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, March 30, 2016

Wampler Faux Spring Reverb

The Faux Spring Reverb, like many pedal reverbs is based around a Belton reverb module. Originally it used the BTDR-1 (which is massive), but in this layout I've adapted it for the newer and smaller BTDR-2H. I've also simplified the power section a little, and used a TL071 for the second IC. In the original a TL072 was used, but only used half of it. Here's what Brian has to say about his design:

The great thing about the Faux Spring Reverb is that it retains the Analog base tone, doesn’t send your signal through digital/analog converters and back again (wrecking your tone completely) allowing you to be as springy as you like without your sound becoming lifeless, dull and… well, bad. With the tone control, you can control your sound completely and have your reverb be as bright as day, or dark as night… As lively and bright as a small hall, or as deep as the biggest cathedrals.




Edit: I realized this afternoon that the Depth pot would hit the Belton brick, so I've changed it to a 9mm pot and it will clear the brick. The whole thing will be really snug, but it should be doable.

50 comments:

  1. This looks very nice and neat - again. Is there a chance you post the related schematic (or a link)? Thanks

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    1. Thanks! Here's the schem (ignore the green lines)

      http://postimg.org/image/pwhr0u519/

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    2. Wow - that was quick! Thanks a lot!

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  2. hi, which BTDR-2H sounds better in this pedal? short, medium or long brick?

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    1. I haven't built it, but I would guess the long brick will be best. That's what I would use anyway.

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  3. I am interested in modding my current Faux Reverb tone control to be darker and brighter when dimed. Is that possible? Are there any other mods I can do to my pedal?

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  4. Mark it verified dude. Very nice, sounds great, big hall reverb or subtle touches and everything in between, nice controls. Going straight to the pool room.

    One suggestion, maybe mark the pins of the 7805 for orientation. I was happy to look it up but for ease of use for the next bloke.

    Thanks again for this and all the other layouts man!

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    1. Ah, I missed that. Normally I do mark the pins. Thanks for verifying

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  5. Replies
    1. Preferably 71 but the 61 would probably work

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    2. Would a TL071CP and TL072CP work?

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  6. could you please check whether the 220uF, the one near tl071, is oriented correctly?
    thanks bro

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    1. Nice catch. It was flipped backwards, but I've updated the image above.

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  7. Hi everyone,

    Just building this and I'm a little bit worried about where to wire the pots.
    Do they really share some holes as the 100k and 100r resistors ?
    Shade and Level pots don't have anything wired to their lung Nr 2 ?

    Thanks for your help !

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    1. None of the layouts on this blog will have components sharing holes. This layout is for board mounted pots, so the Shade pot is mounted to the 3 pads between the 1µF and 22nF caps on the left, the Level pot mounted to the 3 pads just below the 1N4001 diode, and the Depth pot right in the middle at the top of the board.

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    2. Aaaah that make so much sense!
      Thanks a ton for your quick response, I'm usually used to building on stripboard and am not used to these PCBs.
      Thanks again !

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  8. Hey!
    Does anyone has any clue how to make depht even deeper and shade even darke/bighter?

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  9. Replies
    1. I can confirm it works, have one in mine. Great layout - thanks. Love all the Wampler stuff - how about a Black 65?!

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  10. Is there any way the "top" of the board could be printed without the trace lines, and reversed, so that a toner-transfer could be made to the top side of the board as well? It would be pretty epic to be able to have a matching diagram for the top.

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  11. Hi... need a heatsink in 7805?

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  12. Is there any particular reason why there are multiple ground connections on the perimeter of the board? Is it for grounding jacks and switches?

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  13. Which pot i can replace C100k ?
    Thank you.

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  14. it looks like I would like to have a bit more level!!!! Maybe if I could take it to 12 instead of 10!!! Is there any mod??
    THNX in advance!

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    1. all ok! I just put a 68K instead of 6K8 cause I didnot see the dot on the layout!!!!
      An old man's problems! LOL

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  15. I printed the drill layout but it became smaller than my 1590b!!!!

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    1. Make sure your print settings are at "Actual Size" (or 100% depending on what program you're printing from) and not "Fit".

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    2. Which pot i can replace C100k ?
      Thank you.

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  16. Pinout 7805 and the same as the 78L05?

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    1. Should be, but google to check ;)

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    2. Pinout 7805 and inverted, compared to 78L05, but Pinout is correct for 78l05.
      Thank you
      works very well, beautiful reverb.

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  17. Not sure so I need to ask. This is my first build with your layouts. Are all three legs soldered in? I see there is a space for them. I just want to make sure. Thnx for the great site:)

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  18. Great work
    Can I ask for schematic? The link you posted in earlier comment doesn't work

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    1. Here you go:

      http://freestompboxes.org/download/file.php?id=23339&mode=view

      You'll need to log into FSB

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  19. I built it, sounds great! Except I noticed one thing that really bothers me. When a note (or notes) are held, after a fraction of a second, the effect signal pans slightly around the dry signal, making an extremely light but noticeable chorus-sounding effect. I don't know if this is just part of the effect, or if it's a problem that can be fixed, but it seems more accentuated on my pedal. Any thoughts or potential solutions would be appreciated!

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    1. Sounds like you're describing the modulation that's built into the BTDR-2. I think it comes from the clocks in the 3, PT2399s that are inside it. Read that somewhere on the Madbean forum... I think. The modulation my be less pronounced in the short length bricks.

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