Are the two SG P90 models hum cancelling in the middle position?

sirpluckalot

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I know with Gibson if the guitar is hand wired then the mid position is not hum cancelling but if it has a plug in circuit board like the Tributes then it is.
Don't know if the Epi's are hum cancelling p90's.
 

plankton

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Interesting, my 2020 (built Dec. 2019) Epi SG Special is not hum cancelling in the middle position, so I guess they changed that at some point.
 

donepearce

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Are p90s wired with coax? If they are you are stuck. If they have twin wires you can reverse one of them for hum cancellation. Fender have been able to manage that with their Strats forever, so it shouldn't be beyond Gibson.
 

DrBGood

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Are p90s wired with coax? If they are you are stuck. If they have twin wires you can reverse one of them for hum cancellation. Fender have been able to manage that with their Strats forever, so it shouldn't be beyond Gibson.
Hmmm ... what would happen if you reversed a braided wire ?
 

Les’s Nemisis

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I don't that I'd agree with that. If it's true, then pickups with twin wires (as opposed to one as a shield) would hum too. If you hook up two pickups in series with proper polarity / wind direction like a humbucker, I don't think it will matter if one lead is acting as a shield. It will hum buck.

Also, if the braided wire isn't connected to a pickup cover or the pickup chassis, it's just a coil wire. Then there's also cavity shielding to consider as a hum deterrent.
 

donepearce

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I don't that I'd agree with that. If it's true, then pickups with twin wires (as opposed to one as a shield) would hum too. If you hook up two pickups in series with proper polarity / wind direction like a humbucker, I don't think it will matter if one lead is acting as a shield. It will hum buck.

Also, if the braided wire isn't connected to a pickup cover or the pickup chassis, it's just a coil wire. Then there's also cavity shielding to consider as a hum deterrent.
Twin wires pick up hum equally, and because they are opposite phase the hum cancels. Twist them closely for complete cancellation.
With a screened braided wire only the outer connection is exposed to hum so there is no cancellation.
Ideal is a twisted pair inside a separate braid.
 

DrBGood

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Twin wires pick up hum equally, and because they are opposite phase the hum cancels. Twist them closely for complete cancellation.
With a screened braided wire only the outer connection is exposed to hum so there is no cancellation.
Ideal is a twisted pair inside a separate braid.
Twisted eh ? Hmmm. Never heard that one.
 


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