21 Sep
2010
21 Sep
'10
1:30 p.m.
I'm sure Nick will appreciate the offer...
unfortunately, the one that's
in there is a 14-pin DIP. I'm not remembering now if I saw a manufacturers
mark on the package but I do see now that Fairchild made a single 709 in
a 14-pin DIP...
Most of the time the 14 pin DIP has 6 pins on the ends (2 at one end, 4
at the other) unused, and the remaining 8 pins have the same conenctions
as the 8 pin DIP (or the TO99 isf you spread out the leads
appropriately). You should be able to fit an 8 pin op-amp onto that board
(not original,but it preserces the circuit design and it is the sort of
thing that would bave been done when the machine was in use).
-tony