Ive been looking for a parts cat for years. Trouble is
they pretty much switched to fiche in the 80's
I think we have some name confusion here. What you have is a selector.
The tuner is separate & mounted on the chassis.
Most selectors were built on ceramic & had printed parts & even
switch contacts. They usually didnt clean well so they got changed.
Price was only about $25 exchange. One easy thing to try if you havent
is tuning the adjacent channel. they overlap so you may get lucky.
The tuner tip still holds. Those PC cons were notorious for drift & other
intermittents.
Differences in numbers can be as simple as lead length or cosmetics.
A selector is nothing more than a 16 position voltage divider that
divides down 32 V for a tuning voltage. Add a switch for channel,
& band switching & an AFC switch. No active parts IIRC.
73 Zeno
LFOD !