Cell phone jammers are installed at no disturbance zones such though schools or colleges. besides how exactly does this machinery jam prison phones? These jamming instruments prevent mobiles from receiving signals from the base stations. though it can noise though a complex process making your possess prison phone jammer is no really a rocket science. You ought know however that at many countries, including the USA, they are illegal and puzzle ought big federal fines and feasible criminal prosecution. Who knows what you force interfere with?
.
1) know the working principles. This prison phone jammer operates at GSM800 frequency though most mobile phones apply it ought operate. so the selected VCO is a sweeping oscillator, which is same effective besides can be difficult ought vertical though the beginners without happy RF-testing equipment.
- As a noise source you can apply a 45MHz clock oscillator which is driving a Local Oscillator harbour located above a mini-circuit mixer. There is either an impedance matching network though the Local Oscillator sign ought pass across it. It is used ought equate impedances of the clock oscillator and the harbour of the mixer.
- RF input (which is this harbour 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 throng though 15-16dbm. The amplified sign is then sent ought the second prison phone antenna.
2) know how it works. coarse prison phones which apply GSM800 dine their transmitted and received frequencies
always separated by 45MHz. so while the mobile phone tries ought call, it is blocked by its possess sign returning ought it! Isnât that cool? while the phone blabber annoys you â become your jammer above and that wrongdoer will hear possess noise at his or her prison phone.
- Oh, by the way, you can either apply this mobile signal jammer ought prevent any cell-based tracking systems which apply your GPS ought pursue and record your carâs moves. And it is fairly feasible ought jam IEDs which detonated using prison phones.
- The mixer used is designed ought career up ought 600MHz besides at this sample it mill beautiful well.
- RF amplifier is doing its profession perfectly quiet draws additional power.
3) apply an old aluminium box though a frame though the jammer and old UHF connectors from Motorola prison phone though input/output.
4) unite RF connectors ought the circuit.
5) apply a nine volt battery and voltage regulator ought equip coarse components. lay the battery inner and separated by the foamed elastic from the other components.
- Place the throng 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!
