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My brother has a Fender Jazz bass, and everytime you turn the tone pot past quot;1quot; it starts buzzing and hissing terribly. With the tone at quot;0quot;, there is absolutely no hiss or buzz at all. I took it to my local guitar shop / repair shop and they rewired it and made sure everything was grounded well. I just brought it back home and it is doing the same thing. Again, adjusting the volume of either pickup has no effect on the noise, only when the tone is turned up does this noise begin. The wiring looks great with good solder joints, so my only guess is the pot itself is fried.

What do you think it is?

Thanks to those who reply, I really need to get this worked out soon because it's getting on my nerves.

Nathan

It could be a bad pot or a less than optimual ground at the house or it could just be noisey single coil pickups. Jazz basses are always somewhat noisey, especially if both pickups volumes are not at 10, which reduces the hum cancelling of the pickups.

Are you using the stock pickups?

They are quot;newquot; CTS pots, but I guess it's possible I overheaded it when I installed. The pickups are the Hot Stacks, so hum isn't an issue. I looked and they are wired correctly and grounded. Like I said, it only seems to be the tone pot, no matter what level the volume is. I haven't tried with both volumes turned off yet...

Long shot, but could a bad capacitor cause it? It's in the ground path...

Nathan