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.

Tuesday, February 27, 2018

Vertex Steel String

Here's a relatively new effect from Vertex–the Steel String Clean Drive. It's supposed to sound like a Dumble amp and is 2 muamps going into a BMP tone stack. Schematic can be found here.




More progress with the tutorial. Actually wrapping up the DIYLC portion before moving onto the Photoshop bits.


17 comments:

  1. Hell yeah, a simple Dumble style OD! Awesome

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  2. Tag it and bag it, this one is verified. Awesome pedal.

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  3. Will this work of the bat without being able to trim the transistor drain voltage? and how does one know which type of transistors and capacitors to use?

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    1. Because the transistors are in a muamp set up they should work without biasing. If it doesn't work, it's probably more likely an error elsewhere in the build, or transistors that are really out of spec. Transistors are J201s and caps are whatever your preference is.

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  4. thanks for this great laout!
    my build sounds great, has plenty of output volume, but is has really less gain!
    do you think itś possible to increase gain? ( instead of a booster in front of it)

    (sorry for my awful englisch, i am from austria! holaredulieh!!)
    best greetings
    bluesanderl

    ps: can hardly wait until the next layout is posted !!!

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    1. Hello my dear friend
      this pedal is designed for little gain, you can see in the reviews that the manufacturer advertises on youtube. It is a transparent overdrive simulating the valve amplifiers.

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  5. Hi same problems for me more gain will be perfect

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  6. very plentiful of volume but little gain

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  7. I would like to know if you have how to make the layout available

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  8. For more gain you can decrease the 10k source resistors

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  9. Beautiful layout! Would love to know what's under the hood of the ultraphonix in a form of a layout around here! ;)

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  10. Puedo sustituir los j201 por 5457? qué tipo de modificación adicional se le debería hacer al circuito ?

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  11. Hi everybody! I'm new here. Has anyone tried to build this pedal using another transistor than the J201? MPF102 maybe? I know MPF102 gain is lower than J201, but, would it work? Can someone help me?

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    1. The MPF102 might work. Definitely use sockets in case they don't. If it were me, I would go with MMBFJ201s (SMD package) and converter boards.

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