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.htmI 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