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.

Wednesday, November 4, 2015

Tychobrahe Octavia

The Octavia is one of the many legendary effects to come out of the late 60s. It is also one of the rarest pedals of the era, as there weren't many built. Like most effects of its day, the Octavia is a positive ground effect. There are several schematics for it floating around, but the one I based this layout on can be found here. Most positive ground effects I layout I also post a negative ground effect version as well. I haven't done so for this one to keep the classic mojo of the original. If you want to make it negative ground, just rotate electrolytic caps, the 1N4001 polarity protection diode, and use NPN transistors for  Q2 and 3.


7 comments:

  1. Hi, this is my 3rd effect which I made with your layouts. DBD and Superfuzz are awesome. Can you make layout in version with negative ground like in other effects. I'll be very thankfull for that. I make efect in this layout and when i pluged it i noticed that iit is negative ground and i had no power suply for that. To solve this problem i can make inverter using ICL7660s but other effect (with negative ground) will not work in chain of loop.

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    1. Read the last sentence of the post. ;)

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  2. What npn transistor should I use?

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    1. Try 2N3904s or similar medium gain NPN.

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  3. Thanks man, effect sounds great with 2n3904 transistors. I added switch between D1 and D2 like in fulltone Octafuzz and replace 42tm022 with LT44 (is easier to get).

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  4. just built one of these. Insane amount of gain with the listed transistors in the positive ground configuration. Might rework it into negative ground after i reassemble one of my guitars. Right now I'm all about the bass.

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