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 5, 2014

Zvex Wooly Mammoth

The Zvex Wooly Mammoth is a Fuzz Face derivative designed for bass, but sounds awesome on guitar as well. For this one I've laid it out for on board pots oriented like the originals. On the PCB I added an LED and LED resistor for on/off indication. As with my layout for the Fuzz Factory, this layout is designed for the pots to be mounted on the component side of the board.


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24 comments:

  1. vahnrondelMarch 5, 2015 at 3:16 AM

    tried it... not working...

    ReplyDelete
    Replies
    1. dtgehringMarch 5, 2015 at 9:25 AM

      Care to give a little more information?

      Delete
    2. vahnrondelMarch 27, 2015 at 10:27 AM

      i printed a circuit board for this... all components were tested.. and then when i finished.. no sound is produced by this effect... feeling so frustrated... i built the layout from tagboardeffects.blogspot.com

      i removed all the components and then put it to the new board... layout from tagboard is working.. i slightly compared the 2 layouts and found out that some of the components here are not connected...
      this needs to be thoroughly checked...

      Delete
    3. dtgehringMarch 27, 2015 at 11:33 AM

      Sorry you're having problems with this. It has been thoroughly checked both to the schematic and Mark's layout and it checks out. Check your etch and make sure there aren't any shorts. Since you've already de-populated the board, this may be a moot point, but did you make sure the polarized components (100µ caps, polarity protection diode) were oriented correctly? Did you have the transistors oriented correctly?

      What components are you referring to that you claim aren't connected?I've overlaid the component layout and the transfer images and nothing is disconnected...

      http://s29.postimg.org/bulk2z87b/Screen_Shot_2015_03_27_at_11_30_53_AM.png

      Delete
  2. AnonymousMay 13, 2015 at 10:00 PM

    Hi, i just finish this layout and works pretty good, i hope than can you see this picture: https://fbcdn-sphotos-h-a.akamaihd.net/hphotos-ak-xpf1/v/t35.0-12/11242170_796086197148072_818780367_o.jpg?oh=e5e116247a28109af147e7adf2104e30&oe=55561355&__gda__=1431706184_f5504761d147e91b752aad6b7d625daf

    ReplyDelete
  3. UnknownJuly 14, 2015 at 7:53 PM

    it works, but mine do not sound like what it should, "pinch" pot not really doing anything, and the overall sound is missing tones of high end

    ReplyDelete
    Replies
    1. dtgehringJuly 15, 2015 at 9:30 AM

      Sounds like it could be unbiased. What transistors did you use?

      Delete
    2. UnknownJuly 16, 2015 at 5:50 PM

      it was exactly that! :] i used 2n3904 for both, and some cheap ebay ones too.
      tried quite a few, i think they are too strong, eventually replaced Q2 with mpsa13 and it made the effect nice!! very nice fuzzy sound lots of high end ! BUT its not quite there yet, the "pinch" pot is doing some nice job but as i compare it to youtube reviews it's not exactly like the others, and the pots response feels unnatural, but it dose sound a little more "gatey" wen i turn the guitar volume down a bit

      Delete
    3. UnknownJuly 16, 2015 at 5:54 PM

      also i measured the pot, and it was more 450k then 500k (also eday pots) found one that was 470k mad the effect much better

      Delete
    4. dtgehringJuly 16, 2015 at 9:38 PM

      I got a batch of 2N3904s off eBay and they're all around 350 hfe. I think the Mammoth works better with lower gain 3904s, so see how 2N2222s work if you have any on hand.

      Delete
  4. UnknownAugust 20, 2015 at 3:56 PM

    Hi,
    It's my lovely fuzz, Works ok. But in my opinion the pot. "wool" must be conversley.

    ReplyDelete
  5. UnknownAugust 23, 2015 at 4:42 PM

    I found. Pin 2 of pot "wool" must be connect to ground "-", not to cap 100 uF

    ReplyDelete
  6. UnknownAugust 23, 2015 at 10:47 PM

    cool fuzz see my vidio https://www.youtube.com/watch?v=z4l6gupIN7I

    ReplyDelete
  7. FlojdzikSeptember 12, 2015 at 7:08 AM

    Works very well. Thanks!

    ReplyDelete
  8. UnknownOctober 2, 2015 at 6:08 PM

    Please make PCB for Mastotron http://homemadefx.web.fc2.com/mastotron.BMP

    ReplyDelete
  9. LOCAL FAVORITEDecember 10, 2015 at 4:20 AM

    Just to clarify: the shafts of the pots are pointing toward the viewer in your layout, correct? Like, the shaft would be where there text is?

    ReplyDelete
  10. Effects LayoutsDecember 10, 2015 at 9:21 AM

    The shafts are point away from the viewer. The pots would be mounted like this:

    http://www.synthrotek.com/wp-content/uploads/2012/02/Dev_Pots.jpg

    Hope that helps!

    ReplyDelete
  11. ThaipedalstompboxMay 8, 2017 at 11:43 PM

    https://www.facebook.com/mr.fxman/videos/479032455821695/

    ReplyDelete
    Replies
    1. VST2StudioJune 11, 2017 at 12:21 AM

      https://www.facebook.com/mr.fxman/videos/499042270487380/

      Delete
  12. MartinMay 22, 2017 at 6:15 PM

    Hello, great job. In this case Wool pot increase distortion counterclockwise, this is a difference between the other design for right angle pots. thank you anyway, your site is the best. I will buy you some transistors soon. Thanks buddy

    ReplyDelete
  13. VST2StudioJune 11, 2017 at 12:21 AM

    https://www.facebook.com/mr.fxman/videos/499042270487380/

    ReplyDelete
  14. Monyet GilaApril 27, 2021 at 5:43 PM

    Hei, about pot A2k on wool, its hard to find on here, so it possible if i change that pot with A10k + resistor 100ohm? Maybe the value around 2.5k. Or, If you've recommended resistor value for that, let me know. Thanks

    ReplyDelete
  15. NOCApril 30, 2021 at 6:10 PM

    Is there a drilling template for this one?

    ReplyDelete

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