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Picture of Guitar Killswitch
Guitarists such as Tom Morello of RATM and Audioslave and Buckethead are known for their use of killswitch in their songs to add cool effects. Although killswitches are used infrequently, they are pretty cool to have on you're guitar, and they only cost about three bucks (depending on what you have) to install. In this instructable, you'll learn how to install a killswitch in your own Strat style guitar. Keep in mind that I also explain how to install a killswitch in all style guitars, however I show with pictures Strat style guitars.

A demonstration of my killswitch...I also demonstrate the "pop" that many of you have questions about.


Disclaimer: I am not responsible for any damages that may occur while modifying your guitar. This is merely a guide. If patience is utilized, then no damage will come.
 
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Step 1: What is a killswitch?

Picture of What is a killswitch?
For those of you that don't know what a guitar kill switch is, it's basically a momentary switch, that when pressed, stops signal from going out of the guitar and going into the amp. Basically, when the button is pressed, there is no noise. Les Paul players usually achieve this effect by setting one pickup's volume to zero, and switching back and forth between pickups, creating a stuttering effect. However, this cannot be done on a Strat., since there is only one volume potentiometer.

The basic concept of my killswitch design is to create a circuit in which the output signal can reach the ground. When the circuit is completed (by pressing the switch), there no sound is heard.

IMPORTANT: Simply putting an on/off switch on the outgoing signal wire is VERY BAD. The resulting sound is that of when you unplug or plug your guitar in. That annoying buzz.
Source - http://www.stinkfoot.se/andreas/diy/mods/killswitch.htm

The popping sound is normal, due to the physics of the killswitch. Adding resistors and capacitors wont do anything. Source - http://alexplorer.net/guitar/mods/killswitch.html

Step 2: What you need

Picture of What you need
You need:
1 SPST "Push to make" Momentary switch - I got mine at Radioshack for 3.20
Important: You must get a switch that is normally open (off), and when pushed, closes a circuit.

Wire - This should be about the same guage as the wire in your guitar, it doesn't have to be exact, but don't have a huge thick wire.

Solder & Soldering Iron - This project requires some simple soldering, nothing too complex. I learned to solder with this handy instructable.

Wire strippers

Screwdriver

Electric drill & drill bit (on the back of the momentary switch packet theres dimensions for the hole you should drill) - I'd recommend that the drill be corded, since cordless drills lack the power that corded drills have

Things that would be really helpful to have:
Helping hands: These things make this project 500 times easier, instead of duct taping wires to hold them in place, or asking somebody to help you, the Helping hands can hold them.

Step 3: Opening the guitar

Picture of Opening the guitar
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First, cut all of your strings off. Then unscrew all the screws holding the faceplate to the guitar.

Note: If you never took the faceplate off your guitar, the screws near the pickups and pickup selectors should not be unscrewed.

If you want, you can flip your faceplate upside down so that the components are showing. Be careful as there are 2 wires (one going to the output jack, and one grounded to the bridge) connected to other parts of the guitar, so don't yank too hard.

Step 4: Soldering two wires onto momentary switch

Picture of Soldering two wires onto momentary switch
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You don't need to solder the wires together, I do because I'm afraid that braided wires might come loose and the switch would become broken easier.

Carefully take two wires, and strip both ends. Then solder one end of each wire to the two contacts on the switch. The order does not matter.

This is where the helping hands come in handy, if you don't have one, ask somebody to help you....or do like I did and tape everything to a table and solder.

Step 5: Drilling the hole in the faceplate

Picture of Drilling the hole in the faceplate
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This is the point of no return for this project.

Now that you have your switch half completed, flip your faceplate so that the components are inside the guitar and chose an appropriate location for your killswitch on your faceplate. Using the appropriate size drill bit, drill a hole into your faceplate.

Test fit your switch to see if it can fit in. If it can, then mount the switch onto the faceplate by placing the nut included on the opposite side of the faceplate, and tightening it until the switch is secure.

Protip: Its better to chose a switch that needs only a hole to be drilled. The switch I bought needed a little notch, and I scratched my faceplate making that notch

Step 6: Soldering the switch to the volume pot.

Picture of Soldering the switch to the volume pot.
This part was pretty tricky for me, mainly because I was working by myself with nothing helping me to position the wires. Remember, you don't need to solder the wires, if you cannot solder. You can twist them on, however they might fall off with time.

I soldered one wire onto the middle contact on my volume pot. (output signal), and the other wire onto the actual volume pot itself (the volume pot was grounded)

For non-Strat guitars: Though the wiring for the pickups and all are different in Les Pauls and other style guitars, the basics for the killswitch are the same. Instead of soldering the killswitch onto the volume pot, on other guitars, simply trace the wire that goes into the output jack (in this case a gray wire) and inside the wire should be two smaller wires. Simply solder one wire thats attached to the killswitch onto one of the wires found in output jack, and solder the other wire attached to the killswitch to the other wire. One of the wires coming fro the output jack should not have a rubber casing, as it is the ground. Basically what you just did was create a potential bridge in which you can kill the signal with the press of a button.

