https://lottiecanto.com/builders-blog daily 0.75 2025-09-08 https://lottiecanto.com/builders-blog/dod-grindhaus-a-fuzz-mystery monthly 0.5 2023-08-15 https://images.squarespace-cdn.com/content/v1/5f1edb67956ab804fb9aab03/63744864-05b6-4cd1-9430-264ca2d854d9/DOD-Grindhaus-TRACED.PNG Builders Blog - DOD Grindhaus: a fuzz mystery - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5f1edb67956ab804fb9aab03/9363fa8c-8a59-4f9b-be21-c7abb58643dd/Grindhaus-initial-trace.PNG Builders Blog - DOD Grindhaus: a fuzz mystery - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5f1edb67956ab804fb9aab03/3417f9f9-50d0-4dc7-b778-05ad117b8400/Series-Capacitance.png Builders Blog - DOD Grindhaus: a fuzz mystery - Mystery solved! (sort of) knew I recognised the circuit as it has a few quite distinct parts. Firstly the two back to back pnp and npn transistors. The only fuzz that sprang to mind here was the old superfuzz schematic but this was a dead end since that was really the only similarity. The other thing I noticed was the two capacitors in series. This is an unusual thing to see since these two capacitors in this configuration can be replaced with one by using this formula above. https://images.squarespace-cdn.com/content/v1/5f1edb67956ab804fb9aab03/96abc0f1-f972-4d25-98b5-3f62eaf3067d/Devi-Ever-Hyperion.png Builders Blog - DOD Grindhaus: a fuzz mystery - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5f1edb67956ab804fb9aab03/20bbf422-82c4-46f2-a9b0-5bb7a26f9fc7/DOD-GRINDHAUS-MAIN-PCB.jpeg Builders Blog - DOD Grindhaus: a fuzz mystery The big kick in the teeth at this stage is that it is all surface mount. This makes it much harder to trace not because of the size but because smt capacitors don’t have values on them. While three of the four transistors were through hole and easy to tell what they are, there was one transistor which was surface mount. The code on that was also obscured by either some pen or some dust or something in the photos. Knowing all this I pressed on and traced it anyway and will come back to what this transistor is and the values of these capacitors at a later date. I spent an hour or so on a train slowly tracing the whole circuit. The resistors had readable values but with no capacitor values I needed some more information. If I had the pedal in front of me then I would have measured the values myself but the best way forward was to figure out if its based on anything. in the world of fuzz pedals a lot of new designs are just better or different versions of something old (at least thats been my experience anyway). Its pretty cool to see the improvements that have been made over the years. 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I think it’s really nice to know about the person who makes the things that you enjoy. I’m assuming since you’re here you do too. so heres a little bit about me: I live in Bristol in the UK with my partner Avery. I started this company building everything in the corner of my childhood bedroom and now have a small home office/workshop which has a little more space! I love ice hockey and my favourite animal is the earthworm. Here’s a link to my Spotify if you fancy having a look through what i’ve been listening to. Lotties Spotify if you have a question, check my FAQ Page. 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