I've recently bought second-hand an EHX C9 organ sound pedal, which initially tested out OK. However, at rehearsal when I tried using it, my swelling organ was cut off in its prime. A little experimenting then showed it was an unreliable connection to the output jack socket.
I've done a bit more diagnosis since then. There are two output jacks, one dry and the other a mix of effect and dry. Both sockets behave similarly. It's not the lead, this has happened with several different leads. I think that the tip can be moved out of contact with the, er, contact. All of the springy contacts are, indeed, springy. I'm using Neutrik and Rean plugs. The sockets show no sign of moving on the PCB.
The guilty sockets are at the top. I suspect that the little dips in the contacts for the tip are losing contact if the plug is moved a bit.
This is going onto a pedalboard so hopefully there shouldn't be an issue over jack plugs moving, but I would like to solve it. I'm tempted to try bending the springy contact down a bit to make it a more positive contact. Has anyone else encountered a similar issue, and managed to solve it?