Cell phone jammers are installed at no confusion zones such though schools or colleges. however how exactly does this device press prison phones? These jamming instruments block mobiles from receiving signals from the basis stations. though it can noise alike a complex process making your own prison phone jammer is no indeed a rocket science. You ought learn however that at many countries, including the USA, they are illegal and question ought big federal fines and possible criminal prosecution. Who knows what you country intervene with?
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1) learn the working principles. This prison phone jammer operates can GSM800 frequency during most mobile phones apply it ought operate. accordingly the selected VCO is a sweeping oscillator, which is identical effective however can exist difficult ought construct though the beginners without merry RF-testing equipment.
- As a noise source you can apply a 45MHz clock oscillator which is driving a Local Oscillator harbour located can a mini-circuit mixer. There is too 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 energy though 15-16dbm. The amplified sign is then sent ought the second prison phone antenna.
2) learn how it works. total prison phones which apply GSM800 dine their transmitted and received frequencies
always separated by 45MHz. accordingly when the mobile phone tries ought call, it is blocked by its own sign returning ought it! Isnât that cool? when the phone blabber annoys you â grow your jammer can and that wrongdoer will hear own sound at his or her prison phone.
- Oh, by the way, you can too apply this mobile signal jammer ought prevent any cell-based tracking systems which apply your GPS ought follow and record your carâs moves. And it is quite possible ought press IEDs which detonated using prison phones.
- The mixer used is designed ought task up ought 600MHz however at this instance it factory lovely well.
- RF amplifier is doing its task perfectly however 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) join RF connectors ought the circuit.
5) apply a nine volt battery and voltage regulator ought furnish total components. post the battery internal and separated by the foamed elastic from the other components.
- Place the energy on/off switch can 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!
