What effect is used on the solo to Paranoid?

[boogietube]

What effect is used on the solo to Paranoid by Black Sabbath? I'd love to build one. Sounds like an octave effect with some fuzz.I really don't know.
Thanks.

[KerryF]

Ring Modulator.

Could use an octavia type circuit for the octave up fuzz which sounds like a ring mod sometimes.

[boogietube]

If it is a ring modulator - which project should I build?

[John Lyons]

I don't think it's a ring mod or octavia although it sounds kind like that. I may be wrong but I thought I remember something about a dead battery....

[pyrop]

The unusual distorted guitar solo was recorded straight and then processed during mixing "through a sound modulator of some sort," recalls Iommi, most likely one of the many assorted effects boxes Bain collected at the time.

Quote from Here

pyrop

[jonathan perez]

What effect is used on the solo to Paranoid?

Iommi's hand of doom.