This is my version of the 70's Vox and Color/Solasound SUPA and Jumbo Tonebender. It's based on the classic BM circuit with some different value components and only one clipping stage, instead of two. This diode clipping stage is also germanium in this version. I use NOS TO18 (tin can) BC108's. Both contribute to the classic early 70's fuzz tone.
My designs are inspired by the classic old units but with modern components and appointments and many options like true bypass or non-true-bypass switching, LED's, added "active" tone controls, boosts and "Boss" compatible 9-volt adapters. NONE of my pedals use batteries.