My output jack socket was loose and the cable kept dropping out. The movement was also affecting sound quality, so I purchased a new jack.

I wanted a Switchcraft gold long body version, but my local shop didn't have a Switchcraft one. I purchased an unknown brand equivalent & soldered it up myself.

I plug in and get huge buzzing, to the point you can't hear any music.

Today I required the jack socket making sure everything was A1. I went through with a circuit tester and there is a short in the plug (plugged in cable, got signal from each solder point to both sides of the cable unplugged end).

Is it likely it was a dud jack socket, or more likely I overheated it when soldering?

I am about to embark on a number of upgrades, and don't want to fry all the components