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Capacitor Location on Humbucker Mod

Discussion in 'Tele Home Depot' started by choosebronze, Mar 4, 2010.

  1. choosebronze

    choosebronze TDPRI Member Ad Free Member

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    Hey folks... I've been reading these forums for a long time, all your knowledge is so helpful. I'm finally ready to ask my own question though...

    Picked up a standard MIM Tele real cheap. I'm gonna drop a humbucker in the neck spot. I've been doing a lot of studying up on tele schematics to try and figure out how to wire this thing, but I'm hitting a snag.

    I'm sure you guys know this, but on the standard tele, the capacitor is between the volume and tone pots. Like this:

    [​IMG]

    However, on the Squier SH tele and the Seymour Duncan schematics I've found for a humbucker in a tele, the capacitor is ONLY on the tone pot, like this:

    [​IMG]

    I'm wondering if it's that way for a reason. AKA if I have to do it that way, or if I can leave the capacitor the way it is.

    Thanks so much.
     
  2. funff

    funff Tele-Holic

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    Look carefully, it's the same wiring. One end of cap goes to the centre lug on the tone pot and the other end goes to ground - in both diagrams - albeit by different routes.
     
  3. paulskirocks

    paulskirocks Tele-Holic

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    It's the same difference whether the capacitor goes to the volume lug, which is grounded, or to the straight to the tone pot ground...
     
  4. cdhopkin

    cdhopkin Tele-Meister

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    It's just a different route to ground...electronically it's exactly the same circuit...nothing to worry about. When I wire guitars with a master volume/tone I generally use the second diagram but that's just a personal preference.
     
  5. originalmatthew

    originalmatthew Tele-Holic

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    I often wire mine like this. I THINK I can hear a difference in how the volume pot operates.
     

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  6. kidmo

    kidmo Friend of Leo's

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    It's exactly the same, just different?
     
  7. jefrs

    jefrs Doctor of Teleocity

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    Do draw out the electronic diagram, they are all the same thing.
     

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  8. originalmatthew

    originalmatthew Tele-Holic

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    yep, basically they are. In my diagram, the pickup signal passes through the volume pot before any frequencies are bled off by the tone pot. Like i said, i THINK i can hear a difference in how the volume pot operates. Could be imagination. :)
     
  9. choosebronze

    choosebronze TDPRI Member Ad Free Member

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    Thanks so much guys. I've been playing forever but I'm new to the electronics end. Rookie mistake.

    Very helpful stuff. I can't wait to get her up and running!
     
  10. choosebronze

    choosebronze TDPRI Member Ad Free Member

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    Follow up...

    I figure this is as good a place as any to post a follow-up, since I've already got the attention of you electrical experts.

    I took out the neck single-coil, popped in the new GFS humbucker, soldered the green wire to the appropriate lead on the 3-way, and the black wire to the back of the volume pot. The red/white are soldered together as should be. (So I basically ended up with just a standard tele wiring scheme).

    The pickup IS responsive, so I know the green wire at least is in the right location... but there's now a horrible hum from the guitar. It's more of a deep hum and not a high buzzing.

    Just wondering if any of you experts have any ideas.

    Thanks again.

    Jared
     
  11. jefrs

    jefrs Doctor of Teleocity

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    It's not imagination. With the tone control after the vol, on the wiper, then as the vol is turned the resistance (now Ra + Rc) to the cap is varied too. This vol-acting-as-tone-control effect is noticeable when both pots are well rolled off.
     
  12. JCollins

    JCollins Tele-Holic

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    There should either be a bare wire, or a braided shield surrounding all the other leads. The bare wire or braided shield serves as a ground for the metal base and cover (if there is a cover). This must also be soldered to ground. That is probably the source of the hum.
     
  13. choosebronze

    choosebronze TDPRI Member Ad Free Member

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    Hey, Thanks Jim.

    Maybe I just don't know how to solder well enough. I've got the grounds from both pickups and from the humbucker shield all to the back of the volume pot. It's just a horrible deep echoey buzz.

    I guess I finally have to give in and take her into a shop. =(
     
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