G&L tech resources: Wiring harnesses

 
 

When Leo worked on the development of the ASAT Bass in 1989, one of his prototypes not only had similar Jumbo MFD pickups as the Broadcaster but even used a similar wiring harness with a CTS 250kΩ Audio Taper volume potentiometer with 200pF ceramic treble bleed capacitor and a 250kΩ Audio Taper tone pot with 100,000pF (.1µF) treble bleed cap followed in series by a 6.8kΩ resistor to ground. What harness one finds in an employee guitar could be a surprise. But this ASAT Signature ‘500’ employee guitar from April 1991 has the same ASAT Classic harness as found on the contemporaneous version of model as well as the modern day ASAT Special: 250kΩ Audio Taper volume pot with 200pF ceramic treble bleed cap, 250kΩ Audio Taper tone control with 22,000pF (.022µF) treble bleed cap, and no 6.8kΩ resistor anymore. Some models with hotter pickups deviate slightly from the ASAT Classic harness. This ASAT Custom from 1995, the ASAT ‘Junior’ from 1999, 2000 20th Anniversary, 2004 ASAT HB, as well as this 2010 ASAT Special Deluxe ‘Cowhide’ have the same volume control as above. But instead of a 22,000pF (.022µF) treble bleed cap, the tone pot is in series with a 47,000pF (.047µF) to ground. One might have expected the ASAT ‘Super’, also issued in 2004, to use the same. Surprisingly, one finds a mixture of the Broadcaster and ASAT Classic harnesses with the tone control having a 22,000pF (.022µF) treble bleed cap again but being in series with a 6.8kΩ resistor to ground. No other model produced later has this resistor. For instance, although this ASAT™Cat prototype built for Alley Cat Music in 2014 has no treble bleed cap on the 250kΩ Audio Taper volume pot, its 250kΩ Audio Taper push-pull tone control, complementing the 5-position pickup selector for additional pickup combinations, has the usual 22,000pF (.022µF) capacitor. The ASAT Classic Charlie Christian Ltd produced for Martin Music Guitar in 2014 has the standard ASAT Classic harness: 250kΩ Audio Taper volume pot with 200pF ceramic treble bleed, CTS 250kΩ Audio Taper tone control with 22,000pF (.022µF) treble bleed cap. But small variations are found even today. The Limited Edition ASAT Classic Bluesboy Semi-Hollow Okoumé w/Port Orford cedar top from 2017 has a similar volume control as all the guitars shown on this page. But lo and behold, it uses a 500kΩ Audio Taper tone pot with 22,000pF (.022µF) treble bleed cap soldered between signal and the wiper.

 

Other ASAT harnesses