Tim Wescott wrote:

I've got a National NC-46 that I'm resurrecting. The alignment is waaay out
of wack, with the top ends of the tuning ranges as much as 25% higher in
frequency than they should be.


You probably know this already, but it bears repeating:
Alignment is never waaay out of whack - unless someone with
a "golden screwdriver" was in there before you. Look for
a defective component in the circuit - open/shorted/changed
value caps come to mind.