Monday, 25 May 2026

MXR Phase 90

 This one has been requested a lot but I never ended up with a layout that left me satisifed. But now I think I got it. I also included two mods; Script/Block swith and 2/4 Stages switch. 2N5952 J FETs is nearly impossible to score nowadays,, good subs would be 2N5485 or 2N5457 and possibly others. Just mind the pinout.


 

7 comments:

  1. Thank you for showing us this project! It's great! Could you please upload the schematic to guide us?

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    Replies
    1. I used this schematic as a guide:
      https://docs.pedalpcb.com/project/XCPhase-PedalPCB.pdf

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  2. It's a shame there's never seemed to be a schematic of the phase 90 that allows you to tune jfets. They're not so easy and cheap to get these days, and matching four otherwise the effect doesn't work correctly....

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  3. I'd love to have a crack at this...

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  4. You can tag it. Verified. I had 10 2N5952s and luckily had 4 that matched. Had to order the 15uF elect caps and 250k trimpot. Just gotta find the happy spot with the trimpot and it was good to go. Works great with my bass.

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