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, October 1, 2019

EarthQuaker Devices Plumes

Today's layout is the EQD Plumes. It's based on the Tube Screamer but with a load of tweaks, including the usual BJT buffers replaced with op amp buffers, selectable clipping, and a charge pump to provide a bipolar supply. Should fit nicely in a 1590B.





Here's the schematic as requested:

28 comments:

  1. Thanks a lot for posting!
    Can you provide the schematic?
    Thanks in advance

    ReplyDelete
  2. is it possible to use lt1054 for the charge pump?

    ReplyDelete
  3. Replies
    1. This comment has been removed by the author.

      Delete
    2. I fixed it. That's why they're correct now. lol

      Delete
    3. yeah, i noticed it the other day and was going to mention it but i see that you corrected it now. by the way,i built it and it works perfect so you can VERIFY it.

      Delete
  4. Cutoff frequency of the first gain stage is a bit weird. If my calculator is right it's 1.59khz and that is far from tube screamer type of sound. Does this mean that only frequencies above 1.59khz will get full boost or am I getting something wrong?

    ReplyDelete
  5. I have a Plumes on hand to compare to my build using this schematic and it is way brighter than the Plumes. To get them to sound similar I need to turn the Plumes tone all the way up and the and this builds tone almost all the way down. Any suggestions on fixing this?

    ReplyDelete
  6. How do I add a 3rd diode on mode one?

    ReplyDelete
  7. Any suggestion on how to mod it for use with (5 string) bass guitar? Would changing C2 with an upper-value cap suffice? (If I am not wrong C2 seems wo work as a hi-pass filter in combination with R5). Should I also increase values of input/output caps? -thanks in advance-

    ReplyDelete
    Replies
    1. The general rule of thumb for making a circuit more bass friendly is increasing the cap values in the audio path by 10x. For example, use a 330n instead of the 33n for the input cap.

      Delete
  8. An alternative for type w for tone. Here in Argentina you can't even find it, jajaja. Thanks for the hard working.

    ReplyDelete
  9. @Effects Layouts The two 56pF, I only have 68pF available. If use them instead will there be a huge difference in sound?

    ReplyDelete
    Replies
    1. Not a huge difference, no. You probably wouldn't be able to really hear any difference at all...

      Delete
    2. #Effects Layouts, can I use TC1044 as direct swap for the MAX1044 here?

      Delete
  10. @Effects Layouts, can I use TC1044 as direct swap for the MAX1044 here?

    ReplyDelete
    Replies
    1. It works but too trebly and I can hear the full distorted and compressed sound slightly in the background. Even when gain is almost down to zero. What cap do you think needs to be changed?

      Delete
  11. Thanks for posting this! Built mine though and it's quite bright which I saw someone else who had that issue--any advice on fixing that?

    ReplyDelete
    Replies
    1. Mine too. It’s too bright and I noticed that it’s too loud. @Effects Layouts any advice on what to change?

      Delete
    2. Solved! R4 here should be 4.7k instead of 1k. (Between 100n and ground) https://forum.pedalpcb.com/threads/greengage-overdrive-too-bright.1490/

      Delete
  12. Hey, Dave told me that replacing the 47nF under the tone pot should fix that too. Made it a bit chunky and fixed the bright issue. I found 220n-330n fixed it. 470 was too much for me.

    ReplyDelete