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Ground Issue

Hey everyone.

I know this is talkbass, but this is a guitar question. I figured that

1. Everyone on here is probably more intelligent than 75% of the guitar community out there.

2. The ideals behind wiring are essentially the same.

If you absolutely refuse to help me because it's a guitar, I understand that too, but with all this preface, I digress.

My guitar (MIM Telecaster) suffers from an annoying 60Hz hum that stops whenever I touch the strings, pots, etc.
I grounded the bridge, and I've double checked just about every connection. I've got a Seymour-Duncan STK-1 in the neck (It's a Humbucker with a phantom coil) and a Little '59 in the bridge (Single coil-sized humbucker). The Little '59 is practically unusable with distortion due to microphonic feedback. Upon reading different posts here, I've come to the conclusion that the pots cannot be responsible for the ground problem? I've also tried changing the capacitor. Lastly, the cavity is NOT shielded, but I wanted to try everything before I turned to shielding. My biggest issue was that before I installed the Little '59, there was no ground problem. And I had the stock single coil bridge pickup installed previously.
I dunno. I've just tried about every damn thing I could think of.

Any suggestions on what I could do?

Thanks a lot!
 
You are correct that the posts and tone cap will not pick up hum if everything is properly grounded. Make sure the bodies of the pots and switch have good connections to the control plate and the control plate has a good connection to the output jack ground.

Sounds like there is a wiring problem with the Little '59. Is it wired per this diagram?

http://www.seymourduncan.com/images/products/electric/telecaster/501015-115.pdf

Also see my response in this post for an explanation of hum and buzz.

http://www.talkbass.com/forum/showthread.php?t=733597&highlight=ground

mech
 
Thanks for your response Mech.

Yes, if I recall correctly, my guitar is wired exactly the same as the diagram. My only difference is that the ground wire is attached to the volume pot instead of the tone pot, but since it's all ground, I don't think that matters. I've rechecked just about every connection too and re-soldered it. The only thing I haven't tried is just pulling the little '59 out. Could it be a bad pickup perhaps?

Thanks again man.
 
As long as the bodies of the vol and tone pots are grounded it makes no difference which the PU is grounded to.

Could very well be a bad PU. May be time to swap it out and see. With the microphonics you mentioned it has other issues too.

mech
 

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