[Patrick]

Let's go back to that one, first. Listening to a station around 1100khz. As soon as I try to tune to another frequency (higher), RF stops. I've got it to come back doing various things, such as injecting an IF signal and flipping the wave band switch. Once it came back by touching a probe to the antenna clip. Once by powering off and back on. Doesn't appear to be any loose connections or cold solder joints anywhere. But when it's working, all I have to do is carefully move the dial towards higher frequencies, and it shuts off. I disconnected the variable cap and slowly went through the intire range on all three, and never a short to ground. Perplexing.

It's like changing the capacitance by un-meshing the variable, shuts everything down.