Electro Harmonix Bassballs.

[joemetaldog]

I'm not sure about the original schematic, but i found this one:

http://www.diystompboxes.com/smfforum/index.php?topic=80298.0

Which looks pretty close to the circuit Mark Hammer has used in this video:

http://www.youtube.com/watch?v=eoAIKHFGOcQ

Would love to see a layout for this one!

[Olav]

There's one here; http://www.aronnelson.com/gallery/main.php/v/cathexis/Veroboard+Layouts/Bass+Balls/BassBalls.jpg.html
Looking at all those links, it might be a bit bigger than it needs to be?

[pappasmurfsharem]

Ditto on this...  MARK/MIRO

topopiccione schem (true bypass)
http://topopiccione.atspace.com/pjimages/EHBassBalls.sch.gif

Factory schem:
http://topopiccione.atspace.com/pjimages/EHBassBalls.old.jpg