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Wednesday, November 25, 2015

Catalinbread Formula No. 5

The Formula No. 5 is a 5E3 Tweed Deluxe amp emulating overdrive pedal. It's essentially 2 JFET stages (very similar to the AMZ Booster) with the Tweed Deluxe tone and volume (in this case gain) controls in between. A master volume pot is added at the output for more control. Here's a great demo of this pedal from Just Nick, comparing it to an original Tweed Deluxe.



On the PCB I've added extra +9v and ground pads in case you build this with the DC jack at the top of the enclosure. 

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12 comments:

  1. GuilhermeNovember 25, 2015 at 5:16 PM

    Now this is the most amp-like (and I hate that definition) pedal I have ever build, sounds amazing. There's a mod that involves adding a switch to take out one resistor and add gain, just google for it, I recomend it, sounds a lot like Neil Young cooking the tubes

    ReplyDelete
    Replies
    1. DanNovember 25, 2015 at 7:54 PM

      It's the 2m2 next to q1. just short the connection.
      FYI tagboardeffects recommend switching it out with a dpdt for some reason. Use an spst and enjoy the noise when it supercharges the gain.

      Delete
  2. UnknownNovember 28, 2015 at 10:03 AM

    can i use j201?? i can't find any 5457

    ReplyDelete
    Replies
    1. Effects LayoutsNovember 30, 2015 at 9:20 AM

      Definitely socket and experiment. I would think the J201 would work ok.

      Delete
  3. constantineaudioDecember 3, 2015 at 12:01 PM

    Its working great. Thank you

    ReplyDelete
  4. UnknownJune 20, 2016 at 3:56 AM

    works great, really bassy tone with my strat. i use it after a green russian big muff. nice

    ReplyDelete
  5. UnknownNovember 3, 2017 at 7:55 PM

    Help please needed.
    made this twice on vero now and once on a pcb and got same result every time,nice clean sound but no gain,changed jfets pots etc same result,cant seem to get to the bottom of it.

    ReplyDelete
  6. UnknownJanuary 28, 2018 at 12:35 AM

    Turns my Vox AC4 into Tweed heaven with the stomp of a switch, noiiiiiiiice

    ReplyDelete
  7. UnknownNovember 8, 2021 at 7:24 AM

    The 47pf should be 470pf,connected to tone 3,https://www.freestompboxes.org/viewtopic.php?f=7&t=9373&start=180#p135930

    ReplyDelete
  8. PeteZipardiAugust 16, 2022 at 3:02 PM

    I originally built this as the layout to use with my Fender J-Bass, but it had too much gain for what I wanted to use it for; even at the lowest gain setting it was a little too dirty. I just swapped the JFETs and like it a lot more. Based on some info in this article: http://www.runoffgroove.com/fetzervalve.html, I thought using JFETs with higher Idss values might lower the gain, and it seems to have worked. I used J211 for Q2 and Q4, and 2N5458 for Q1 and Q3 (I would have used all the same, but those were the only JFETs I had on hand with higher Idss than 2N5457s). It actually now sounds really close to a TS808 I made from this site with bass mods from BYOC, but the Formula 5 sounds a lot less compressed than the TS808, which I like. Cool! Thanks Effects Layouts for making my life better!

    ReplyDelete
  9. Percy HornickelFebruary 14, 2024 at 5:42 PM

    I'm trying to find the Formula 55 layout somewhere with no luck, I hope to see this one in here soon.

    ReplyDelete