UPDATE: My thanks to reader William Badjek, who found in error on page 31 of the v01 project file, which would have prevented the tone control from working properly. (The schematics, however, were correct in v01.) If you’ve encountered that issue, please revisit that page of the v02 project file, now available at the link below. My apologies to anyone who got stuck on this!
Here’s the project file for Tonefiend DIY Club Project #4: the Fiendmaster, a fab-sounding update of the Dallas Rangemaster, the circuit that put the punch in so much classic British rock. If your record collection includes a lot of albums from around 1970 featuring skinny guys with long hair and flared trousers, you need one of these!
It sounds incredible. It’s a relatively easy build. And unlike strict clones, this version runs on a regular modern power supply like the rest of your pedals. It also includes a knob that fades between the original’s bright, snappy Brit blues sound, and the humungous sludgetone that spawned Sabbath. You can round up all the parts from the usual suppliers for less the 30 bucks, or just order a pre-assembled kit from Mammoth Electronics.