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, June 10, 2015

Xotic AC & RC Booster

Got a request for the RC. The AC is just a few value changes, so I drew them up to be built on the same board. Seems like a Tube Screamer with a 2-band EQ section to me.


15 comments:

  1. para que quede en ac que hay que hacer?

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  2. work for me , thanks for layout, see my vidio https://www.youtube.com/watch?v=6SoAaUVj1SU

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  3. Replies
    1. Yes it has (RC 6 Diodes symmetrically, AC 3 diodes asymmetrically. I shrinked them together and installed them (3 in series) instead of D1-3). Watch the polarity!

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  4. I know it says verified, but I made a AC boost using this layout and couldn't make it sound right, the output was pretty low, I took a long time trying to find something wrong, and just gave up

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  5. Several times checked the circuit, but did not understand what was going on, the sound is very low, the bass in the ground and it seems that locks, fuzz nemnogo.V original zvuchit.Esli everything else will not solve the problem, try the items on another scheme to do.

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  6. Removed 100N** and 500K=250K and the sound became clearer,turned RC/AC ).I was pleased with the sound.

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  7. Any mods for turning it in a BASS RC booster?? :O

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  8. For the RC I recommend to replace the resistor of 47k ohms with a 4k7 ohms. Use a 250k pot for gain. This gives you a clean gain range with a little overdrive at the end.
    I used BC550 instead of the 2n5088 so i dont know if this makes a difference....

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  9. This comment has been removed by the author.

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  10. Not completely verified for me in AC configuration.
    It turns wrong when the bass knob increases. Probably a problem in the tone stack: with my sound probe, it appears that the sound is turning muddy (with strong attack: a lot of compression and very fuzzy) after R8. Any idea?

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  11. Second pcb done and still the same problem. i definitely confirm that this AC booster pcb doesn't work...

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  12. Hey guys, the problem is solved now and come from the drawing.

    If you want the AC booster, you have to install the 3 diodes asymetrically but do not follow the scheme above. D2 must be reversed (in the "south" direction, like D3). D1 and D2 are here, on the drawing, head to tail and will cause the problems i listed before.

    If you take into consideration this mistake, it works perfectly.
    I have used 10k for R5 as it is mentionned on FSB.org
    Cheers!

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    Replies
    1. Yes, thats what i mentioned on sept. 29. I feel sorry, that you fell into the same trap :). I already asked the author to correct his plan. Maybe he just forgot to or didnt have the time yet...

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  13. Swap pin 3 with pin 1 in the gain pot, drawing shows the oposite. Great pedal, thanks as always!

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