Here's a preliminary update on the AM mods!
1. Connected IC 5 - P 7 (upper pin R76 too on second try) to NJM2609 P 2 - Mixer Signal 1 Level CV In. [DCO2 AM DCO1]
Result: It works! It also works in conjunction with the FM Mod and of course the Moog Slayer Mod, of course. There's a nice beating effect.
Question: should I connect to the further pin of R20 before coming into the NJM P 2?
Also tried:
2. IC 5 - P 7 (upper pin R76) to NJM 2609 P 4 Res CV In
Result: It works! Nice internal modulation of the synth's resonance with DCO2's shape.
3. IC 5 - P 7 (upper pin R76) to NJM 2609 P 9 VCA CV In
Result: It works! The result is a bit trashy/distorted, but maybe can be better with a pot.
4. IC 4 - P7 to NJM2609 P 3 - Mixer Signal 2 Level CV In [DCO1 AM DCO2] -works, of course, which means both 1 and 4 could potentially be used for Cross-Modulation.
I uploaded a new file describing this:
http://f1.grp.yahoofs.com/v1/4PIpTgG_-ttyX_XHKF6tSHeVG2CM9UgjjaQHu5Or7CSefcF2BsELkDt3zCP3SlMbLzbol3WCPVAGHc7Z4XUM-EBPqDGTniQ/4%29%20Modifications/AM%20Mod%20%26%20AM%20Cross-Mod%20Proposed/AM%20Mod.jpg