Saturday 7 August 2021

MXR Phase 45


 

15 comments:

  1. Built this today. Works great, thanks for the layout. I used a pair of 2N5457's (turned 180 degrees) and a 220k trimmer and it worked as it should. Phasing happens at a very specific point of the bias trimmer and the speed pot does its job.

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    1. Awesome! Really cool, thanks a lot. Tagged.

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  2. Built this evening with 2n5457s as above. Works great but i found hotter pickups(humbuckers and JM P90s) it was a little cruncy. Switched to J201s and iirc JRC4558s, now it works perfect. No crunch, just nice smooth phasing. Ive taken the bias off board but wasnt really worth it as the working range is so small. Another awesome layout! Thanks Fuzzhead!

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  3. Mod Suggestion! Make the bias control useful.(Id call it Voice or Shape)
    Bring it off board with a 220k potentiometer, but between lug 1 and the board add a 22k resistor and between Lug 3 and the board add a 330k resistor.
    This makes the whole pots sweep cover just the working portion.

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  4. Replies
    1. Nope. Definately 22 pal. Keep an eye out under the transparent componants. 10uf, 47nf, 3x10ks, 1m.

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    2. Got them! Thank you!🙈🤦🏼

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  5. This comment has been removed by the author.

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  6. Here it is!

    https://youtu.be/-jxwTNbwz44

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  7. Anders - I'm loving this more than I thought I would.
    Do you think you'd be able to look at that phase 90 with depth control? I've got some decent j201s at last!

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    1. I'll take a look but I'm not sure when I am able to start on a layout for it...:-/

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    2. Anytime is perfect 🙂
      Thank you

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  8. How can i add just a range/depth pot to this circuit? Anyone know where to solder it up?

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  9. It's easier to start with a deeper phaser (e.g. Phase 90) and tame it than to start with a relatively shallow phaser like the Phase 45 and try to juice it more. That said, there's a modded Phase 45 layout over at Tagboard that may be just what you're looking for:

    https://tagboardeffects.blogspot.com/2012/08/mxr-phase-45-modded.html

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