Vtrig Converter Board For Vintage Moog Modular 911 EnvGens Posted by estateofsynthfool on 08/12/2016 Posted in: Ideas. Tagged: 911, envelope generator, ideas, mods, modular, moog, synths. Leave a Comment File dated November 28, 2005 Vtrig Converter Board For Vintage Moog Modular 911 EnvGens Posts navigation ← Vintage Minimoog VCO board diagram & schematic Custom Clear Wheels for Vintage Minimoog →