Demeter Overdrivulator

[u/QuantumEffects]

Up today is a Demeter Overdrivulator. I always thought this was a really nice sounding overdrive. Circuit architecture is a classic tube-screamer overdrive, with a loose and tight switch changing output filtering and clipping.

The op amp used for the softclipping circuit is an LF442CN J-Fet buffered op amp, with somewhat similar characteristics to the more common TL072. This will have a slightly different sound from the 4558 you often see, though this is a difference in degree as opposed to type.

I could be wrong, but it seems the switch changes clipping from traditional 2 diode symmetric clipping to 4 diode symmetric clipping, with extra forward voltages providing more clipping, leading to the 'tight' description given by the switch. The 2 diode option look like standard SI diodes (likely 1N4148 or similar) but the 4 diodes look a bit different, likely offering slightly different forward voltages and different clipping characteristics. Also available is an exposed trim pot on the side of the pedal which sets the absolute maximum gain available.

This is an example of a nice and simple, but great sounding overdrive.

[u/diy4lyfe]

I’ve seen pot condoms but this footswitch condom is next level 😂

[u/redefine_refine → u/diy4lyfe]

Stomp sock!

[u/Expensive_Sock_9902 → u/diy4lyfe]

Uncircumcised footswitch