The Muff could have been made months or even years after the pots were purchased as it is known that Electro-Harmonix bought the pots in bulk, as did Fender, and other companies at the time.
Stackpole and CTS made the pots in large runs also, so they may have shipped pots dated earlier than the year Electro-Harmonix ordered them. Some Triangle Muff pot codes are dated 1966, two years earlier than the founding of Electro-Harmonix!
Stamped on every potentiometer (volume and tone pots) is a six- or seven-digit source code that tells who made the pot, as well as the week and the year.
The source dating code is an element of standardization that is administered by the Electronics Industries Alliance (EIA).
For a brief history of how fuzz came to be, check out my previous article on the History of Pedals There are two basic types of fuzz: silicon and germanium, which refer to the type of transistor used in the circuit.
This set up provides a good lead guitar sound but I don't know how these mods sound with germanium diodes.great pedal, quite simple but sounds perfect. Mods are changing the .047uf cap to a .1uf cap to increase the bass response, changing the .001uf cap in parallel to the clipping diodes to a .01uf for less trebel, and changing the 500K reverse-log pot to a 100K linear pot because even though it means your minimum distortion isn't as low it provides a more linear response. I built with either a RC4558D or TL082CP op-amp and assemetrical silicon clipping diodes. In the simplest terms possible, fuzz is simply what your guitar signal sounds like as it is being literally destroyed.It found its way as a very useful semiconductor material by the late 1940’s and helped in moving a lot of electronics away from the use of vacuum tubes, ushering in the beginning of the solid state era.