On Aug 22, 2008, at 8:10 PM, Samppa Tolvanen wrote: > > Can You share the schematics? Ooops, sorry I should have thought of that. I have Magnus's page bookmarked so I didn't think of it. http://rubidium.dyndns.org/~magnus/synths/companies/buchla/Buchla_2080_5_200.jpg See left part of diagram where it says "balanced modulator." - Aaron