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, December 14, 2016

Red Llama + BMP tone stack

I drew this up last month on a whim, built it and it actually sounds pretty good. It's just a Red Llama with a Big Muff tone stack tacked on to the end. Ripe for tweaking to your own taste, especially with the values of the tone section. I changed the values to give boosted mids, but those are easily changed (consult google for different tone stack values), and I used 47n caps instead of 68n and 33n that are normally in a Red Llama (only because I have a ton of that value in my parts stash haha).

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12 comments:

  1. UnknownDecember 14, 2016 at 11:23 AM

    cool!!!
    any vid with this mods??

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  2. MetalheadDecember 14, 2016 at 8:19 PM

    Nice

    ReplyDelete
  3. H.A.December 16, 2016 at 9:09 AM

    Sorry for being offtopic, but what's the fonts type name? Thanks in advance!

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    Replies
    1. Effects LayoutsDecember 16, 2016 at 9:16 AM

      No worries. I'm kind of a font freak and sort of surprised no one has asked about my font selection before. haha

      That one is Hamma Mamma Jamma

      http://www.dafont.com/hamma-mamma-jamma.font

      Delete
    2. H.A.December 16, 2016 at 10:09 AM

      Me too! When it comes down to do my enclosure design I'm always looking for the most suitable fonts for the type of effect. This one looks perfect for old school fuzz boxes are phaser or vibe'ish effects. Thank you for sharing that information with me! :)

      Delete
  4. IvMJanuary 4, 2017 at 12:35 PM

    Does the Tone Stack modify the original Red Llama general drive and tone? For example: less bass response, etc.

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    Replies
    1. Effects LayoutsJanuary 4, 2017 at 1:10 PM

      If you use the values I posted then yes (to some extent) since I used values in the tone stack that will boost the mids. However, if you change up those values to have a flat response, then any tone change from the original should be hard to discern.

      Delete
  5. IvMFebruary 16, 2017 at 7:16 PM

    If I want to bypass the tone stack, all I have to do is cut trace between 10uF cap and 33k res/10nF cap... cut trace between tone 2 and vol 3... and jump them with e DPDT switch.

    10uF to DPDT lug 2, 33k/10nF to lug 1, vol 3 to lug 5, tone 2 to lug 4. Lugs 3 and 6 jumped. http://4.bp.blogspot.com/-q4tY61gLF9Y/VX8L3ZXEjxI/AAAAAAAAFLU/JiaV_a8Oa3o/s640/Switch%2BNumbering%2BGuide.png

    Am I right?

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  6. skizoideOctober 26, 2018 at 10:58 AM

    The perfboard and the pcb for etching aren't reversed.

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  7. Ryan RichardsonApril 23, 2020 at 4:39 PM

    I built one of these on the Vicuna PCB and was pretty unimpressed. The first 80% of the gain pot was barely even audible and had zero treble. It went from being tepid mud to full gain with almost no subtlety in between. I set it aside for a few weeks then came back to it. I checked the schematic and realized the 1M gain pot was also acting as a high pass filter, so not only was it decreasing gain by decreasing resistance in the feedback loop-it was adding that resistance to the output, lowering volume and treble.
    I soldered a jumper between pins 2 and 3 on the gain pot and IT CAME ALIVE! This thing's AWESOME. Very touch responsive and open sounding, and useable across the entire gain range.

    ReplyDelete

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