[sdiy] triple concentric pots

[Mike]

> Does anybody else remember those guitars from the 70s, I think they
> were made by Electra? You could plug one or maybe 2 interchangeable
> effect modules into the guitar. An interesting idea on paper, I suppose.
> --

In the UK we had the Shergold 'Modulator' series. see

http://www.shergold.co.uk/collection.html?detail=Modulator6_1

A (very) long time ago I did some on board effects for the owner of one of
these - he got Shergold to sell him some module parts and I built some
distortion stuff to his spec, including some wierd pentode simulator I made
from an RF MOSFET, though I've long since lost the notres, if indeed there
were any.

Mike