Here’s a 1974 Moog Synthesizer Accessory Operation Manual I scanned into a 5 Meg PDF file. It includes information on the 1121 Foot Switch, 1120 Pedal, 1130 Drum Controller, 1150 Ribbon Controller and 1125 Sample & Hold accessory. It’s 34 pages long and features the Minimoog and Sonic Six synthesizers with plenty of diagrams and examples.
Thanks for sharing this. Strange though, I have a 1120 and it looks different to the one described in this manual. Mine does not have a power switch but it does have an external power input !!
I have an 1120 with the external DC power input too. I also have a copy of the service manual that shows the DC power input, as on my pedal. The manual I have is from 1979.
Obviously, the 1120 pedal shown in the Operation manual is different than that owned by most people. I have three 1120’s, all without the switch. The Moog accessories service manual (993-043290-001) does not depict or mention the switch either.