Input Jack Hum

[jessejames]

I have everything wired up just as so.

I have hum coming from the input jack, it goes away when I touch it, so obviously it is a ground issue, but I can't figure out where the issue is coming from.

[Prostheta]

I would put money on your jack connections being the wrong way around. I think all builders have done this at one point ;-)

[SwedishLuthier]

Or, as the hum dies when he's touching the jack, he is missing the ground wire to/from the bridge

[Our Souls inc.]

try changing it into an output jack and see if that helps.

[Ripthorn]

I agree with Prostheta, though Peter's suggestion is also totally likely. Another possibility is a cold ground joint (though that might produce hum at all times, unless you are actually grounded). I've done both and both cause hum that tends to go away when you touch it.

[Prostheta]

Or, as the hum dies when he's touching the jack, he is missing the ground wire to/from the bridge

[jessejames]

I do have the ground from the bridge going to the volume pot. then I have it going to the input jack. Or I am not getting exactly what you mean.

[Prostheta]

Sounds like that isn't the problem then. If you have a continuity meter, I would double check that thoughby popping a lead into your guitar and checking for continuity between the earth sleeve on the far end of the jack and bridge/strings. That should check two problems with one stone. Or is that kill two birds with one continuity test?

[ebuck]

If you're using two separate physical wires going to the output jack that can add hum. Are you using any kind of metal shielding in a cavity or pickguard?