G&L tech resources: Wiring harnesses


The Cavalier-E has a less complicated wiring harness compared to the active F-100. Just the presence of a LM4250CN based preamp and a MTA106D 2-way mini-toggle to allows one to switch between high-impedance and low-impedance without coloring the sound, i.e. no changes in volume and/or tonal spectrum occur. Although it is hard to read the values of all potentiometers mounted on a black wrinkle powder-coated control panel with the preamp in place, this sketch by Gabe Dellevigne in the Guitars by Leo Gallery helps out. As expected, the volume control is a CTS 250kΩ Audio Taper potentiometer with a 20pF ceramic treble bleed capacitor. The treble cut in the PTB tone stack is achieved by a 250kΩ Audio Taper pot with a 22,000pF (.022µF) cap between pickup selector and pot, whereas the 1MΩ Reverse Audio Taper pot for the bass cut has a 2,200pF (.0022µF) treble bleed cap, soldered between the signal lug and the wiper, and is in series with another 2,200pF (.0022µF) cap from the wiper to ground. Note that the control panel shown below is covered by design patent D280,640, for which Leo filed on May 23, 1983, around the same time the Cavalier was brought to market. It differs from the unfinished panel for the Nighthawk/Skyhawk shown here only by the additional hole needed for the preamp toggle switch.