Vintage Synth Repair

I've done exactly what you're talking about. I played a Lowrey 
through an MXR Phase 90, then through a Memory Man, and then into my 
amp. Since I didn't have a direct box or anything, I just had to keep 
the organ's volume pedal on almost the lowest (all the way was no 
sound). It was just something quick. Sounded noisy, but it did work. 
I would have used a DI if I had one handy.

-Mike Walters
www.mysterycircuits.com