Allen ADC 1110 Disconecting Keying Circuitry to Install Midi Conversion Kit

[Russ Tapp]

After attempting to add an Artisan midi conversion kit to an Allen ADC 1110 while keeping the internal organ playing I have come to realize through the expert help from moderator John, that the Artisan Midi System is not compatible with the Allen ADC Keying Matrix System.

I think it best that we relent to disconnecting the Allen circuitry after all.

Since this is my first project of this type and that I am a complete mechanical novice I could use this forums DIY expertise. So any detailed instructions on how to accomplish disconnecting the Allen ADC keying circuitry would be hugely appreciated.


1. Do we clip all the diodes? If so do I clip them before or after the band on the diode? Then do we have to remove the soldering from the diode that is connected to the contact?

2. Do I also need to disconnect the Allen wire on the common? Do we also need to clip the common bus wires?

3. Also how do we do this on the magnetic pedal division? I'm not able to determine where the common wire is on the pedal board. If you could be specific on how to wire the pedal board that would be much appreciated.

Thanks to everyone for your patience with an electronic newbie!
--
Russ

[John Kinkennon]

At this point the simple approach is to remove the diodes by clipping them at the switch side -- actually I would clip both ends and remove them completely. There are bus wires (no insulation) connecting sets of four switches. Disconnect the wiring from these bus wires and jumper one to the next so that there is a single bus connection that goes to every switch. This single bus wire is connected to ground on the encoder. Then wire each remaining switch contact (where the diode was removed) to the encoder.

If you did not already have the Artisan "bus" encoder I would suggest combining sets of four switches to create an 8x8 matrix using the existing Allen wiring. I'd disconnect the far end of these wires from any Allen circuitry and connect them to a new 8x8 matrix encoder. I mention this only for other users who may have similar projects.

Keep us informed of your progress. I've converted a number of Allen organs to MIDI but all except one of them were the MOS versions.

[Russ Tapp]

John,

Thanks for your precise and simple to understand instructions!

I do have one more wiring issue I could use some help on:

How do I in easy to understand layman’s terms do I wire the pistons including the “set” and “cancel” pistons.

Thanks in advance for your kind and expert help!

[Innocentti]

Check post

[John Kinkennon]

There are multiple posts about this in multiple locations. I commented elsewhere that the photographed connections are not 11x6. Take care.