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.

Thursday, October 12, 2017

Wampler Tweed '57

Here's another (and more complicated) amp emulator, and another great design from Brian Wampler. This one stacks JFET stages much like the Cranked AC. It emulates a dirty Fender tube amp with a 3-band tone stack. I added trimmers so it's easier to bias the JFETs and it's laid out for board mounted pots in a 125B enclosure.


16 comments:

  1. Great!! Please the black 65!!! Excellent Work!!!

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  2. dude! please, make a sea machine layout! (it's the mad bean's gravity wave!) :D

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    1. What's wrong with building Bean's layout? He's got some awesome etchable layouts. Built a few myself.

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    2. There's a stripboard layout on http://tagboardeffects.blogspot.com/ if you don't want to etch a board.

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    3. nothing really, i would love to see your take on the sea machine :D you make great layouts

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  3. Can't you just build the madbean layout on perf instead of a pcb?

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    1. Not really, the traces on the Madbean pcb are a lot smaller than perf hole spacing, so if you just transferred directly to perf, it wouldn't even fit in a 1590BB. The stripboard layout I posted above is reasonably sized, just do that one.

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  4. Man I wish the J201s wouldn't cost an arm and an leg, this seems like a fun build.

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  5. If you go the smd route you can get them at Tayda for 17 cents a piece. (I think). You have to get adaptors though. You can get them from OSH park if you don't want to etch them yourself. They are better and cheaper than the adaptors you can get on evilbay ��

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  6. Mark it....just finished...Fired it up and it worked first go. I'm surprised considering how hung over I am. I built it on perf.

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  7. Which smd is used in place of the j201 and will the results be the same?

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    Replies
    1. MMBFJ201 is the SMD equivalent. Results will be the same as through hole J201s (possibly better considering the inconsistency of through hole J201s available).

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  8. i cant find 1uf non polar, can be subtitute with 1uf elco? thanks

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    1. You should be able to. For the 1uF directly above Q6 the positive side should connect to the trimmer next to it, and for the 1uF to the right of Q6, the positive side should connect to the middle pin of Q6 (the source).

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    2. finally i can find the caps. doesnt works with elcos. works fine. beautiful overdrive. thanks

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