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kamadude1216

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  1. Chiming in here to help since I've done basically a 1:1 replica of the Roxy SG schematic (the one Dweezil endorsed in 2013). Take a 57+ classic for the bridge and a 57 classic for the neck. I'm assuming you have 4 conductor versions if you're attempting this. A few very important things to get it working right and hum cancelling: each pickup should have the magnets opposite polarity of each other. Bridge screws: South; bridge slugs: North. Neck screws: north; Neck slugs: South. Alnico V magnets on both. I believe the Roxy replica used the shorter length bars (about the same as 2.34in ones you can buy from Philadelphia Luthier Tools). I also tried 2.5in ones from the same place. I think it's up to personal taste. Next thing to address is the electrical polarity. Easiest way to explain this is to use traditional Gibson wire color coding. We'll use our bridge as the reference. Remember that its screws are south magnetic and slugs North magnetic, therefore, the traditional wire coding/electrical polarities apply to it. The neck is where it gets tricky since we've flipped the magnet on it, and as a consequence, the electrical polarities are also flipped on it as well, so be very careful that you're matching the right wire pairs to each coil. VERY IMPORTANT: ON BOTH PICKUPS, WIRE THE BARE WIRE DIRECTLY TO GROUND, BUT DON'T SPLICE IT WITH THE COIL NEGATIVE LEAD AND/OR WIRE IT TO ANY SWITCH. OTHERWISE, THIS WILL LEAD TO EXCESS NOISE and buzzing/hum, ESPECIALLY WITH THE NECK PICKUP PHASE SWITCH ENGAGED. Now with that prep work addressed, here's the soldering part. All you really need are two DPDT switches. These can be push pull pots or mini toggles if you want to stay accurate to the Roxy. Per videos Gibson has on YouTube, the coil split switch acts as a master coil split switch. All you need to do is wire each spliced pair from each pickup to the center pair of the dpdt. Leave one terminal pair untouched and the other terminal pair wired to ground (this is what allows us to kill the series link that creates the Humbucker). The other DPDT is matched with the NECK Humbucker only. Wire the hot lead to one center lug and your negative lead to the other center lug (remember your series link is already taken care of at this point if you wired up the master coil split switch first, and the bare wire should have already been wired directly to a ground location such as the back of a potentiometer). The other terminal lug pairs will be wired in an "X" fashion. It's difficult to explain without a diagram, but just Google Humbucker phase switch wiring and it should be exactly what you need. Congrats on making it this far if you have! If everything was wired correctly, then you should have both slug/inner coils active in the middle position with the master coil split switch engaged while still remaining hum cancelling (this is why we went through the effort of having both opposite magnetic and electrical polarities). Engaging the phase switch while in the middle position should make the sound nasally and honky and even more nasally and razor sharp zappa-like with the coil split engaged in conjunction. Coil splitting also works in bridge only and neck only positions. The phase switch won't do anything in the bridge position. However, in neck position AND coil split mode, engaging the phase switch causes the neck to switch to the screw coil (coil closest to the neck instead of the default slug coil in split mode). Also, just to clear any confusion, the hot wire from the bridge pickup goes directly to the volume pot. Remember that the neck pickups' hot lead was wired to the DPDT, therefore, just follow the wire diagram for the phase switch schematic that depicts "to switch/pot," and wire accordingly. Same thing with how/where to wire the lead that acts as negative by default in relation to the phase switching schematic. I'll try to find drawings and labels I made on my own pickups later when I get home. I used CTS push pulls to keep the process non-invasive, but any kind of DPDT should work. Hope this wall of text helps you guys!
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