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.

Tuesday, May 21, 2019

Baja AFD MkII

Gotten a couple requests for this one. Here's Bajaman's second take at his AFD circuit with a better frequency response than the first AFD. More info here on FSB. Should fit nicely in a 1590B.

10 comments:

  1. nice layout David
    Q1 Q2 is dgs, not cbe

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    1. You right. Late night labeling gone awry. Fixed!

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  2. Hi Loving these Pre-Amp sims. How about a nice power amp layout we could use to make these into amps rather than pedals?

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    1. http://2.bp.blogspot.com/-_D_dnGfrxNk/XM-sAJ1cVmI/AAAAAAAAGj8/fV2NvR8nh-8InRkQap37e57cePFqdMaZwCK4BGAYYCw/s1600/Baja%2BReactor.png

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  3. both pots should be Log taper

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  4. An existential question: what does AFD mean?

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    1. AFD stands for Apetite For Destruction
      (Marshall AFD100 / Slash's signature)

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  5. Verified.

    I used some J112's with twisted leads for the JFETs, which should be OK since they are just buffers here.

    This one is a gainy 80's hard rock/metal sounding OD with thin/tight bass, throaty mids, and a bright top. It is not very versitile, but does its one trick really well.

    I would recommend leaving the bright cap on the gain control off, since 10nF is big enough to be a coupling cap. Stock, the gain seems to control only the lowest part of a guitar signal. Clipping the cap normalized the sweep of the pot without muffling the lower (but still fairly gainy) settings.

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  6. Thanks for the layout... More power...

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