Wireless guitars are great, without cables to trip on the life expectancy of an energetic guitarist is greatly increased.  However, they are expensive, way more expensive than wireless microphone systems.  In fact, if you're like me, you might happen to come into a wireless microphone system for free.  Using it for your guitar is a ultra-simple hack that almost anyone can do in less than an hour.  

Step 1: Tools and Materials

Tools required:
  • Soldering iron
  • Wire strippers
  • Drill and 3/8" bit
  • 1/2" wrench
Materials required:
  • 1/4" guitar jack
  • Solder
<p>I think the best idea would be to add the step down impedance transformer (as guitar is hi-z device ) right after the input jack in mic enclosure. This way your guitar should volume shouldn't need to be dialed out anymore. <br>I'm talking about sth like this, it's kinda penny-sized. <br><a href="http://www.neutrik.com/en/accessories/nte10-3" rel="nofollow">http://www.neutrik.com/en/accessories/nte10-3</a><br><br>I suppose you wouldn't need the low-&gt;high impedance matching transformer after input of the receiver as, while it has jack plug, it should be already hi-z.<br>Hope that would help.<br><br><br>Best Regards,</p><p>Adrian </p>
I think the original microphone was pretty high impedance as it was a condenser mic, just not as high-Z as the guitar is. a 2:1 or 3:1 transformer might improve the performance.
<p>oh I see. There's one more thing i think about - if it was condenser and had bias voltage on it then transformer would isolate pickups from being biased and therefore there would not be disturbance in their magnetic field. (I think there could be some) .<br></p>
Hi mat . . Your hack was absolutely easy and simply superb . . I have a question. Usually some presentation microphones come along with a wireless transmitter with an input for microphone jack. Can this transmitter be used directly to plug in the guitar cable ? Thanks
Most cheap microphones used now are a type called &quot;electret&quot; microphones, which have a built in transistor that amplifies the signal from a small condenser element into a more usable signal that is easier to work with. This is a good idea for sound but if you want to apply an electrical signal from a guitar instead, it is more difficult. The transmitter is expecting a signal that is probably 100x higher than the signal from the guitar, also there is a voltage being applied to the microphone jack so that the transistor can be powered, and some people say this can affect the sound of the guitar.<br><br>In short, it can be done, but with a wireless transmitter the volume may be too low. I have plugged my guitar into my PC mic port before and it works, but the sound quality is very bad and the volume and microphone boost must be maxed out to hear anything.<br><br>The reason this particular hack works is because this wireless microphone used a simple condensor microphone and not an electret, so the signal levels from the condenser and the guitar were of similar power.<br>
<p>Hi, pretty awesome hack! Do you think it could work with low frequencies from a bass guitar? </p>
<p>Should be fine. It might be filtered to minimize frequencies at 60Hz and below though.</p>
<p>Ok! Hope to test it asap and I'll let you know, thanks!</p>
Is it possible to solder a capacitor or resistor to the jack then the wires so that you can use the guitar at full volume?
You can add a resistor, but that would just be the same as turning the volume down, since your volume knob is just a resistor anyway, and it would be more permanent. You may want flexibility for different guitars and pickups.
<p>could you put a resistor in series with the jack so that you could turn up your guitar without the signal distorting? Also, is a dynamic microphone an electret or a condenser?</p>
I think possibly adding a load resistor would help reduce the voltage from the coils. Also, a dynamic mic is neither an electret or a condenser. Electrets are just a subset of condensers.<br><br>http://en.wikipedia.org/wiki/Microphone#Dynamic_microphone
wouldnt you be able to do the same thing with a guitar hero mic but instead of it being wireless wouldtnt you also be able to connect it to a computer per say?
Possibly. One thing is that it is important that the mic element is a condenser type, not an electret microphone element. Electrets have integrated amplifiers and require a DC offset voltage, meaning they will have a much higher voltage output than a guitar, and will put DC into your guitar coils which may not be good.<br><br>These problems can be solved with a small transistor amplifier circuit.<br><br>Also you would need a driver for your PC to be able to use the guitar hero mic on it.
do you know which kind the guitar hero mic is? thanks. <br>
Almost surely an electret. They are cheapest and used in 99% of microphone applications.<br>
really neat! <br>i like it! <br> <br>thanks for sharing!
My grandpa and i are actually doing the exact same thing right now.... I think even the same MIC's ... our problem is that lets say you want more than two MICs (i think the kit came with two mics and a receiver) if you bought 4 of these they use the same frequencies as each other and so one drowns out the other. Do you know of any fixes for that?
The system is basically just an AM radio and transmitter, so usually to modify the frequency you just open it up and bend an air-coil a bit to change the transmitter frequency, the problem is that the receiving coil must be bent in the exact same way to match, its a time consuming process. It could also end up ruining the mic or receiver if you can't ever get them to match up again. <br> <br>Also that would require modifying the receiver so now you would need 2 receivers for 4 mics.
Well done! With all of these great inventions under your belt you should start your own company! <br>
Yes I should. You are hired. 8 AM Monday.
That is an awesome way to make a wireless guitar. Totally original and simple, the marks of a great instructible.
Thanks very much :)

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