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Thursday, September 14, 2017

Wampler Sovereign

Here's another Wampler take on the JFET mu-amp design. This one adds a op amp stage at the output and features a Big Muff-style tone stack. This one's pretty versatile and a great sounding distortion. Ian sent me his perf layout of this one and I refined it a bit for what you see below, so a special thanks to him. Schematic can be found over on FSB.


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21 comments:

  1. UnknownSeptember 14, 2017 at 12:57 PM

    you are ... the stomp boxes prophet ``!!

    ReplyDelete
  2. Ian H NelsonSeptember 19, 2017 at 12:20 PM

    You can mark it verified! The only thing I changed was the Mids pot, I connected lugs 1 and 2 to the 33nf cap and lug 3 to ground. It should work either way though.

    ReplyDelete
  3. BoyetFebruary 25, 2018 at 8:30 PM

    I etched the pcb a while ago and just yesterday i populated the pcb. At first it does not fired up and after debugging i found our that the Gate on the Q2 is not connected on the pcb side. Now its working good.

    ReplyDelete
  4. UnknownNovember 23, 2018 at 7:44 AM

    Any schematic and parts list for this one?

    ReplyDelete
  5. FranckyDecember 5, 2018 at 8:05 AM

    Hi David, how are you ?
    What job do the 50k trimmer exactly ?
    How i have to adjust it ?

    Thx

    ReplyDelete
    Replies
    1. Effects LayoutsDecember 5, 2018 at 9:22 AM

      It's biasing Q5. Set it so you get about 4.5v on the drain and then adjust by ear if necessary.

      Delete
  6. FranckJanuary 1, 2019 at 8:40 AM

    ha ok i understand now why i have this sound like very compressed !!! :)
    Ok thanks for always respond us ...

    Franck

    ReplyDelete
  7. FranckJanuary 1, 2019 at 11:49 AM

    yes works fine now !!!

    ReplyDelete
  8. UnknownJanuary 4, 2019 at 5:36 PM

    is there a schematic to this? that would be nice, thanks!

    ReplyDelete
  9. MilanFebruary 21, 2019 at 7:27 AM

    Verified, but it haven't that amount of distortion what i expected from yt demos. Anybody have similar impression? Q5 biased on 4.4v

    ReplyDelete
    Replies
    1. ArielMay 23, 2019 at 6:13 PM

      The same thing happens to me, it's like a soft overdrive

      Delete
  10. ArielFebruary 23, 2019 at 1:47 AM

    How about the Dracarys? Is there any chance of seeing it here? it would be great!

    ReplyDelete
  11. gs1965March 9, 2019 at 9:00 AM

    Good day to all. Refer to the diagram indicated in the top of the article is currently not available. Please tell me where else to find the scheme.

    ReplyDelete
    Replies
    1. Effects LayoutsMarch 12, 2019 at 3:41 PM

      Haven't found the schem anywhere else, and FSB is down. Hopefully it'll come back...

      Delete
  12. UnknownMarch 4, 2020 at 3:52 PM

    Fantastic. Super sound. Like a good amp. I used 100k for biasing and had some problems. Use 50k for fine biasing. Adjust sound just before compressing. Good luck.

    ReplyDelete
  13. UnknownFebruary 10, 2021 at 12:24 AM

    Hi! What is the voltage measurement from ground to drain to set the trimmer resistor? Thank you

    ReplyDelete
    Replies
    1. UnknownFebruary 10, 2021 at 9:36 AM

      Got the answer from previous comment ... thank you

      Delete
  14. UnknownFebruary 10, 2021 at 9:45 AM

    Would there be any problem if I use electrolytic cap nonpolar to 1uF ...or mylar?

    ReplyDelete