EML 100 problems

[media at mail1.nai.net]

I have a broken EML 100.  It's not an EML 101.  It's an earlier model.
Does anyone have EML 100 schematics??  If you do, you might be the only
person in the world who does, so please get a hold of me.

The EML 100 filter has separate output jacks for LP, HP, and Mode.   The
Mode pot is labeled LP-BP-HP-BR-LP along its rotation.  The LP output is
visibly broken.  Dangling off of the hot side of the connector is a 470 Ohm
resistor.  The other end of the resistor is disconnected.  Any ideas where
it goes??

I have the schematics for an EML 101 filter in front of me.  They are dated
11/15/74 and initialed "JJM."   It shows a 470 Ohm resistor at the output
of a 741 going to a jack labeled "Mode Out."  The negative input to this
741 is the wiper of a pot connected to points labeled LP and HP at each
end, with a center tap connected to BP.  The 741 also has a 10K resistor in
its feedback path, and another 10K resistor on its positive input going to
ground.  The patch diagrams for the 101 do not show output jacks for LP and
HP

On the EML 100 I have, the HP output is connected by a 470 Ohm resistor to
center tap on the Mode pot (the pot has 4 lugs, three lugs as usual, and an
extra lug towards the back -- the HP is connected to this odd lug).  A
green wire goes from this center tap to somewhere on an op-amp (?).

The Mode output is connected by a 470 Ohm resistor to a terminal strip
connected to a white wire with a green stripe normalled to the VCA input,
but is otherwise unconnected.  That doesn't seem right.  However, it could
be possible that the filter output is wired to the VCA jack rather than the
Mode out jack -- electronically it would still work but it feels like a
sloppy way to wire it.

Still, the big question is:  how is the LP output connected??

Is there a website or a good source for info on ancient op amps??  The EML
101 schematics show 741 and 748 in the filter.  The synth I have, all the
op-amps are in cans.  Some are unlabeled.  Some are labeled (Motorola) MC
1496.  Does anyone know the pinouts of a canned 741??

As the keyboard or related circuitry also seems broken, any schematics for
the keyboard driver, sampler, and note computer would also be very useful
in adding CV inputs to replace the keyboard.

Finally, does anyone have a source for replacement selector switches for EML??

THANX!!

PEACE OUT :)
MARK