Jazz bass series wiring without a switch

Discussion in 'Pickups & Electronics [BG]' started by jking138, Jul 16, 2017.

  1. jking138


    Oct 6, 2013
    So, this is something I've considered for a while now and I think it's time.

    I've searched but all the diagrams contain an S1 switch for series/parallel wiring. I'm not fussed about the switch, so how would you wire a straight series jazz? Or do you have to have the switch?
  2. 4StringTheorist

    4StringTheorist Supporting Member

    You certainly don't need the switch. If you want the pickups in series 24/7 then it'll act like one pickup. You'll only need one volume knob and one tone knob.
  3. jking138


    Oct 6, 2013
    So I attach both hot leads to the same point on the volume?
  4. DiabolusInMusic

    DiabolusInMusic Functionless Art is Merely Tolerated Vandalism

    I use a push/pull pot in place of switch but it can be done without the switch, just wire the pickups in series. Just find a P-bass wiring diagram and follow that for series wiring.

  5. 4StringTheorist

    4StringTheorist Supporting Member

    Solder the + of one pickup to the - of the other. This leaves one free + wire and one free - wire. Now just treat it like one pickup.
    David Jayne likes this.
  6. 4StringTheorist

    4StringTheorist Supporting Member

    My only beef with that diagram is that if you take the + and - seriously, it shows the pickups being wired out of phase. (That diagram connects the - of one pickup to the - of the other... leaving two free + leads) That's a no no.
    Marty Forrer and DiabolusInMusic like this.
  7. Killed_by_Death

    Killed_by_Death Snaggletooth Inactive

    courtesy of our own Walter_W

  8. jking138


    Oct 6, 2013
    Brilliant, thanks for the help. I was wondering about the + and - connections on the diagram
  9. jking138


    Oct 6, 2013
    So is this still using 2 volumes?
  10. Killed_by_Death

    Killed_by_Death Snaggletooth Inactive

    unfortunately I can't find a bigger copy of the drawing at the moment, but yes it's V/V/T

    the middle pot shunts the pickups output to ground when it's on zero
    and the left pot shunts the pickups leads together at zero

    This diagram works to have independent volume control of each pickup.
  11. That's bad wiring! Don't use that.

    Use a standard P bass diagram, and follow every detail precisely.
  12. jking138


    Oct 6, 2013
    Thanks, that would be useful.

    I think line6man is refering to the other diagram with the - to - connected
  13. There are four problems with that diagram.

    1. Out of phase pickups.
    2. The tone control is wired to cut volume as it cuts treble. When rolled fully off, the output will mute.
    3. The tone control is placed after the volume pot, where the impedance is supposed to approach zero, as the volume pot is rolled down. This compromises its behavior.
    4. The volume pot is wired backwards, with the wiper terminal varying input impedance on the pickups. You only do this when you have multiple volume pots in a circuit. The wiper terminal should always be the output in a scheme with one volume pot.
    4StringTheorist likes this.
  14. Killed_by_Death

    Killed_by_Death Snaggletooth Inactive

    ok, ok, I get it now, you were referring to Diabolus, who I have on ignore.
    I thought you were saying the WalterW drawing was no good & I was shocked, since I've used it twice & it worked great both times.

    I can see that problem with the treble cut acting as a volume on DM's drawing.
    strange to feed volume into the treble cut pot in series like that instead of in parallel
    eddododo and 4StringTheorist like this.
  15. Walter's diagram is indeed a useful one. It's popular, too.

    There is another diagram that he made, for one volume and two tones. As I recall, he suggests that one over VVT, these days.
    Killed_by_Death likes this.
  16. 4StringTheorist

    4StringTheorist Supporting Member

    I had a feeling you thought line6man was referring to your diagram. When I want electronics info on this forum, line6man and WalterW are two people who've earned a ton of trust from me.
    Killed_by_Death likes this.
  17. Killed_by_Death

    Killed_by_Death Snaggletooth Inactive

    Here's his other diagram, for the benefit of the OP:

    I prefer the V/V/T
    4StringTheorist likes this.
  18. jking138


    Oct 6, 2013
    What's the difference with this one? The writing is a bit small
  19. Killed_by_Death

    Killed_by_Death Snaggletooth Inactive

    4StringTheorist likes this.
  20. One volume and two tones, versus two volumes and one tone.
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