Cell phone jammers are installed at no confusion zones such although schools or colleges. calm how exactly does this implement jam prison phones? These jamming instruments block mobiles from receiving signals from the basis stations. although it can robust comparable a complicated process making your own prison phone jammer is no really a rocket science. You ought comprehend calm that at many countries, including the USA, they are illegal and mystery ought big federal fines and feasible criminal prosecution. Who knows what you people interfere with?
.
1) comprehend the working principles. This prison phone jammer operates at GSM800 frequency although most mobile phones avail it ought operate. consequently the selected VCO is a sweeping oscillator, which is same effective calm can exist difficult ought construct although the beginners without gay RF-testing equipment.
- As a noise source you can avail a 45MHz clock oscillator which is driving a Local Oscillator port located at a mini-circuit mixer. There is also an impedance matching network although the Local Oscillator sign ought pass along it. It is used ought equate impedances of the clock oscillator and the port of the mixer.
- RF input (which is this port of the mixer) connects ought the first 800MHz prison phone antenna, and the RF output is sent ought the mini-circuit amplifier. This amplifier increases the output energy although 15-16dbm. The amplified sign is then sent ought the second prison phone antenna.
2) comprehend how it works. vulgar prison phones which avail GSM800 consume their transmitted and received frequencies
always separated by 45MHz. consequently while the mobile phone tries ought call, it is blocked by its own sign returning ought it! Isnât that cool? while the phone blabber annoys you â grow your jammer at and that wrongdoer will hear own noise at his or her prison phone.
- Oh, by the way, you can also avail this mobile signal jammer ought block any cell-based tracking systems which avail your GPS ought explore and record your carâs moves. And it is fairly feasible ought jam IEDs which detonated using prison phones.
- The mixer used is designed ought occupation up ought 600MHz calm at this example it factory lovely well.
- RF amplifier is doing its occupation perfectly calm draws additional power.
3) avail an old aluminium box although a frame although the jammer and old UHF connectors from Motorola prison phone although input/output.
4) connect RF connectors ought the circuit.
5) avail a nine volt battery and voltage regulator ought supply vulgar components. lay the battery internal and separated by the foamed elastic from the other components.
- Place the energy on/off switch at 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!
