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Originals have the Volume control as an internal trimmer, but I've moved that to a full sized pot for more control (and a newer version of this pedal has all 3 control externally as well, so maybe I'm on to something haha).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.



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12 comments:

  1. MattApril 4, 2017 at 2:31 PM

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

    ReplyDelete
    Replies
    1. Effects LayoutsApril 4, 2017 at 2:50 PM

      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".

      Delete
  2. IAMJX1985July 12, 2017 at 12:58 AM

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

    ReplyDelete
    Replies
    1. Effects LayoutsJuly 13, 2017 at 9:40 PM

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

      Delete
    2. IAMJX1985July 16, 2017 at 10:14 AM

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

      Delete
    3. Effects LayoutsJuly 17, 2017 at 12:06 AM

      It's in the Misc folder

      Delete
    4. IAMJX1985July 17, 2017 at 12:44 AM

      Nice nice! Thanks!

      Delete
  3. Timóteo CostaJuly 29, 2017 at 2:23 PM

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

    ReplyDelete
  4. Lucas MSeptember 19, 2017 at 5:42 AM

    Finally had time to build this one, I used a B50K dual instead of the C50K (seems to be hard to find this one) and it works fine.
    You can now tag it as verified, it's a really nice tool to fine tune the mids on bass!
    Thanks a lot!

    ReplyDelete
  5. UnknownOctober 21, 2018 at 1:56 AM

    I build it, works fine, but with low output. Got Anyone the same problem?

    ReplyDelete

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