Originally Posted by bongostealth
I have a stereo barrel jack.
Have you done a continuity test between the ring and the sleeve with the jack disconnected? I'd gamble that this, or do you have any shielding near the jack?
Are you grounding to the control cavity?
If so, which terminal are you using for this on the jack? I made the mistake of using the ground from shielding to the sleeve (where the battery (-) was).
Any way you slice it, The (-) from the battery is getting ground from somewhere, instead of no ground, which it should be if the jack is disconnected..