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30/09/2014

Chopped Boss OC-2

I've finished my Chopped Boss OC-2 build. When it comes to octavers nothing can beat the tracking on a digital one, but for a DIY project this is one of the best out there. If you want to build the full version go to Sabro's blog, if you also want an octave up you can build de madbean's lowrider which is a Pearl OC-7, but if you are going to use it with a bass probably you don't need more than the chopped OC-2.

As this only have two knobs I refused to use anything bigger than a 1590B and to do so I have to draw my own layout. Its based on the adapted schematic by Ben Milner which chops the second octave down. To keep the layout compact and 1590B friendly I had to reorder the opamps used in the LM324 and use a couple of shared holes.

I'm starting to like the sinthy sound it has.


And this is how my boxed OC-2 looks like.









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6 comments:

  1. raul zanardo05/03/2016, 20:01

    Hi! O made this one and it work great, but I'm getting some inconsistency on the octave, like, the lower string gets a no good octave, the rest of the string play great (I use C standart tuning). Is there some adjust I can make to it for the octave down to play better on the lower string?

    ReplyDelete
  2. Marc-Andre30/12/2016, 16:51

    I built this and have the same issue as Raul. The Octave effect will drop out (or mis-trigger) on held notes on my bass (passive pickups). How can I fix that?
    Marc

    ReplyDelete
  3. Piergiorgio12/09/2017, 02:02

    I've built this scheme 2 times and both times it seems gnd and +9 are in short circuit. I measured resistance between + and - and it says 10kohm, a bit too low for this circuit I guess. Can anyone help me with this?

    ReplyDelete
  4. Unknown06/02/2019, 10:18

    Can we get a schematic for this?

    ReplyDelete
  5. andrew27/04/2020, 16:54

    This comment has been removed by the author.

    ReplyDelete
  6. plague doc24/03/2021, 15:46

    This comment has been removed by the author.

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