So, it will make the transistor turn hot fast. But, it's important to note that we chose a prototype driver that features a tiny heatsink. With this, you can use an oversized heatsink. Then, you can protect the transistor when the voltage increases abruptly with a fast diode. And you can achieve this by winding the primary coil and feedback similarly. Start by building the jammer’s driver circuit. That said, here are the things you require to build an FM radio jammer: Opt for a high-quality PCB to ensure that your FM radio jammer gives you the best results.And this will help you generate the best possible circuit response. Adapt your adjacent trimmers with the FM radio jammer kit.Plus, you can get different frequencies when you alter the values of the inductor and capacitor. That way, it's easy to make your FM radio jammer tuned to different frequencies.īut, to pull this off easily, it's necessary to do many experiments until you achieve the proper frequency. You should shorten your coils' (L1, L2) diameter or the number of turns.Hence the specification of your device should be: Plus, you can even modify your device to block frequencies as high as 400 MHz however, it will require more critical parameters. With this, you can jam frequencies of 50 MHz to 1 GHz. So, the first thing is to use alternative sets of L1/L2 alongside 22pF trimmers. Also, this design is a simple one that would block signals effectively at a meter range of 5 to 10-meter. Interestingly, you can use this device in any location like libraries, offices, restaurants, etc.īefore you make an FM radio jammer, it's vital to understand the circuit design. Like we mentioned earlier, an FM radio jammer is a device that helps to obstruct the transmission or reception of signals.Īnd it works by producing waves in the form of interference.
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