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.

Monday, April 3, 2017

EWS Bass Mids Control

Here's another one for the bass players. It's a pretty handy EQ pedal from EWS. Originals come in a 1590a, and sadly I wasn't able to duplicate that here, but it will fit fine in a 1590B with board mounted pots. Originals have the Volume control as an internal trimmer, but I've moved that to a full sized pot for more control (and a newer version of this pedal has all 3 control externally as well, so maybe I'm on to something haha). Here's the schematic for reference.



8 comments:

  1. hey bud, i'm wanting to do some cnc work for the layout drilling, can you tell me what your grid spacing is?

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    1. All the holes should be on a 0.1" grid. The 2 inner/extra holes for that 100n cap at the top of the layout are inset 0.05".

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  2. Thanks bro! i made one for myself.. but the only thing is, i didn't know the original size of the PCB...

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    Replies
    1. Check the Transfer Image Library tab at the top of the page.

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    2. Hello Sir, thanks for the reply. I've check the tranfer library but there is no EWS bass mids control folder

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  3. Hi. do you have the PCB or layout of tri-logic bass preamp ?
    thanks

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