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.

Wednesday, November 18, 2015

LM13700 to CA3080 Conversion Board

A lot of older circuit designs (DynaComp, Ross Compressor, etc.) use the CA3080, which is now obsolete and rather expensive. The LM13700 is essentially two 3080s in one chip, and much more affordable. Here's a conversion board to use the 13700 in place of the 3080. Use long header pins, mounted from the solder-side of the board. These can then be inserted into an IC socket in place of the 3080. I'm not the first to come up with the sort of board, but hadn't seen one on perf. So hopefully it will be helpful to some of you out there.


  1. could not find the transfer image in the library...

    1. Just put it in the Misc. folder. Sorry about that!

    2. many thanks brother!
      awesome as usual


  2. perform 5
    to replace
    IC of a small stone and do not work
    desconosco a little outline but cer seems that the pin 7 and 8 must not be omitted

    in the scheme of small stone pin 1 and 8 of CA3080 appear as buffers in the LM13700 those same buffers appear on pins 7 and 8 , I think (I'm not 100 % sure) that there is the problem

  3. Hopefully this one will get updated and verified, what great tool. It would be awesome to get a layout for SSOP to DIP Adapter 16-Pin Breakout Boards, since the SMT versions of certain chips (like companders) are cheaper and easier to get. I've been buying breakout boards from OSH Park, but it's always more fun to etch my own.

  4. Replies
    1. No, but it should work fine. And you might be able to get away without populating the resistors. Most effects that use the 13700 in place of a 3080 don't use them (if memory serves, haha).

  5. Tried this one on Keeley four knob compressor and it works well.
    I didn't populate the resistor though...
    I would recommend to socket the resistors to try with and without them on your specific build.

    Oh ! And the ready-to-print PDF has moved from "Misc" to "Utility boards".

  6. The resistors there are to generate a ground level to use it to bias the positive input of the second amplifier, in order to minimize the noise cross-talk.