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Wiring Blend Knob into FX

Discussion in 'Effects [BG]' started by Unchain, Oct 23, 2005.


  1. Unchain

    Unchain I've seen footage.

    Jun 20, 2005
    Tucson, AZ
    I've built a few FX before, based of schematics online with a few mods, however my question is this: How can I add a blend knob so that I can blend my original signal w/ the effected one? Do I wire it like this (sorry, not sure how to do this, but top is T , bottom is B and connections are seperated by : )

    GRND : ORIGINAL : TO "LEVEL" & B1
    FROM T3 : EFFECTED : GROUND

    Is this is right, let me know however if I totally missed the boat, please correct me.
     
  2. Jazz Ad

    Jazz Ad Mi la ré sol Gold Supporting Member Supporting Member

    A blend knob isn't just a volume pot.
    It's actually 2 stacked volume potted wired backwards.
    So schematics are a bit more complicated.
    I'm pretty sure somebody's got schematics ready for you and will post them. :)
     
  3. Unchain

    Unchain I've seen footage.

    Jun 20, 2005
    Tucson, AZ
    I know that, that's why I had 6 connections. :meh:
     
  4. Basstyra

    Basstyra Commercial User

    Apr 3, 2005
    France
    CTO @ Two notes Audio Engineering
    Basically, Jazz Ad told all you have to know. 2 pots wired backward.

    Let's say input 1, input 2, output, and ground.

    Input 1 goes to a wiper, input 2 to the other. output goes to a extreme connector and the opposite on the second pot. Ground goes to the 2 remainings. It makes a cross.

    Replace the pickups by the 2 inputs, the jack by the output. There you have.
    [​IMG]
     
  5. Unchain

    Unchain I've seen footage.

    Jun 20, 2005
    Tucson, AZ
    Ok thanks, man. I had it right!
     
  6. Basstyra

    Basstyra Commercial User

    Apr 3, 2005
    France
    CTO @ Two notes Audio Engineering
    Ok, I just understood what you wrote. That's it, yep !

    What is "level", though ?
     
  7. Unchain

    Unchain I've seen footage.

    Jun 20, 2005
    Tucson, AZ
    The output level, control or volume. Wouldn't that be where it would go to? Or maybe not. :meh:
     
  8. Basstyra

    Basstyra Commercial User

    Apr 3, 2005
    France
    CTO @ Two notes Audio Engineering
    Well I think you should wire the blend before the volume pot. Because the blend would else be done between a normal volume dry and a full boost effected.
     
  9. Unchain

    Unchain I've seen footage.

    Jun 20, 2005
    Tucson, AZ
    Yep on my octave-up pedal I'm adding volume and blend, blend first. Thanks basstyra
     
  10. It's just one of those "I can't beleive no one makes these" things. It's virtually a must have for any bassist using effects.

    You're a legend Charlie!
     
  11. Unchain

    Unchain I've seen footage.

    Jun 20, 2005
    Tucson, AZ
    Oh, that looks cool! I might have to give cash to moosapotamus.
     
  12. Hey, Unchain! DIY, man! I could hook you up. But, If you're looking at building a Green Ringer, a ParaLooper should be a piece of cake for you. :cool:

    ~ Charlie