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, August 27, 2015

AmpTweaker Tight Metal

Got a lot of requests for this one. The Tight Metal is an over the top crunch machine for metal players. It has 2 effects loops, which not everyone will want. So just jumper those pads if you don't want that feature. The Gate pot is an internal trimmer, but I thought it might be useful off the board. This effect can be run off either +9v or +18v, and you should be able to fit this in a 125B.




49 comments:

  1. Should there be a 22uF to ground between Tone 1 and 10K ? every other schematic that I have looked at for this pedal has it.

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    1. The 22uF cap you're talking about was left out. Doesn't go quite where you said, but in the ball park. Thanks for catching that. The layout has been updated.

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  2. no body verified this ? is it ok ?
    this is good.

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    1. No one seems to have verified it yet. But I've gone over it a couple times and it should be fine.

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  3. I built the pedal not long ago and posted the query about the 22uf above. The pedal is absolutely insane ! The volume really should be modified. I can't turn it much above 2 and it is just stoopid levels. Although I have been over my board, the schematics etc I cannot seem to get either the Thrash or the Gate to work at all.

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    1. I wanna build this pedal... This information is correct?

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  4. Replies
    1. Check out this thread on FSB:

      http://www.freestompboxes.org/viewtopic.php?f=7&t=22393&start=60

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    2. thank you, due to the christmas madness will find some time to do this stomp box next year ;)

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  5. I wanna build this bad*ss pedal, it work? I have been looking at the freestompboxes thread but there are a lot of different opinion and options? It's this one correct? Sorry for my bad english.

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    1. I've been over the layout several times and it matches the schematic, so you should be good to go.

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    2. The ground loop should be cut somewhere?

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    3. I dont hace the tl072 it will work a 4558 un this one?

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  6. Any chance you could do the tightrock too? :)

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  7. i think tight rock have same layout, just different value.. Right?

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  8. are u have pdf layout about this project?

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  9. All schematics I've seen have the 100nf/330R leading to "Thrash SW2" going to ground, with "thrash Sw1" switched in parallel. This layout just connects them to each other, but not ground.

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  10. The gate section also seems to be always jumpered. Those 2 10k's should not be touching.

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    1. Thanks for catching those errors. I've fixed them in layouts above and things should be good to go now.

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    2. That's an elegant and quick fix, thank you. Right now the vero layout still needs the Thrash switch part fixed, but I just grounded it.

      The updated layout is verified and gate works wonderfully. This is THE pedal for us metalheads, thanks again for your work.

      The Tight Rock can be built on this layout since it's a few different values (mostly where the Thrash switch is now) and a gain cut section that can be placed on a toggle switch.

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    3. Oh, on the FSB thread, they correct the 1.5k on the right between the 3.3k and 22uf as being 4.7k instead. It has a small effect on the tone section.

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    4. hello efects layout, good day, I have 2 layouts would like to share, as I send the info? excuse my English
      I'm from mexico and do not speak English
      I have the layout of a 3D stereo guitar simulator and berry barcus of the 3000th (for cello metal like Apocalyptica), all are verified

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    5. You can send them to me via the Facebook page/messenger, or via email (address is in general layout notes tab)

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  11. This comment has been removed by the author.

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  12. This comment has been removed by the author.

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  13. the gate isn't a internal trimpot its a dual gang pot(gain) which increases the gate at the same time you raise the gain great concept but doesn't work the best to be honest on the original so takingdoing it like this is much better

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  14. I just finished it .. works great but noise gate is very subtle..

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  15. Built a few different versions of this distortion but this one sounds the best for my ears.
    Fully verified.

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  16. TL074
    Pin 1 5.5v
    Pin 2 5.5v
    Pin 3 5.5v
    Pin 4 9.1v
    Pin 5 5.6v
    Pin 6 5.7 v
    Pin 7 5.7 v
    Pin 8 4.8v
    Pin 9 4.8v
    Pin 10 4.7v
    Pin 11 0.0v
    Pin 12 5.4v
    Pin 13 5.7V
    Pin 14 5.7v
    TL072
    Pin 1 4.7v
    Pin 2 4.8v
    Pin3 4.8v
    Pin 4 0.0v
    Pin 5 5.7v
    Pin 6 5.7v
    Pin 7 5.7v
    Pin 8 9.1v

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    1. i nailed it first try and i think it turned out really well! ill add a few pics tomorrow of the board and finished pedal

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  17. Gonna build this one next week! THANKS! Can you do the tight rock and the tight drive?

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    1. tight rock can be built on this pcb it's just a few caps and a resistor or two difference between the two


      check out the topic on FSB about the tight metal and towards the last few pages there is detailed explanation on the substituted values

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  18. Replies
    1. Yes. All layouts have a verified or unverified tag

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    2. And i can verify as i finished 3 days ago.

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    3. Also... please could you help me in decifering the tight rock mods please. That would amazing information to have on this page too.

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    4. thanks! but i was wondering about the 330r and the 100k that the pcb layout is different from the perf one? is the 330r connected to the 100k?

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    5. Oh you're right. That 330Ω resistor should go to ground. I've fixed the perf image.

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  19. Hi there. Really keen to give this one a crack. Does an image transfer PDF exist? Im not able to find one in the transfer image library

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    1. Don't mind me. Just found it in the misc folder as stated in the general layout notes.

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  20. Hi guys. Right, according to JOK3RX over at the fsb the values to change for the tight rock are the 100nf cap at the top right inbetween the 3k3 and the 330r resistors cap change to 22nf and the 330r change to 3k3 also.
    The 100nf cap difrectly below change to 47nf.
    And the 1.5k resistor below those linking to the 22uf cap is incorrect and should be changed to 4k7.
    Thats it guys. Tight rock away. This is verified by me and for a diagram the last page on the tight metal thread at fsb has all changes listed.

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  21. Do i cconnect a jumper fro send 1 to send 2 and return 1 to return 2 if i'm not going to include the fx loop in my build? Thanks

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    1. Yep. That's what it says in the description

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  22. Ccant seem to make the gate work 🤔🤔

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  23. What is 4733?
    Germanium or silicone diode?

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