[Radioroslyn]

Oh this is a very easy problem to solve. Just replace the 1 percent! A couple of things come to mind. In the center of the tuning condenser there's a brass strip that is the ground connection the the rotor. Use a little bit of Deoxit on it to insure a good connection at the rotor. Make sure the ground connections to the chassis are good. The rivet by the IF transformer and the 36 tube may be an issue. Run a separate ground wire.Same for pin 4 of the detector tube. Clean the screw that is the ground for the IF transformer that goes though the Bakelite cap. Take a working set and take a listen for the local oscillator on it 470kc above the dial setting of the model 80. Does it jump around as you tune it?
Terry