alternative control schemes for a 4 hole passive PJ 5

Discussion in 'Pickups & Electronics [BG]' started by 4Mal, Jun 20, 2020.

  1. 4Mal

    4Mal Gold Supporting Member

    Jun 2, 2002
    Columbia River Gorge
    I'm thinking about making a currently active PJ5 (A Mike Lull) passive.

    My recollection is that the 62 J wiring of stacked Vol and Tone for each pickup is problematic due to interaction...

    Is there an effective circuit for Vol, Vol, Tone and... maybe bass rolloff or mid scoop ?

    What I absolutely have no use for is a pickup selector switch and I vastly prefer not a 'dead' knob ... though that may actually be the most practical and call it after VVT
  2. 4Mal

    4Mal Gold Supporting Member

    Jun 2, 2002
    Columbia River Gorge
    Hmmm. A maybe a Lawrence Q-Filter on a switch ? Does this approximate a mid scoop ?
  3. honeyiscool


    Jan 28, 2011
    San Diego, CA
    Master volume. Blend (or a switch). Treble roll off. Bass roll off.

    The reason why I prefer a switch vs. a blend, especially on a PJ, is that backwards volume pots load your signal in a way that regular volume pots don’t. You’ll always have one pot loading then other pot in a multiple volume pot situation.

    If you want multiple volume pots with properly switching of pickups, you can always use a VVT with a switch, too, but making the volume pots regular volumes like a Les Paul and not backwards volume knobs like a Jazz Bass.
  4. 4Mal

    4Mal Gold Supporting Member

    Jun 2, 2002
    Columbia River Gorge
    Hmmm. Maybe I need a Les Paul wiring diagram
  5. sikamikanico


    Mar 17, 2004
    A simple thing that I find very musical is a cap selector switch (like Tonestyler, but you can make your own much cheaper). You can wire it in place of the cap for the tone control, or in parallel with the tone control (as a separate control). I particularly like what small caps do to the character of the pickup(s).

    Re: Q-filter, my understanding is that yes, it is sort of a mid cut control. It also seems to raise the resonance frequency. Some discussion and diagrams here. Some folks on TB really like them, so it’s definitely a contender. But it can be done with a switch on the tone control, leaving the 4th hole for something else.

    Bass cut is an option, but I’m not sure if a PJ naturally has that much bass to cut. Perhaps if it was implemented with a series wiring (or even OMG, or “bass boost”).

    The fourth knob could also be a rotary pickup selector switch, I think Dingwall does that on some models (neck, bridge, series, parallel).