ES336 Wiring Harness By JEL Gibson or Epiphone 550k Centralab Spec Pots Vitamin

10 Day Build and Test Time

Jackson Electronic Luthier ®

525k ohm Ω SHORT Shaft

ES336 ® Type Wiring Harness 50s Style Wiring Harness

CTS 550k Potentiometers SHORT Shaft Audio.


Upgrade Wiring Kit Rare Spraque® Vitamin Q PIO .022uF Caps Centralab Spec Pots 550k Pots Gibson® ES-335

Masterpiece of Sprague® and in the Lineage from the Bumblebee. I have them in my ES-335. The tones are unbelievable. This is a Harness for the Very Serious Guitar Player who is a Tone Chaser.
All Materials assembled as Vintage Wiring Vintage Volume.

Sprague® Vitamin Q's are among the highest quality paper in oil capacitors around. Hermetically sealed metal body with glass ends. The oil used by Sprague® in Vitamin Q's is a proprietary blend that makes it unique among paper in oil caps. .022 is common value in Gibson® and Gibson®-style guitars using Humbucker pickups. Highly sought after and hard to find.

When Only the Very Best is Good Enough... ©


All Harnesses are Individually Serial Numbered and Signed.


  • Wired with 20 AWG Bus Wire
  • Comes with Complete Instructions

    Build is a 5% Tolerance Build which produces superior tone than a 10% build tolerance.

  • Many Builds are 10% Tolerance and some are even 20% Tolerance

Centralab Spec Pots 550k (The Holy Grail of Pots) and Capacitors, as well as all materials used, Come With Complete Test Reports and Specifications.

The Vitamin Q Capacitors (The Holy Grail of Capacitors) are 0.022uF at the neck and .022uf at the bridge.

Built to Gibson Wiring Spec. with Accurate Details.

The Harness is Tested Using Advanced Audio-Metric Software feed to an AC30 HW Vox® Amp.


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