Step 7: Making space for the killswitch on the guitar body.

Picture of Making space for the killswitch on the guitar body.
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This was the most annoying part. Since the area that you chose to place your killswitch will most likley not be hollow underneath, you must make it hollow. I hollowed my section by drilling a lot of holes, then connecting them. If you have a router, use it.

Step 8: Finishing up

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Now that you're almost done, put all the wires in the hollow spaces in your guitar and screw the faceplate back onto the guitar. Restring your guitar. Have fun.

Step 9: FAQ and Troubleshooting

So many questions come in, so I decided to make this section.

Question:Why isn't my killswitch working?
Answer:Many different possibilities. Maybe you spliced the wrong wire, remember, you want the output signal wire to be routed to the ground. If thats not it, then maybe you have the wrong switch. You want a normally open switch, otherwise known as normally off. Other possibilities might be the connections between the switch and the wires.

Question:Why do I get that popping sound when I use my killswitch?
Answer: Don't worry, you're killswitch isn't broken, you did everything right. The pop is normal. If you ever taken physics and learned about waves and stuff you might understand that cutting the signal results in a pop. This site helps explain more.This site helps explain more. This video also shows and explains the pop.


Question: Can you make a diagram for my Gibson SG or Les Paul?
Answer: Ive done it before, but if the demand is increasing I might just make a diagram and post it.

Question: What if I have no faceplate?
Answer: Drill the hole through the back of you guitar by unscrewing the back plates.

Question: Do I have to drill and solder?
Answer: No, I prefer a built in killswitch casue it looks neater and clean, but if you want to play around without damaging your guitar. Check out Super Cameramans instructable.

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katsbls7 months ago
I have been building guitars for awhile and the kill switch is a cool idea but I am experamenting on using a switch with an LED built in. I installed a bunch of them on my cry baby (after I installed a 2nd and 3rd inductors- Fasels, as well as moding the electronics and puting in a new bypass switch on the stomp button), but since a Strat usually dosn't have active pickups I had to add a 9 volt battery to power the LEDS. Should be cool mod to a kill switch. If all goes well I will post instructions and wiring diagram. Keep up the good work.
GuitarX15 katsbls2 months ago

Hey I actually found a place that sells some of these with LEDs built in,

I got mine from Iron Age Guitar Accessories and installed it into my stratocaster.

It's been working well for a couple of months now, feels amazingly crisp and there are no popping sounds to speak of.

It's a bit pricey but it's definitely better than anything I've seen on the market.

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Way cool! I've always wanted to make one of these!

saguilar72 years ago
hey bro!! i have a kill switch but the problem is, my ampli got damage, i dont know why? its grounded!
gschtein2 years ago
Thanks so much bro! The sound is sick!
HEY AUTHOR OF THIS INSTRUCTABLE!! PLEASE LOOK HERE!! So do I solder one of the wires from the switch to the same contact on the volume pot that has the wire going to the input jack?? the one I have is a white wire. PLEASE RESPOND!!
itsachen (author)  chickencoop2132 years ago
Yes, you need to intercept the outgoing signal. Sorry about the delay.
what exact wire did you use?? i know nothing about wires and what kinds and such. can You tell me what brand and gauge etc.??
smatt13 years ago
WIll this mess up the tone of the guitar at all? Cause I'm about to do it.
itsachen (author)  smatt13 years ago
It will not.
smatt13 years ago
If I literally attach my wires to the spots shown, will it work? Or do I have to move any other wires than the ones on the switch?
itsachen (author)  smatt13 years ago
Yes. You just need to set up a connection between hot and ground.
kevlad773 years ago
Just bought a guitar with a killswitch,it has the guitars main hot wire cut right in half then one side spliced to a killswitch wire and the other half doing the same with the other wire and what appears to be a ground.It stopped working when I put on pickup mounting rings,anyone have any idea?
Hey, this is a really good set of instructions! But I was hoping you could help me out, this is my first guitar mod and i want to do it right the first time. I went to radio shack and bought a R13-24a-05 button-style kill switch, and i want to make sure this will work if i solder both tabs on it to the tabs on my output jack. This switch is an Off (On) switch, and thats where I get lost. Is that what I need? Or do I need On (Off)? Also, I bought a toggle switch (On Off) that i want to install while I'm in the guitar. What would the wiring look like if i installed them right next to eachother (between the volume and tone knobs on a Telecaster)? I definitely want to solder these to the output jack, not the volume. Thank you for any help -Shane
http://www.youtube.com/watch?v=1_8PZDKoNkY&list=FLpXVcS9keRjkPiisMtjYbTA&index=1&feature=plpp_video
Will this work for a Fender style guitar?
Ah man I am getting confused, am I pretty much putting the switch between the volume and output along the hot wire, or can I do this from the two prongs on the output jack?
dodla3 years ago
hey itsachen can u pls tell me how to make an external killswitch.i hv tried once using a toggle switch but i play a high gain patch like bulls on parade for scratching e heavy buzzing noise is coming
"push on" or "push off" momentary switch? I'd imagine "push off", but I want to be absolutely sure.
itsachen (author)  stevenvachon3 years ago
Push to make, or I guess "push on". When you push the circuit is closed. You want to short the signal on the push.
wardog3 years ago
tell me im crazy, im gonna install one for my electric-acoustic guitar XD haha the pick-ups are similar to the electric guitar.. will it work?
itsachen (author)  wardog3 years ago
It will work, but be warned!

