Check this MT link out, and this one as well. You won't find everything they do here, but it's got quite a few of this and that for the hobbyist.
Thanks for the links. I live pretty close to Oak Ridge. But most of the Fed systems there are digital. I’m far enough away from all towers so I can run the amps though. I keep one scanner programed with mostly control to repeater frequencies on the locals so I can tell if they’re in the neighborhood.