Oberheim custom wiring harness

My customer, Michael, invented this configuration of an SEM, MS-1A mini sequencer and a mixer module.  He intends to integrate this into a larger patch that will include at least one other mono synth slaved to the sequencer and one or two external gate and CV controllers.  Oddly, the MS-1A Michael procured for this project has had the front panel paint stripped off.

A good wiring harness design includes these three important  aspects. 1:  Interconnects system components as per the electronic schematic such that the function of hardware is not compromised by the interconnect system.  Attention to proper grounding, shielding and cable routing is important.  2:  Implements serviceability by providing access to, and easy disconnect from, all components in the system.  3. Does not degrade reliability - wires are bundled and secured such that stress is equally distributed over all wires and connections.  Good quality stranded hookup wire and proper crimping and solder techniques are crucial in achieving professional results.  Sloppy work, lack of planning and inferior materials can significantly erode the success of a wiring project like this.

Michael found a web site that lists all the connector pins and their function on the SEM and MS-1A along with their recomendations for building a patchable system.  With this information Michael produced a panel layout fitted with 1/8" 2 conductor jax.  My first input was that a bunch of those jacks need to normalize a predetermined signal connection.  For example, one of the VCO CV inputs is generally connected to a 1 volt per octave Key CV.  Replacing the standard 2 conductor jack (Switchcraft 41) with a normalizing jack (Switchcraft 42A) allows for a pre-wired patch connection on that signal line.