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, December 22, 2017

EarthQuaker Devices Erupter

Merry Fuzz Friday, everyone! Here's EQD's latest fuzz offering, the Erupter. Essentially it's a JFET buffer into a pickup sim (the transformer) into a Fuzz Face-esque circuit. The Bias control controls the amount of voltage going to Q3 and is a center detent pot (though a regular B10k pot will work just fine). This one might benefit by adding a volume control to the output. Should fit in a 1590B just fine. The 2N497 transistor might be hard to source, but other low gain transistors should work. Schematic can be found here.


13 comments:

  1. Transformer arrives today from Mouser. I'll try to verify over the weekend.

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  2. if i want a volume what pot should i use ? is there any good remplacement for 2n497 ?

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    Replies
    1. Probably an A100k or maybe an A500k since it's so similar to a Fuzz Face.

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  3. There is one original version of the Erupter that uses a 100k trimpot as an output volume control.

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  4. Does it have to be that transformer or can a similar one be used?

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    Replies
    1. A similar one could probably be used, just compare datasheets.

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