around the gas station. Aside from the time Jack had a fit and made him run away on all 4s. I don't think he ever showed up after Jack yelled at him.