Just a thought about something simple you may have overlooked. Do the
end index marks on the dial line up with the extreme travel limits of
the variable cap? It might be off a little and the other bands might
have been aligned to the error where as band 3 might have less adj in
it. Mike KF6KXG

Since I have had the receiver in and out of the cabinet numerous times,
and since I have to turn the receiver chassis upside down I have to
remove the dials to keep from damaging them, I have had many
opportunities to make sure that the index marks line up correctly.

But thank you, it is a good thought....