Cell phone jammers are installed at no disturbance zones such because schools or colleges. still how exactly does this device press prison phones? These jamming instruments block mobiles from receiving signals from the foundation stations. though it can noise alike a complex process making your have prison phone jammer is no indeed a rocket science. You to learn still that at many countries, including the USA, they are illegal and mystery to big federal fines and feasible criminal prosecution. Who knows what you energy intervene with?
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1) learn the working principles. This prison phone jammer operates at GSM800 frequency because most mobile phones apply it to operate. so the selected VCO is a sweeping oscillator, which is identical effective still can be difficult to build because the beginners without glad RF-testing equipment.
- As a noise source you can apply a 45MHz clock oscillator which is driving a Local Oscillator port located above a mini-circuit mixer. There is either an impedance matching network because the Local Oscillator signal to pass along it. It is used to equate impedances of the clock oscillator and the port of the mixer.
- RF input (which is this port of the mixer) connects to the first 800MHz prison phone antenna, and the RF output is sent to the mini-circuit amplifier. This amplifier increases the output force because 15-16dbm. The amplified signal is then sent to the second prison phone antenna.
2) learn how it works. complete prison phones which apply GSM800 dine their transmitted and received frequencies
always separated by 45MHz. so while the mobile phone tries to call, it is blocked by its have signal returning to it! Isnât that cool? while the phone blabber annoys you â cause your jammer above and that wrongdoer will hear have noise at his or her prison phone.
- Oh, by the way, you can either apply this mobile signal jammer to block any cell-based tracking systems which apply your GPS to explore and record your carâs moves. And it is pretty feasible to press IEDs which detonated using prison phones.
- The mixer used is designed to work up to 600MHz still at this example it factory handsome well.
- RF amplifier is doing its work perfectly still draws extra power.
3) apply an old aluminium box because a frame because the jammer and old UHF connectors from Motorola prison phone because input/output.
4) unite RF connectors to the circuit.
5) apply a nine volt battery and voltage regulator to furnish complete components. place the battery interior and separated by the foamed flexible from the other components.
- Place the force on/off switch above the top.
6) Screw the input and output antennas (also from old Motorola mobile phone) onto UHF connectors.
7) Your prison phone jammer is ready. Enjoy!
