Hot rail bridge with rwrp middle coil split help

DanDan29

New member
Hi guys, so I’m about to install an SD hot rails in the bridge and 2 ssl5s (middle is rwrp) in my Japanese strat noir and I’ve some wiring questions.
I’ll be following the wiring guide I’ve put below as it splits the coil in position 2 to go hum cancelling with the middle. But since the middle pickup I’m installing is rwrp I’m just wondering what wires I need to swap to get the other rail working in hum cancellation rather than the rail in the diagram.
I’ve seen one gentleman on YouTube say in a video that I should swap the position of the green and black wires and on other posts I’ve seen in forms they say to swap it differently so I’m a bit confused.
Thanks for your time and help,
video of guy explaining on YouTube: https://youtu.be/j2zCvVsRR64
 

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The diagram looks ok, but it doesn’t say anything about hum-cancelling using RW/RP pickups.

Wiring the hotrails using this diagram, it will use the North coil in position 2. For hum-cancelling it requires a middle pickup with South magnetic polarity. Therefore I suggest to use the standard SSL-5 in the middle position, and the RW/RP version in the neck position. The two pickups are identical apart from magnetic polarity and wind direction, so it doesn’t cause any issue to swap their positions.
 
The diagram looks ok, but it doesn’t say anything about hum-cancelling using RW/RP pickups.

Wiring the hotrails using this diagram, it will use the North coil in position 2. For hum-cancelling it requires a middle pickup with South magnetic polarity. Therefore I suggest to use the standard SSL-5 in the middle position, and the RW/RP version in the neck position. The two pickups are identical apart from magnetic polarity and wind direction, so it doesn’t cause any issue to swap their positions.

The wind direction is always the same. RW means reverse wired.
 
If i wired it like this to use the other rail will it be hum cancelling in position 2 or?
 

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You still wouldn't have hum-cancelling in 3 or 5, though...

i only want hum cancelation in position 1,2 and 4. So my wiring change would work you think yes?

Edit/Update: I got a confirmation from SD support via email and the two ways to do it are following the original diagram and swapping the neck and middle pickups like Teleplayer said or following my changed wiring diagram.
cheers guys thanks for the assistance ☺️
 
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The wind direction is always the same. RW means reverse wired.

I have read previously that all S.D. single coils are wound on the machine in the same direction as you claim (same physical winding for both standard and RW/RP versions). Until I checked today I believed that it was true. However looking at my SSL-2 (date = 20130523), the wire has been wound anti-clockwise around the bobbin, whereas my SSL-2 RW/RP (date 20150803) has been wound clockwise. It means the start of the coil is grounded in both cases. Obviously the leads must be connected to the reverse lug positions for the RW/RP version, but it is the physical direction of the pickup winding that I refer to here.
 
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The wind direction is always the same. RW means reverse wired.

I believe it means "reverse wound." That's how the the RF in the air, cancels.

The two coils in a humbucker are wound the same direction. Then one is hooked up "backwards." The lay of the magnet fixes that.
 
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Update: Hey guys so I’ve the soldering done but somethings up. Forgive how I’m going to describe this if it sounds noobish, when doing the screw driver tap test in position 1 the outer blade taps normal but the inner one buzzes while tapped, in position 2 the outer blade which is ment to be off taps nearly as loud as the middle ssl5 and the inner blade is still buzzes while being tapped. All other positions are fine.
I used the ssl5 rwrp in the neck like suggested above. I’ve attached some picture of my soldering attempt and the guitar, is there anything wrong with it?
Thanks for your time.
ps: I have the trem off as I was trying to fit a vega trem I’ve had lying around for ages but it doesn’t fit (needs a thread adapter and maybe a wider mounting bar).
 

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What you describe sounds reasonably normal to me. In position 2, the inner blade should be louder than the one closer to the bridge. The two blades are magnetically coupled, so both blades are sensing even when using to coil-split in position 2.

You could hear buzzing because your body was probably not grounded when you did the test. If you re-test with one hand touching the back of the volume pot or the trem-claw (which should have a ground connection) there should be less buzzing.
 
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I believe it means "reverse wound." That's how the the RF in the air, cancels.

The two coils in a humbucker are wound the same direction. Then one is hooked up "backwards." The lay of the magnet fixes that.

I am sure about the same winding direction for vintage SD pickups. Maybe today its different if you use CNC winders or more different setup winding machines. If you have only one ‚analog‘ winder, setting up for other winding directions takes quite a time and testing. So its much easier to wire it reverse.
 
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