# Two humbuckers with a three-way blade and a push/pull phase volume Canonical page: https://guitarwiring.app/wiring-diagrams/seymour-duncan/two-humbuckers-three-way-blade-push-pull-phase-volume Two humbuckers · Three-way blade · One push/pull volume (phase) Neck and bridge Seymour Duncan humbuckers on a three-way blade and one 500k volume. The volume's push/pull switch reverses the neck pickup's black and green leads, so with the blade in the middle, pulling the knob puts the two pickups out of phase. Drawing: https://guitarwiring.app/wiring-diagrams/seymour-duncan/two-humbuckers-three-way-blade-push-pull-phase-volume.svg (back of controls) ## Parts and values - Neck pickup: Seymour Duncan Neck Pickup; generic (Humbucker (four-conductor, Seymour Duncan colours)) - Bridge pickup: Seymour Duncan Bridge Pickup; generic (Humbucker (four-conductor, Seymour Duncan colours)) - 3-Way Blade Switch: 3 Way Blade; compatible example (CRL 3-Way Blade) - Volume 500k (push/pull phase): Volume 500k / Phase Switch; 500k; compatible example (500k Push-Pull DPDT) - Output Jack: Output Jack; compatible example (Switchcraft \#11) - Bridge Ground Wire: Bridge ground wire; generic (Bridge ground wire) ## Specific to this wiring - On each pickup, solder the red and white leads together and tape them off. - The neck black and green leads go to the two middle lugs of the push/pull switch; its outer lugs are cross-jumpered in an X so pulling the knob swaps them. - The push/pull lug nearest the pot on the black side goes to the volume casing; the top lug on the same side goes to the blade's neck common. - The neck bare wire goes to the volume casing, not through the switch. - The grey 'Solder' spot marks the ground (earth) connections; the bridge ground wire goes to the volume casing. - The source does not number the switch positions; the lugs are mapped by what they do (neck, both, bridge). ## Connections 1. Neck green → Push/pull right middle lug (wire, green) 2. Neck bare → Volume casing (shield, bare): Drawn grey, looping round the right side to the solder spot. 3. Bridge green → Volume casing (case, green) 4. Bridge bare → Volume casing (shield, bare): Drawn grey, running with the green. 5. Push/pull left lug nearest the pot → Volume casing (case, black) 6. Volume right lug → Volume casing (case): Lug bent onto the casing. 7. Volume casing → Jack sleeve (case, black) 8. Bridge ground wire → Volume casing (shield, black): 'Bridge ground wire' ends on the volume's solder spot. 9. Bridge black → Blade lower row, rightmost lug (common) (wire, black) 10. Push/pull left top lug → Blade upper row, leftmost lug (common) (wire, black): Runs across the top of the blade. 11. Blade lower row, first lug → Blade lower row, second lug (bridge, black) 12. Blade lower row, second lug → Blade upper row, third lug (bridge, black) 13. Blade upper row, third lug → Blade upper row, rightmost lug (bridge, black) 14. Blade upper row, rightmost lug → Volume left lug (input) (wire, black): Hops the bridge ground leads on its way down. 15. Neck red → Neck white (insulated, red): Neck red and white end in the taped joint at the upper right. 16. Neck black → Push/pull left middle lug (wire, black): Hops the blade wire on its way to the switch. 17. Bridge red → Bridge white (insulated, red): Bridge red and white end in the taped joint below the blade. 18. Push/pull left top lug → Push/pull right lug nearest the pot (bridge, black): One leg of the X jumper. 19. Push/pull right top lug → Push/pull left lug nearest the pot (bridge, black): The other leg of the X jumper. 20. Volume middle lug → Jack tip (wire, black): Hops the sleeve wire where the two cross. ## What each position does - Neck, knob down: Neck pickup (both coils). Source: Neck pickup, normal phase. - Both, knob down: in phase: Neck pickup (both coils) and Bridge pickup (both coils) in parallel. Source: Neck and bridge together, in phase. - Bridge, knob down: Bridge pickup (both coils). Source: Bridge pickup. - Neck, knob pulled: neck reversed: Neck pickup (both coils). Source: The neck's leads are swapped; on its own it sounds the same as knob down. - Both, knob pulled: out of phase: Neck pickup (both coils) and Bridge pickup (both coils) in parallel. Source: Neck reversed against the bridge: the phase switch. - Bridge, knob pulled: Bridge pickup (both coils). Source: The bridge does not pass through the push/pull. - Hum cancelling and phase describe the generic pickup models, not a measurement of any specific Seymour Duncan model. - Pickup resistance is not specified, so no numeric meter readings are given. - The source does not say which knob position reverses the phase; this follows the usual push/pull behaviour (pulled joins the middle lugs to the lugs nearest the pot). ## Check before plugging in - In each blade position, the meter across the jack should read the selected pickup, or both in parallel in the middle, with the knob up or down. - Knob pulled: the neck green lead should read continuity to the blade's neck lug and the neck black lead to ground. - Each taped red–white joint should read open to ground. ## Source Tinkercaster's own drawing of the Seymour Duncan diagram 2H\_3B\_1VppPH, revision 1. Not the manufacturer's artwork and not endorsed by Seymour Duncan. See also [all wiring diagrams]().