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Pickups & wiring Discussion about pickup types, replacements, recomendations, switching, wiring diagrams and sustainer systems for ANY guitar, JEMs included.

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Old 12-04-2012, 08:16 AM
AlexFinger919  is offline
 
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Unhappy

Emg buzzing...grounding?


Hey,
I have a wiring problem with my Emg-equipped guitar...I think. It has a 60 in the neck position and a 81 at the bridge, one volume and a 3-way switch. When it is plugged in and the volume poti is turned up, there's a buzzing sound like when you touch the tip of the unplugged guitar cable, only much quieter.

It doesn't go away when you touch the strings/bridge, but it gets much better when you touch the pickups/jackplate/switch. So I thought it was a grounding issue and brought the guitar to a technician, who renewed the whole wiring inside the guitar (or at least that's what he said...). Problem still exists.

Then I thought, maybe it's the pickups themselves which are somehow damaged. I changed them for another pair of Emgs - same problem.

So it shouldn't be a wiring issue and it's definitely not the pickups. Whats going on here

I'd be really thankful for ANY ideas!

Best regards,
Alex
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  #2  
Old 12-04-2012, 04:42 PM
LonePhantom  is offline
 
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Re: Emg buzzing...grounding?


Do you have a ground wire going to the bridge or tremolo spring claw? If so this is most probably your issue. EMGs are internally grounded, and running a ground to the bridge will cause humming issues.
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Old 12-04-2012, 08:18 PM
silverctr  is offline
 
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Re: Emg buzzing...grounding?


Quote:
Originally Posted by LonePhantom View Post
Do you have a ground wire going to the bridge or tremolo spring claw? If so this is most probably your issue. EMGs are internally grounded, and running a ground to the bridge will cause humming issues.
That's good to know.
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Old 12-05-2012, 06:19 PM
AlexFinger919  is offline
 
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Re: Emg buzzing...grounding?


I could't see any grounding wire connected to the bridge. The guitar came with factory installed Emgs, so I wonder why there is this problem in the first place...
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Old 12-05-2012, 06:36 PM
LonePhantom  is offline
 
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Re: Emg buzzing...grounding?


Is this a new guitar? If it is take it back, they have warranties for a reason. If there's a problem it should be fixed or replaced.
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Old 12-05-2012, 06:50 PM
AlexFinger919  is offline
 
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Re: Emg buzzing...grounding?


Not new enough to do that, I'm afraid!
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Old 12-05-2012, 07:21 PM
LonePhantom  is offline
 
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Re: Emg buzzing...grounding?


Ok, well you paid a tech to fix the problem, and they didn't. Take it back and tell them to fix it properly. You paid for a repair, they should fix it for you. There is going to be something wrong with the wiring somewhere.
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Old 12-06-2012, 06:10 AM
AlexFinger919  is offline
 
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Re: Emg buzzing...grounding?


Thanks for your advice, but at the moment that's not an option as I'm in another city and need to sort the problem out by myself.

Does someone have an idea what could cause the problem and how to solve it?

Regards,
Alex
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  #9  
Old 12-06-2012, 12:35 PM
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metalhead52  is offline
 
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Re: Emg buzzing...grounding?


It is a grounding issue. Check the wires to the input jack. I had this problem when I got a guitar and removed the EMGs for stock Dimarzios. The 2 wires on the input jack were reversed.
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Old 10-11-2013, 03:28 PM
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Re: Emg buzzing...grounding?


Sorry for bringing this back from the grave. I have the exact same issues with my ARZ800 with EMG 81/60. I found out the bridge is indeed connected to the volume pot ground. Its hard to see with bare eye unless you use a VOM. Will check tomorrow to see if removing grounding solve the noise problem.

To give you an idea, my hum is much more than Dimarzio Fast Track 1, more than Dimarzio Fast Track 2 and less than a cheapo old japaneze SC in a completely unshielded old Aria strat.

Also, just figured out the stock shielding of ARZ800 is a joke. Hardly any connectivity in the supposedly "carbon paint" "shielded" control cavity.
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