Friday, 11 November 2022

MXR M109 Six Band Graphic Equalizer

 This one was an old request.

Schematic is avaiable HERE.


 



11 comments:

  1. Hey Anders, I've been on a compressor kick. Do you have any interesting compressors kicking around in your files?

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    1. Definitley not an expert when it comes to compressors. I do have a bunch of unfinished layouts in some folders. I'll upload them when they are done.

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  2. Hi, I am requesting The Electric Eye Audio Mud Killer, Death by Audio Exploding Head, VFE Klein Bottle, and a simple Parametric EQ, I know the latter two have schematics floating around the internet. If unable to acquire I can send my copies if need be. Thank you for your time and this great site.

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    1. +1 on the klein bottle but we need the pic microcontroller ig

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  3. I see 41 cuts and 23 links. I am not inspired with confidence given my recent failures.

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    1. Yes, that is correct. The notes are updated.

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  4. It is verified with the following corrections:
    move 330k to n16 for vb to work, should be at 5.1-5.5v now
    move 3k2 pot lug 2 to j23
    move 1k2 to j21
    insert cut at j22

    I used b100k sliding pots, boost jumps drastically in the upper 20% of the pots, so u might wanna try the w50k's as suggested in the layout.for a finer frequency tuning. Cheers.

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    1. Thanks crissip!
      The layout is updated and tagged.

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  5. just trying to build this today and it didn't work. I have built it like the vero pic stated. I noticed that the updates that crissip made were not updated to the pic. So I did them, but with no luck. the only thing I omitted was the 330k to n16 (I'm not sure how that would change anything because it is currently located at n15). any ideas?

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  6. This comment has been removed by the author.

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  7. just boxed it up and came here to give it a praise. really versatile (can handle bigger signals at higher voltages 12v and up)

    Thanks for the layout!

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