This is my take on Barry’s “Super Drive 70’s” build. I give you, the “Cachaphonic Crockpot” . . . .
Just the straight-up build, using the toggle switch mods for the bass boost options and a clipping diode selection daughterboard because the diodes & configuration I selected just wouldn’t fit on the main board. I’m using some large NOS high-Vfd Germanium glass diodes. There is no marking on them, I only know from the vendor that they are Mullard, are rejects for their hi-Vfd and are unmarked. Tested, they measure about 0.62v Fvd – 2 in series on one side and 3 in series on the other for asymmetry. The other clipping diode setup are two 3mm UV LEDs with a Fvd of about 1.2 volts. The idea was to keep the volume difference between Silicon and Germanium diode switching to a minimum.
Mostly, I wanted to build this circuit for the potential for an awesome interface and I think I may have gotten close to that. Based on the photos, you can decide.
The finished project:
And here’s the sexy part – the gutshot:
The part I enjoy most about pedal building is populating a PCB and creating the enclosure graphics. For PCB population I use a soldering iron. For enclosure creation I use Photoshop and either inkjet waterslide decal stock or straight-up photo paper. After adding the last component to a board, I like to take a photo of the result: