Help! NC-46 Tuning Question
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. Furthermore, when I increase the trimmer
caps on the RF coils the resonant frequency appears to go _up_ instead of
down (I even tacked on a fixed capacitance to verify my sanity). I've owned
and maintained newer tube radios, and built transistor rigs, so in theory I
should know what I'm doing, but this problem has me stumped.
Does any of this sound familiar? Are there any factory manuals available
for the NC-46 that detail the factory's opinion of the correct alignment
procedure? Where can I get one?
Thanks in advance.
-------------------------------------------
Tim Wescott, KG7LI
|