Guitar Lead Tester
This is the sort of half-hour project which anyone can make (except of course that one never gets round to it), and which should be part of the standard tool kit of any serviceman, road crew, or retail shop. It will tell you whether a guitar lead is shorted, and whether both leads connect through to the plugs at each end. What is more important is that it will do these tests without the need to hold test leads onto the plugs, so you are free to bend or stretch the guitar lead in case it has an intermittent fault. It is common for a coiled lead to test O.K. when relaxed, and to crackle or cut out, only when stretched to a particular length. The diagram is self explanatory. The battery life should be the "shelf life", and if you use (say) a leakproof L.P.U.ll cell or similar, you can solder it in and forget it.
mu:zines is the result of thousands of hours of effort, and will require many thousands more going forward to reach our goals of getting all this content online.
If you value this resource, you can support this project - it really helps!