August Mod Of The Month: Push Pull Volume Kit

For August, we’re talking about the Fralin Volume Kit, or Treble Bleed Circuit. The Volume Kit is basically a Capacitor and Resistor tied together to solve a simple problem on your guitar – loss in highs when you roll your volume down. On traditional volume pots (250K’s are the worst for this), when you roll your volume down, your tone gets darker. The midrange and bass is preserved, but your highs go right down the drain.

Some players actually like this, some don’t. This mod is a quick way to get the best of both worlds. Using a 250K Push Pull pot, we can wire up the Volume Kit and select it when we want to use it, and put it away when we don’t.

Here’s what we’ll need to preform the mod:

  1. 250K / 500K Push Pull Pot
  2. Fralin Volume Kit
  3. Soldering Iron with Basic Soldering Skills

How To Wire It Up:

This mod will take the place of your Volume Pot, so, follow the wiring diagram below and you’ll be good to go!


How it works:

  1. When pushed down, your signal is entering through lug A, but it ends there, as it doesn’t have anywhere to go.
  2. Pulling up, A & B and E & D are now connected, connecting the Volume Kit to your circuit.

If you want to reverse this, simply move the Connector Wires (two cream wires in the photo above) to Lugs C & F. This will remove the Volume Kit when you pull up.

We hope you dig it! Let us know what you think in the comment section below!

Written By:

Tyler Delsack

Tyler Delsack is the Manager of Fralin Pickups and spends his time editing and maintaining the website, designing graphics and ads, and making pickups. He's powered by Jazz Guitar, Vietnamese Food, Hiking, and Beer.

Author's Note: These blog posts are for educational and information purposes only. We do not offer custom wiring diagrams or wiring help or troubleshooting. For this, we recommend going to a local luthier or tech.


  1. Hello.
    About the issue “loss in highs when you roll your volume down” why not to try to avoid the problem instead of adding an additional system to compensate it?
    I mean, to my point of view, when we decrease the volume, we adda a serial resistance on the signal line. This resistance comes in addition with the Tone resistance, so decreasing the volulme has the effect to lower the tone frequency.

    Why not simply place the Tone before the Volume?

    1. In response to Le Chavilier Noir,
      The placement of the pots does not make a difference in regards to loading the signal down. When a volume or tone pot is on “10” or all the way “up” the pots resistance is what is keeping the signal from grounding completely. Turning the pot down lowers the resistance of the path to ground until there is no load, or a “direct to ground” path. Therefore there is a load, or resistance to ground even when the pot is all the way up. This load contributes to signal loss and the first part of the signal to go is the treble. This is why higher value pots sound “brighter”. The lower the pots resistance, the more signal is lost even when the pot is on 10.

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