This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.

Friday, March 22, 2019

Skreddy Fuzz Driver

Happy Fuzz Friday, everyone. Here's a modded Fuzz Face from Skreddy Pedals. Early versions are all germanium and later versions are a hybrid germanium/silicon setup. Since it's so similar to a Fuzz Face, there's a lot of room for experimentation. Here's the schematic for reference.


12 comments:

  1. Hey:)
    To make it a hybrid would it be as easy as sticking an si transistor in q1? Would there be any mod you would suggest?
    Thnx,

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    Replies
    1. Yeah, I'd start with a low-medium hFE silicon transistor in Q1. You may need to adjust the 56k resistor from 9v to the collector, but I'd start with just replacing Q1 and go from there.

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    2. There's plenty of good discussion on diystompboxes.com on the topic... some simple and some with great detail:
      https://www.diystompboxes.com/smfforum/index.php?topic=77340.0
      https://www.diystompboxes.com/smfforum/index.php?topic=118863.0

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  2. Verified! Used silicon both, bc 549, 2n 5088, tried Ge q1 MP 38a, Q2 - mpsa 14,18, bc 549, 2n 5088. My verdict: Q1 Ge mp38a hfe 60-85(tried a lot of), Q2 si - 2n5088 hfe=430 or kt 3102 e hfe=500-700, all good working! 56 kom should trim individual & very exactly, no more,no less.& yet, i changed drive 5k to 20 kom.

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  3. if you will use Q2 with low hfe, you will get low gain.

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  4. Boa tarde. Quais TRANSISTORES tem um maior rendimento? E para D1?
    Grato.

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  5. The Hybrid Fuzz Driver insides that I've seen had three transistors: 2 Si and 1 Ge. Do you have a schematic for that one?

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  6. Is it different from this?
    https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTUkQWgMgZ4LLCD6c1yiIcBjZZttI41zbB-7w&usqp=CAU

    ReplyDelete