Thursday, 2 June 2016

Valve Wizard U-Boat

This is a layout for TH Custom Effects' version of Valve Wizard's sub-octave pedal.
Here is the link to their website with more infos about this project.
Here is the link to Valve Wizard's original circuit.
You can also find a verified hybrid layout (SMD/Vero) by Induction in our Forum/Contributions section.



17 comments:

  1. Does SW 1,6 amd SW 3,4 mean that these contact are connected with each other?

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  2. It does. They are connected.

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  3. Great! Thanks Alex!
    Looking forward to finally building this one...

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  4. Yup. This one may be tagged.

    Decent sounding thing indeed.
    +m

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    1. And now that i've played with it for a while, i do think it's better than OC-2. And with that, better than most analog down octaves.
      +m

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  5. Hey Mirosol does this do that flutter that the boss pedal does? Terrible demo with chorus on it sounds like it does but chorus could be what i am hearing . I guess i am wondering if its more like a polyphonic micro pog or not. Those dont do it. The tender octave doesnt either. I want to build one if it doesnt do that shiummer flutter thing the boss pedals do i have a pitch shifter ps-3 and its so annoying ha ha

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  6. Thanks for posting this. I wanted to build one for a long time, and now finally have. Valve Wizard stuff is great, the sub octave on this is way better than the mxr blue box or arion octaver.

    On my build used an ne5532 instead of lm833. Have some lm833 coming my way in the mail, will compare when they get here.

    I am having an issue, in that there is a lot of high-frequency noise in the clean signal. If I crank the mix up, it's fine- the octave down signal is clean- but it is very noticeable at 50% mix and below. I've switched all of the ICs out, reflowed all the solders, scraped between the strips. From looking at the schematic and the layout, it seems the problem I would be having would be between the tl074 and mix 1, which is a straight shot. I'll check one more time for shorts around there when I get a chance, but was wondering if anyone had any other ideas.

    Thanks!




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    1. I wonder if my batch of ti cd4013be's could be to blame. My blue box was also pretty noisey. Is there a better/more appropriate 4013 to use?

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    2. Should really use an LM833 for this project.
      If you use something else, you need to add a 10M resistor between pin 5 and 8.

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    3. LM833 still have not shown up, but I will use one when they do arrive. ne5532 did work well, tracked better than any other octaver i have tried, and is not part of the clean signal path (which is where my problem is). interestingly, when i put it on the pedalboard between a few buffers, the noise went away. Guitar player 'accidentally' took it home with him, so i might need to build another...

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    4. did you ever resolve that high frequency noise issue? i'm having the same thing happen with mine and i'm using the 833 too. I also notice that sometimes mine jumps between the sub octave and octave when i'm holding a note. is this normal (related to tracking?) or is there something else afoot in my build?

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  7. ok, I tried it with LM833. Not much difference in tracking, and I may be imagining that it is a bit more distorted than the ne5532. But not in a bad way.

    This is a great octaver. If I build another I may try to boost the clean signal a bit to get around a small volume dip at the settings i like to use, but that's really not a big deal.

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  8. Hi everyone!
    Does anyone know what Track knob for?
    And what function has 100k trimpot?
    Thanks.

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