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Monday, August 17, 2020

Spaceman Atlas III

Hope everyone's staying safe and healthy. Today's layout is a unique preamp booster from Spaceman Effects, the Atlas III. It uses some FETs I'd never heard of in conjunction with a couple low gain silicon BJTs (use something in the 175-225 hFE range). The switch controls the phase of your signal (it's internal in the original). Schematic can be found here for reference.

Also, I updated the Make a Difference page on the website to include a few funds working to help in the aftermath of the Beruit explosion. It's killed well over 150 people, injured 6000 and left over 300,000 people homeless. If you can, do some good, offer some home and help out some people who are really hurting.




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13 comments:

  1. FernandoAugust 17, 2020 at 9:53 AM

    depletion mode MOSFETS, just like the ones used for the Openhaus/Lighthaus pedal. hard to come by around here.

    ReplyDelete
  2. PetercAugust 17, 2020 at 1:44 PM

    Not sure where you are, but RS Compnents have them. Code is 829 3250. They are designed for high voltage circuits up to 500v. https://docs.rs-online.com/c5f9/0900766b8137e737.pdf

    ReplyDelete
  3. ZZOYDAugust 17, 2020 at 4:09 PM

    Yes, i used couple with Openhaus/Lighthaus pedal too, here is deficite mosfets. & 2n7000 I know will not work there!

    ReplyDelete
  4. DeeAugust 17, 2020 at 5:28 PM

    It works! Used PN3565 for the NPNs and made the 180nFs out of 100n and 82n caps.
    surprising that both sides of the phase switchs are useable. also I tested it after drive and it doesn,t distort. It the same distortion only louder.

    ReplyDelete
  5. Michu_PolarAugust 17, 2020 at 7:34 PM

    Brother, everything you do has worked excellently, I am very grateful and I congratulate you for everything you do for us, brother I look forward to this project, the Space spiral

    http://guitar-fx-layouts.42897.x6.nabble.com/Earthquaker-Devices-Space-Spiral-with-Pseudo-Random-Modulation-td48668.html

    http://tagboardeffects.blogspot.com/2020/04/earthquaker-devices-space-spiral.html?m=1

    https://www.pedalpcb.com/product/darkriftdelay/

    ReplyDelete
  6. Muumi6August 19, 2020 at 3:09 AM

    FB means ferrite bead? What kind?

    ReplyDelete
    Replies
    1. AnonymousAugust 20, 2020 at 7:22 PM

      I have used a bead like this one for my Spaceman builds.

      https://www.taydaelectronics.com/ferrite-components/ferrite-beads/axial-ferrite-bead-76-ohm.html

      Delete
  7. Ricco SeixasAugust 30, 2020 at 5:40 PM

    I have a request, could you create a layout for the multiplex delay jr?

    http://tagboardeffects.blogspot.com/2015/12/1776-multiplex-jr.html?m=1

    Thanks from Brazil!!!

    ReplyDelete
  8. EETFUKSeptember 6, 2020 at 10:35 PM

    I have a question!!
    In aluminum cap, small white section is - or + ??

    ReplyDelete
  9. Mark16September 11, 2020 at 7:53 AM

    - ve

    ReplyDelete
  10. DIGI2TSeptember 29, 2020 at 12:39 PM

    Thanks for putting these Spaceman Effects veros out. I used to have more time to do them in the past, but tracing for the Dead End FX projects takes up most of my time these days. Cheers!

    ReplyDelete