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Help!! 3 pickup and Bart BT circuit- turbo gecko 6 string!

Discussion in 'Pickups & Electronics [BG]' started by Brother Goose, Jun 27, 2020.

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  1. Jun 27, 2020 #1
    Brother Goose

    Brother Goose The Process IS the Reward! Supporting Member

    Dec 4, 2013
    Syracuse NY
    God Is Love
    TB hive mind!

    I am in the process of finishing a revamp of my warmoth Gecko 6.

    My objective is have a 3 pickup and 3 knob solution- prefer output on the front of bass.

    Here is my plan.

    Neck pickup - Bart Quad coil wired for reverse P

    "Sandwiched" Aguilar DCB in the bridge/musicman position

    Stacked BT (Bartoloni NTBT-918) running at 18v.

    I would GREATLY appreciate any suggestions for pot values and wiring diagrams.

    Here is my idea for the 3 knob layout

    Volume (push/pull- preamp bypass) Bart reverse P,
    Stacked volume/volume (Aguilar DCB),
    Stacked bass/treble

    Picture of bass right now- I'm going for a Ken Smith meets Bootsy turbo funk sound and hope the three volumes will give me the most control.

    Thoughts feelings? Thanks family!! IMG_20200627_115158.jpg
     
  2. Jun 29, 2020 #2
    Crater

    Crater

    Oct 12, 2011
    Dallas, TX area
    Since you're doing 3 pickups in parallel, I'd go with 500 k Ω pots to lessen the loading. Like most preamps, the pickups' signals are summed passively to a single input to the preamp (or output jack with EQ bypass).

    Bartolini supplies a diagram, however, they apparently only show a two-pickup blend pot setup. The pickup volumes would be wired similar to a J-bass: pickup hots to the center terminal, "0" terminal to ground, "10" terminals wired in parallel, then to the EQ bypass switch.

    Your layout doesn't have a master volume and won't have any tone control in passive mode. But you know that, right? :)
     
    Brother Goose likes this.
  3. Jun 29, 2020 #3
    Crater

    Crater

    Oct 12, 2011
    Dallas, TX area
    Not a pictorial wiring diagram, but a schematic. I wire the EQ bypass a little different than what's shown in the Bartolini diagram, either way will work. The bass and treble controls are part of the preamp (inside the 'magic triangle) and aren't shown.

    The diagram closest to this is the Bartolini diagram, middle one on the second page; I've just added the 3rd pickup and its volume control.

    Tri-pup-EQ-bypass.png
     
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  4. Jul 1, 2020 #4
    Brother Goose

    Brother Goose The Process IS the Reward! Supporting Member

    Dec 4, 2013
    Syracuse NY
    God Is Love
    This is great!

    In other circumstances I would def want to have a master volume or tone- but I anticipate running this bass fairly wide open and using the volumes to slightly attenuate.

    I've grown very fond of the 3 band eq and tone control on my Site basses and see that as the ultimate in sculpting.

    This bass is going to be a straight up face melter/Earth mover.

    I'll def follow your advice and source:

    500k p/p audio pot for neck- Bart
    500k stacked audio for Aguilar DCB vol/vol
    500k linear stacked for Bart Eq.

    If I can't find the stacked audio or linear 500k pot I may have move the output jack to the side.

    Updates to follow as I get closer to getting it done!
     
  5. Jul 2, 2020 #5
    eastcoasteddie

    eastcoasteddie

    Mar 24, 2006
    Brooklyn, transplanted to NoVA
    I believe the 500k pots are only for the passive section of the circuit - the volume pots.
    the BART preamp should retain its factory pots, which are B50k’s if I remember correctly?
     
  6. Jul 2, 2020 #6
    Brother Goose

    Brother Goose The Process IS the Reward! Supporting Member

    Dec 4, 2013
    Syracuse NY
    God Is Love
    I'm going to confirm w Bart today.

    Got the right push pull and stacked vol/vol pots on the way!