1) Your circuitry might be different than a strat circuitry. If so, no fear, just bypass the hot and ground at the input jack

2) Using a killswitch on CLEAN settings makes a noticeable popping sound! This may make you not want to install it...
Sponnie3 years ago
Hi, thanks for the cool instructions. I just received my button but what's puzzling me is the nature of it's PUSH ON/OFF. When I push it there is a click and I assume it stays in the OFF position so I would have to push it and get it to click again to get the sound back ON? Don't they make buttons that just release when you release your finger so you'll never have to worry about leaving the sound OFF?
itsachen (author)  Sponnie3 years ago
Ah. Looks like you picked up a toggle button. What you want is a momentary switch
josh13243 years ago
You can just connect the switch between live and ground on the output jack in the guitar.
itsachen (author)  josh13243 years ago
Yep, this is just one way to find the signal and intercept it.
Yea, and the way i did it, was that i mounted the switch inside a project box and taped it to the body of the guitar. That way, if i change my mind, i can just take it off.
itsachen (author)  josh13243 years ago
Ah! Reminds me of this similar instructable:
http://www.instructables.com/id/Removable-Guitar-Killswitch/
stratattack4 years ago
When i touch the wire of the switch to the wire that goes to the output jack, my amp (which is connected to my guitar) makes a wierd, buzzing noise. Even if i use a noise gate it won't stop. Is this a normal thing? How do i fix it? If I will solder the wires, will the guitar still make that sound?
itsachen (author)  stratattack4 years ago
Are you making a connection between the hot output wire and the ground? This ensures a short, which would result in no sound.
I did the connections exactly like in the image above. When i connect one of the wires to the ground every thing sounds normal but when i connect the other wire to the output wire it makes a wierd, buzzing sound (like hum, but louder). But if i press the killswitch i get no sound at all (That means i did the connections properly). The only problem i have is that noise
It might be a bad switch, try using another one.
Would an spst toggle switch work? And how can you be sure where to make the connections so that it's on when flipped down and off when flipped up?
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It will work if you use one which has a 'on-off' or 'on-off-on' configuration.

On-Off (two way) - the sound will cut out when its in the off position.

On-Off-On (three way) - good because when the switch is accidentally turned on it doesnt cause embarrassment :P

Have Funn!!
you could probably just spin the switch around after you wire it up... or use alligator clips to find out what should be wired to get desired results...?
bspurrier4 years ago
The switch you recommended works great for my needs. One problem which is important to note, for those of us who don't own a strat, the switch's bushing is nowhere near deep enough to get through an archtop guitar. I tried this on my Schecter C-7 and now I have an empty hole in my guitar because I didn't think to measure the thickness of the wood in that spot. I'm going to have to carve a hold in the front of my guitar and put in a plate to hold my switches.

I opted for a two way toggle which switches between two seperate parallel circuits. One has a Normal Closed button, one is Normal Open. The electronics work great as is.
dtyler4 years ago
Would this be the kill switch I would need to use on a "Sky" Flying V design?

http://www.radioshack.com/product/index.jsp?productId=2062545&prodFindSrc=cart#
itsachen (author)  dtyler4 years ago
That switch looks right. The Flying V design might have a different circuit design than strat style guitars, so you might not be able to use this 'structable for your killswitch though :/

Theres an easy hack to get around this though. Just wire the switch so that it shorts the hot signal to the ground.
Azayles4 years ago
If you wanted to build this as an external unit, for example if you don't want to poke about in your guitar and risk damage, could you use a foot pedal which activates a zero-crossing switch circuit? For example, some chips used for muting audio signals use zero crossing circuits to eliminate clicks and pops.
Of course this means the unit will be active, and hence require batteries.
optocoupler could be used here.
tshipman4 years ago
thanks for making this! i just did it, drilling the hole was the hardest part, but it turned out great! it's going to be interesting messing around with it.
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