Page 70 - Triwatt Custom Lead Amp Builder's Guide

Appendix 5 - Cliff Jacks Explained

Here's a Cliff-style jack wired for a single input.

With no guitar plugged in, there's continuity to ground for lugs 2 and 4 (a direct connection) and
also for lug 1 (it's not switched and therefore mechanically connected to lug 2 with the crossover
wire). With a guitar plugged in, the switching breaks, and now there's only continuity between
lugs 2 and 4 and ground. Of course, with a guitar plugged in, you'll read a resistance of 6-12K for
lug 1 to ground - depending on your pickups. If your guitar's Volume pot is at zero, you'll find
continuity to ground instead.

You should get continuity between the tip and chassis with nothing plugged in because of the
shorting jack and the cross over wire. From 18W Forum – loverocker & ebe

TrinityAmps TRIWATT Builders Guide Ver. 2.31.docx
- 70 -