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Post by jeremybender on Aug 8, 2017 6:20:22 GMT -5
I want to wire an HSH strat to this crossover wiring by Phostenix. if you look at the image attached, the coil split for the bridge humbucker splits the inside coil. I'm using all Suhr pups for this one. how do I need to change the wiring scheme to have the bridge's outside coil split and still have a hum free set up? (in this diagram, the neck humbucker splits the outside coil - which is to me, a more desired sound. which is why I want to do it on the bridge one, too). will it require me to replace the Suhr middle pup with RWRP?
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Post by JohnH on Aug 8, 2017 15:14:02 GMT -5
Assuming that you have two humbuckers where both slugs are one polarity and both screws are the other (as P assumed - but check with yours), the easiest (maybe only) way to get what you want is to physically spin the bridge pickup 180 degrees. No change to any wiring. Humcancelling and phase will not be affected by this.
Fundamentally, if you want an in-phase humcancelling combo of two coils, they have to be opposite magnetic polarity and no wiring fix can change that.
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Post by jeremybender on Aug 8, 2017 15:40:48 GMT -5
Thank you JohnH.
I have to wonder though, I read this in the Suhr forums:
"If you choose the forward coil of the humbucker bridge or neck pickups (the most desired tone IMO) you use our RWRP in the middle and you will be hum canceling Our RWRP middle is South Top and Counter clockwise when looking at the top"
"The middle pickup should be RWRP if you are splitting with humbuckers. The inner coil on a Suhr Bridge humbucker is Clockwise and North magnetism when split. You would need a RWRP Counterclockwise and South for the middle in order fr it to be noise cancelling. When split with a Neck humbucker normally the outer coil (closest to neck is used and that is Clockwise and North as well."
"If you like I like the neck coil (forward coil) on when splitting the humbuckers (running Red/White to ground) then a RWRP pickup of ours will be hum canceling in the combos. If you were to do Series/parallel or not split the humbuckers it wont matter"
so I'm trying to understand... if I want to split the coil closest to the neck (as shown in the diagram) AND to split the coil closest to the bridge (opposite of what's shown on the diagram), should I get RWRP middle pickup or not?
or, if I'll switch the pickup with RWRP, it will give me the bridge outer coil just right, but will interfere with the neck's outer coil in position 4?
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Post by JohnH on Aug 8, 2017 23:08:22 GMT -5
I think you may have to make a choice here.
The design offers three combos of single coils, being either split from N or B or the M single.
The humbuckers always split to the same coil, as drawn its the two neck-side coils but you can rotate the B physically to make it the two outside coils.
Given that, dependent on how you choose the M pickup and the wiring order of N and B coils you can, at best, have two such combos humcancelling and one that isnt. So youd have to select one if BN, BM or NM that would hum (about the same as a seperate single).
In principle, the neck coil could change to always be selected to be the one to cancel hum with B or M. B and M could be opposite so they cancel. But this design diesnt offer that.
Its all not too much of a big deal though and doesnt affect other combos.
Another thing is; RWRP is only a relative term compared to another known pickup.
But I think tbat relative to all Suhr pickups and based on this design, what they say and what you want, you probably want an RWRP M pickup and rotate the B. The BN single combo would hum.
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Post by jeremybender on Aug 9, 2017 1:04:44 GMT -5
In principle, the neck coil could change to always be selected to be the one to cancel hum with B or M. B and M could be opposite so they cancel. But this design diesnt offer that. Thanks again for a very knowledgeable answer. Highly appreciated! I think I understand now. Out of interest, what design does offer a hum canceling mixture of N/M, N/B and B/M?
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Post by JohnH on Aug 9, 2017 4:55:34 GMT -5
In principle, the neck coil could change to always be selected to be the one to cancel hum with B or M. B and M could be opposite so they cancel. But this design diesnt offer that. Thanks again for a very knowledgeable answer. Highly appreciated! I think I understand now. Out of interest, what design does offer a hum canceling mixture of N/M, N/B and B/M? Heres one for HSH..see from page 3, based on Guthrie Govan. I just fixed a couple of broken old photobucket pix. guitarnuts2.proboards.com/thread/4675/suhr-guthrie-govan-wiringAnother HSH, with splits and phase, all hum cancelling in split modes. (not built) guitarnuts2.proboards.com/thread/7568/nighthawk-hsh-redux?page=2&scrollTo=78934I have a couple of HSS that do it too but I assume you want HSH
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Post by reTrEaD on Aug 9, 2017 10:03:32 GMT -5
The design in the OP has a peculiarity. If we assume the HBs are both 'normal' in the sense that both slug coils have north up, The #4 position with S-1 down, has the screw coil of the neck combined with the slug coil of the bridge. We would expect this to be hum-cancelling.
With S-1 up: #2 has Middle and Bridge slug. #4 has Middle and Neck screw. Only one of these two can be hum-canceling if #4 S-1 down is hum-canceling.
Note: I'm only going by the truth table. I haven't verified the actual wiring.
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Post by jeremybender on Aug 10, 2017 2:09:41 GMT -5
The design in the OP has a peculiarity. If we assume the HBs are both 'normal' in the sense that both slug coils have north up, The #4 position with S-1 down, has the screw coil of the neck combined with the slug coil of the bridge. We would expect this to be hum-cancelling. With S-1 up: #2 has Middle and Bridge slug. #4 has Middle and Neck screw. Only one of these two can be hum-canceling if #4 S-1 down is hum-canceling. Note: I'm only going by the truth table. I haven't verified the actual wiring. Thanks. I understand the polarity of the splitted coils are neck:north, middle:south, bridge:south If both humbuckers are the same, I guess switching between grey and red wires on the bridge will give me hum canceling position 2 and 4 with S-1 up by splitting the screw coil instead of slug which will be then north magnetism? I also wonder why isn't it possible to split bridge screw with S-1 down, and bridge slug with S-1 up...
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Post by newey on Aug 10, 2017 8:40:44 GMT -5
Because you'd need another switch pole to switch another item, i.e., between bridge coils. Your diagram shows all the poles of the S-1 and of the Superswitch being used for the existing switching, so no room for expanding your wish list.
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Post by jeremybender on Aug 11, 2017 7:23:21 GMT -5
as reTrEaD wrote above, there are 3 split positions with this wiring:
S-1 down #4 position - Neck screw and Bridge SLUG - Hum-canceling S-1 up #2 - Middle and Bridge SLUG - Humming S-1 up #4 - Middle and Neck screw - Hum-canceling
if the polarity of the split coils are neck:north, middle:south, bridge:south I guess switching between grey and red wires on the bridge pickups will give me hum canceling position 2 and 4 with S-1 up? by splitting the screw coil instead of slug which will be then north magnetism?
then I could get:
S-1 down #4 position - Neck screw and Bridge SCREW - Humming S-1 up #2 - Middle and Bridge SCREW - Hum-canceling S-1 up #4 - Middle and Neck screw - Hum-canceling
Thank you all.
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Post by newey on Aug 12, 2017 8:05:56 GMT -5
First off, the wire you describe as "grey" is actually white on the actual SD pickups, it's shown as grey on the diagram so it can be seen.
I am not sure what you mean by "switching between the grey and red wires". On the diagram, both these wires go to the lower left-hand pole of the superswitch. To wire so as to select the other coil, you would wire the bridge pickup "inside out". The green and black wires would be wired to the pole where the red/white pair currently reside, the red wire then replaces the green, and the white (i.e., grey) then replaces the black.
As you correctly note, you won't get "something for nothing", as you will lose hum-cancelling in another position.
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