[thirtiesradio]

Sounds like something touching the tuning condenser to me, only because it seems to be repeating itself in the same place. I've had that problem before, doing the same exact thing with the eye tube cutting out. Mine also made a light popping sound when it went dead. In my case a small piece of metal that looked like a couple fibers of steel wool had somehow found it's way into the condenser. The radio worked great for a while then acted up when the wire got into the wrong place. It was hard to find the wire. I ended up running a small paper thin piece of flat plastic through the condenser fins while the radio was in the dead spot and finally located the problem.

Best of luck with it Ron.