> do the pre-STS (early 80s I guess, not the vey firstAFAIK, the modules using +6v were the first generation ones
> Serge series) serge panels require +12/-12 volts plus
> +6 volts supply?
from around 1973, and they were discontinued around 1980.
Modules requiring +6v were:
Peak & Trough
Gate/Ring (old 6 pot/jack ones, also called MOD)
Envelope Generator (old one with "window", not ADSR or DUSG/DTG)
Dual Negative Slew
Dual positive Slew
Triple Comparator
Schmitt Trigger (the early single schmitt with just in & out)
Sequencer (the old 10 stage Pulse sequencer)
and possibly early versions of
Programmer (4 stage)
Steve