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Buzzing LP

 
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Tele Savalas



Joined: 02 Dec 2003
Posts: 3052
Location: Virginia

PostPosted: Mon Jun 19, 2017 8:20 am    Post subject: Buzzing LP Reply with quote

Just buffed a new LP body, loaded the humbuckers and wired according to this schematic:


Plugged it in and get buzz from both pickups. Getting proper response tapping pole pieces in all positions. The buzz gets louder when the volume knobs are turned up, and also when I touch the tailpiece stud that ground goes to.
Do I have a ground loop somewhere?
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BrightKJ



Joined: 13 Sep 2008
Posts: 306
Location: Midlothian, VA

PostPosted: Mon Jun 19, 2017 11:06 am    Post subject: Reply with quote

In my experience, you have to watch those cheaply made push/pull switches. I've had a couple of them which were so bad that when I was soldering wires onto the switch lugs, it melted something internally -- and I was even using a low wattage iron. A lot of them are using low-temperature plastic and are inferior in construction.

I would swap in a regular pot to eliminate a bad switch and/or a ground loop as a possibility.
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Tele Savalas



Joined: 02 Dec 2003
Posts: 3052
Location: Virginia

PostPosted: Mon Jun 19, 2017 12:20 pm    Post subject: Reply with quote

The push-pull pot is the neck tone pot. If it were the problem, wouldn't the buzzing just be on the neck pickup?
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marksound



Joined: 15 Aug 2005
Posts: 16571
Location: OKUSA

PostPosted: Mon Jun 19, 2017 1:36 pm    Post subject: Reply with quote

I bet your ground wire isn't making good contact. I had the same problem on one and swore up and down that it was grounded, but our buddy Lou made me pull the bushing and reseat the wire. Boy was my face red. Embarassed
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Tele Savalas



Joined: 02 Dec 2003
Posts: 3052
Location: Virginia

PostPosted: Mon Jun 19, 2017 3:51 pm    Post subject: Reply with quote

The buzzing is quite loud. But I'll give it a try.
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BluesmanDave



Joined: 17 Nov 2008
Posts: 2789
Location: Sacramento CA

PostPosted: Mon Jun 19, 2017 8:48 pm    Post subject: Reply with quote

Betcha the output jack is wired backward.
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Johnson82



Joined: 27 Aug 2007
Posts: 1723
Location: New Castle, IN

PostPosted: Tue Jun 20, 2017 6:57 am    Post subject: Reply with quote

Yeah, it's almost certainly a ground issue (whether the ground connection is bad, or the jack is backwards). That, or you've got bees trapped in it somewhere! Laughing
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What kind of operation is that? No sawdust...no empty beer bottles...no one is using extremely foul language...no one is spending 2 hours looking for lost tools...no dust on the bodies in the finishing room…
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Tele Savalas



Joined: 02 Dec 2003
Posts: 3052
Location: Virginia

PostPosted: Tue Jun 20, 2017 9:00 am    Post subject: Reply with quote

Man, although I've wired 60 or 70 jacks in my time, and it would embarrassing if I wired it backwards, but that would be a huge relief! The neck is clamped right now, but the glue will be set tonight and I'll have a look. I must admit, the symptoms are pretty much identical to the one time I did wire a jack backwards.
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Tele Savalas



Joined: 02 Dec 2003
Posts: 3052
Location: Virginia

PostPosted: Tue Jun 20, 2017 4:06 pm    Post subject: Reply with quote

Dave wins!! Thanks, Dave!!! Mark, I did pull the bushing and the wire was in good position, but I tinned it for good measure. Pounding the bushing back in, I put three dings in the clearcoat, which I have drop-filled. Rolling Eyes Hoping it will be dry enough tomorrow to sand and buff. This is a kind of unique axe, a double-cut carved top LP, asymmetric bouts. I'll post some photos in the refinishing section when done.
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jorg



Joined: 31 Mar 2010
Posts: 400
Location: Grand Absurdity, Texas

PostPosted: Wed Jun 21, 2017 7:12 am    Post subject: Reply with quote

Looking forward to pics.
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BluesmanDave



Joined: 17 Nov 2008
Posts: 2789
Location: Sacramento CA

PostPosted: Wed Jun 21, 2017 11:40 am    Post subject: Reply with quote

Tele Savalas wrote:
Dave wins!! Thanks, Dave!!!


Ask the guy who's done it a dozen times... Rolling Eyes Glad you're up and running!
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