How to fix a guitar output jack - YouTube Click to view on Bing8:32How to fix a broken output jack in a guitar, bass, amp or most guitar pedals. Step by Step instructions.Author: MetalFlakeGuitarsViews: 51K Installing an end pin jack in an acoustic guitar - YouTube Click to view on Bing7:55Here are a few tricks and tools for installing an end pin jack in an acoustic guitar. *** Warning *** This video does not address creating the hole for the jack, but that is the riskiest part of the process. Only someone who knows Author: homebrewedmusicViews: 201K Permanent Installation Guide - Fishman PDF filePermanent Installation Guide Important! Install the Endpin Jack Tools • Soldering iron (30 watt max) • Rosin core solder • Wire strippers • #1 Phillips screwdriver • 1/2" open end wrench • 3/32" Allen wrench inside of the guitar once the endpin jack has been installed. Installing an under-saddle pickup on an acoustic guitar This beautiful guitar needs an under-saddle pickup. This is a kind of 4-step process, as follows: 1. Drill a 12mm (or 12) hole where the endpin used to be, to install the endpin jack. 2. Drill a hole through the bridge to allow the pickup wire to pass through. 3.