[jayoungs]

Unfortunately, this is where my ignorance becomes very obvious. I don't know exactly what the vernier drive is, except some further searching I did seems to indicate this is a secondary tuning drive. I may be wrong.

Simply put, there are three shafts on the front of my Model 60 chassis. The middle shaft turns the shadow dial and rotates the blades on the tuning condenser. When I turn the shaft with my fingers, it basically spins freely and only seems to "catch" the blades and rotate them every couple of shaft turns - when the blades should be turning in direct correlation with the shaft turn. It seems something has come loose or broken inside that would have connected the blades to the shaft.

I hope this helps explain my predicament better.

exray - thank you for your reply. If this addition info helps explain, please let me know if you have any additional thoughts.