- This topic has 4 replies, 2 voices, and was last updated 4 years, 7 months ago by .
Viewing 5 posts - 1 through 5 (of 5 total)
Viewing 5 posts - 1 through 5 (of 5 total)
- You must be logged in to reply to this topic.
Home › Forums › Vintage EHX › [Electronic Art] SPIRAL – Electro Harmonix – 1979
Hi All!
I found this: https://imgur.com/a/kQ8xWVO
do you have some info about this device of electronic art?
It has 2 jacks, I don’t have the power supply. I suppose 1 jack is for power and the other for the line in. But there isn’t write what they are.
do you have some schematics or manual?
thank for your time and your help
Giulio
Very cool! I’ve never even heard of this before. I would guess 9vdc with a positive tip. The other jack may be for controlling it with a signal rather than sound activation.
I think I’ve found the patent:
https://patentimages.storage.googleapis.com/90/b4/df/cff83d2c9c6b1e/US4264845.pdf
Pretty nifty! I’d love to see it in action!
I just remembered that if you remove the bottom cover, you may find a connector for the battery. The enclosure is very similar to the one used for the Mini Synth.