When pushed down, the Selector is selecting the bottom 4 lugs (B-C-E-F). B connects to C, and E connects to F. When pulled up, the Selector slides up and is now selecting the top 4 (A-B-D-E). B connects to A, E connects to D. As you can see, B and E are always connected. Keep in mind: there are still two sides to this switch – meaning, you can Coil Split two humbuckers with one switch.
A perfect example of this is Coil Splitting – let’s take a look:
Coil Splitting is just one of the many things you can do with a Push Pull Pot. You can use Coil Splitting to turn a Humbucker, with two coils, into a Single Coil by sending one of the coils to ground. For illustration, we drew this out for you below. We used both sides of the switch to illustrate two points: 1.) It shows how to wire up 3-Condutor and 4-Conductor, and 2.) it shows that you can tap two separate humbuckers with the same switch, by using both sides.
It’s actually really simple, how it works:
- When the Push Pull Pot is pushed down, The humbucker is working like normal.
- When the Push Pull Pot is pulled up, the “Tap” (Red on 3 Conductor, Red and Green Tied Together on 4-Conductor) is sent to ground, “Shorting out” the coil. The entire Casing of the pot should be grounded, so theoretically, you can ground any wire off of the switch by just running a jumper to the casing.
Partial Coil Splitting:
Coil Splitting can sound great on higher output humbuckers, like our Standard Humbucker, and our High Output Humbucker. But what if you have a low-output humbucker, like our Pure P.A.F.? Fear not. You can “Partially Split” the coil, with our Partial Tap Resistor.
How it Works:
When you pull up on the push-pull pot, B is now connected to A, and your Slug Coil will be sent to ground, only this time, it goes through a resistor. This prevents the whole signal from being grounded by putting a partial short across the coil, instead of a full short. In turn, you’re getting a stronger single-coil sound from your humbucker when split.
This is a cool little trick when you want to reverse the coil direction of your pickup. A lot of players find this sonically pleasing, especially when used with a Blender Pot, which will roll in the pickup’s phase – pretty cool! In order to do this, you need 2-Conductor Wire. Always remember the Shield (Bare) will ALWAYS be grounded. Here’s how to wire this up:
How it Works:
When the switch is pushed down, White is to White (Terminals E -F), Black is to Black on Terminals B & C. When pulled up, The phase is reversed!
Oh yeah. This article wouldn’t be complete if we didn’t have any cool tricks to use. I’ve included a few of our favorites, and hopefully you’ll find them useful!
Mod 1: Two Tone Caps, One Push Pull Pot:
This mod is pretty cool! With this mod, you can use two different tone caps with one push pull pot. When pushed down, you can have say, a .02mfd Cap, and when pulled up, you can have a Fralin Magic Cap, or vice-versa! Make sure you bust out your soldering iron for this one – it gets a little cramped!
How it works:
- The Signal enters the Pot at Lug 2.
- The Sweeper, Lug 2, is connected to one side of the switch, at point E. (This whole thing can be reversed).
- When Pushed Down, the Signal is being sent through Terminal F. When Pulled Up, the Signal is being sent through Terminal D.
- The other side of the switch is Grounded. When you roll the Tone Pot, more of your highs are being sent to Ground, via whichever cap value you choose.
Mod #2: Using a Push-Pull to Engage Treble Bleed
Our Fralin Volume Kit is a great Treble Bleed circuit. What it does, if you’re not familiar, is keep your high frequencies as you roll the volume down. Country, Blues and Rock guitarists love this as it keeps their crisp highs when they roll down the volume. But what if you need more versatility? Here’s how you can engage it by pulling up on the Push Pull Pot. When pushed down, your volume knob will act like normal – it will bleed treble into ground. However, pulling up on your Push Pull Pot sends your signal through the Volume Kit, making your guitar keep its’ shimmer!
How it works:
- When pushed down, your signal is entering through lug A, but it ends there, as it doesn’t have anywhere to go.
- Pulling up, A & B and E & D are now connected, connecting the Volume Kit to your circuit.
If you want to reverse this, simply move the Connector Wires (two cream wires in the photo above) to Lugs C & F. This will remove the Volume Kit when you pull up.
Mod #3: Bright Switch
The “Bright Switch” is a simple mod that adds a little extra Treble to your signal. It does this by removing your Volume Pot and Tone Pot from your signal path, which always “load” your signal. Essentially, it’s like connecting your guitar’s pickups direct to the output jack. It’s a pretty crazy difference – your guitar sounds bigger, brighter, and louder.
How it works:
Note: Pickups and other electronics get grounded to the back of the volume pot, just like normal. The 3rd Lug just isn’t connected.
Mod #4: Series / Parallel Switching For Humbuckers:
Changing your humbucker from Series to Parallel works really well for some humbuckers, especially some higher output humbuckers. You can get some of that “Strat Quack” and it opens up a whole new dimension for your humbucker. To accomplish this mod, you’ll need a humbucker with a 4-conductor lead. Please note that the color codes are for Fralin Humbuckers only.
How it works: Red connects to green Green when the switch is down. This is a normal “series” humbucker operation. By pulling up on the switch, Red is now connected to White, and Green is now connected to Black. The “hots” connect, and the “starts” connect together – giving you your parallel.
Odds n’ Ends:
Before we wrap up, here’s a few things we want to clear up.
Notes On Grounding:
You can use anywhere on the Pot’s chassis to ground a signal. So, when grounding a wire, you can run it to the metal housing that houses the DPDT switch, or the side of the Pot itself. A cool little trick is to ground a wire on the bottom tab, at the very bottom of the Switch. (See the image at the top of the page to see what we’re talking about here).
CTS® has a new type of Push Pull pot, which can make wiring a little easier. CTS made these contact points easier to reach, so you can fit this pot in more guitars. However, if you’re not familiar how it’s all connected, it can be a little confusing. Here’s what it looks like:
Instead of running your jumper wires to tiny little lugs, you can run them to full-size holes. The order is a little different, but all the concepts are the exact same.
Well, that’s all for now. I hope that this article has been helpful, and informative. We have Push Pull pots available on our website here. Now, grab some, and get to modding!