[n9vu]

Hi Gary

Assuming you're working on an early 70 (without AVC), here's what I would check:

• Antenna coil (2) and RF coil (6);
  ALL wiring from tuning condenser to the various points under the chassis;
  tightness of the screws on the sides of the tuning condenser;
  the RF amp tube, Type 24.[/list:u]
  I think it's probably a combination of bad antenna coil (2) and/or RF coil (6) and wiring/screw tightness issue on the tuning condenser.
  
  The second Type 24 tube from the front is the mixer tube, so your problem has to be ahead of that. The wiring/screw tightness on the tuning condenser can cause lots of intermittents.
  
  Hope this helps. Happy troubleshooting!
  
  (edit) Well, Chuck and I answered at almost the same time, so now you have two votes pointing to those coils. Take a look at them right away. Good luck.

Thanks Chuck and Ron for the advice. I've also noticed one of the 24's, the one in the very front may be bad just by it's looks, but this is a big maybe. The inner components are leaning to one side, not loose, but wondering if this is causing any malfunction in the receive as well. That's kind of a simple resolution. With the tube tester I have and a spare tube or two I'll see if this resolves anything.

Thanks again,

GB