- For J-Style models - Allparts Nr. EP-4129-000-ASMBLY - Switchcraft jack socket - 3x CTS 250 kOhm potentiometers - Sprague Orange Drop .047mfd capacitor - 30 cm each of black and white fabric-covered stranded wire - Jazz bass wiring diagram (English) - CRL (Centralab), CTS, Switchcraft, and Sprague are original parts for many sought-after vintage US guitars EUR 35.00 - See more - Buy online