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

[sirpluckalot]

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.

 

[Crazy_8]

My 2021 EPi SG Special is hand wired and hum canceling in the mid position.

 

[DrBGood]

Yes they do

 

[plankton]

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.

 

[DrBGood]

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.

Hmmm ... indeed. Why would they do that though ?

 

[donepearce]

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]

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 ?

 

[donepearce]

Hmmm ... what would happen if you reversed a braided wire ?

Hummmmm

 

[Piper68Special]

My 2020 Epi Classic is not hum-cancelling in the middle position.

 

[Les’s Nemisis]

Hummmmm

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]

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]

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.

 

[donepearce]

Twisted eh ? Hmmm. Never heard that one.

Twisted pair? Been used for many decades to miinimise interference.

 

[DrBGood]

Twisted pair? Been used for many decades to miinimise interference.

I believe you, it's just new to me. I'm more familiar with paint brushes than electronics.

 

[Bad Penguin]

Hmmm ... what would happen if you reversed a braided wire ?

You would be out of phase.

 

[DrBGood]

You would be out of phase.

Oh yeah, forgot that one.

 

[donepearce]

Oh yeah, forgot that one.

Er - that was the object of the exercise

 

[DrBGood]

S'cuse me while I kiss the sky ...

 

[mikebisch]

You would be out of phase.

Unless you reverse the magnet too. Then you would be hum cancelling in the middle position.

 

[Maguchi]

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.

My 2022 Gibson LP Special is handwired and I was surprised that the middle position is not hum cancelling. Hearing some interesting new stuff here about twin wires and twisted pairs. I always thought one of the pickups had to be RWRP to be hum cancelling with both pickups selected. When changing strings next, I will take it to a tech and see if it can be wired for hum cancelling in the middle position without changing pickups.