D6 Clavinet - Power adapter mod

[Electroharmony]

I recently acquired a Hohner D6 Clavi (ya!) and there is an odd mod where the stock power adapter should be.  It seems a previous owner has drilled out the original barrel adapter receptacle and replaced it with a 1/4" jack.

Can anyone make any sense out of this??

[sean]

I have some circa mid-1980s DOD guitar stomp boxes that came with a wall-wart power supply that had a 1/4" jack as the connector.  I always thought it was an accident waiting to happen.