OT: for sale
2004-04-05 by J. Larry Hendry
I have two of my long since discontinued 831 modules for sale. Only 50 were produced. The two I have are serial numbers 01 and 02. They were hand assembled by me. These PCBs are no longer available. The 831 is like the 822, but has three channels instead of two and only one shift knob per channel. It shift 5 intervals up and 5 down. These are selected at the time of building by resistor selection, and can easily be changed by changing resistors. It currently is built for: Shift +5 = up 10 semitones (dom 7th in the octave above) = +0.83333 volts Shift +4 = up 7 semitones (5th in the octave above) = +0.58333 volts Shift +3 = up 5 semitones (4th in the octave above) = +0.41667 volts Shift +2 = up 4 semitones (major 3rd in the octave above) = +0.33333 volts Shift +1 = up 3 semitones (minor 3rd in the octave above) = +0.25 volts Shift 0 = no shift Shift -1 = down 5 semitones (5th in the octave below) = -0.58333 volts Shift -2 = down 7 semitones (4th in the octave below) = -0.41667 volts Shift -3 = down 8 semitones (major 3rd in the octave below) = -0.66667 volts Shift -4 = down 12 semitones (one octave below) = -1.0 volts Shift -5 = down 24 semitones (two octaves below) = -2.0 volts Here is all the info about these modules: http://www.wiseguysynth.com/larry/jlh-831/831.htm I find that I simply do not have room in my system for the 822s and the 831s both. I have outgrown my cabinets have new modules coming this year from Paul (510 and 480 pretty soon I hope). Some of you may remember I sold these as kits for a short time. The kit price was around $145. I would like to sell these two completely assembled and ready to use for $125 each. I'll pick up the shipping cost at that price. They have seen little use. These are built with the larger diameter rotary switches which are OK for rack rails. The top switch must be changed for wood cabinet / flat rail mounting. Those adjustable stop switches are commonly available from Mouser. E-mail me if you're interested. Thanks Larry Hendry