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How to Make a Homemade Cell Phone Muffler



Как сделать самодельный глушитель сотовых телефонов


After searching how to make a muffler of cell phones , I found what I was looking for in a blog from the team "Jammer Store Inc".

After reading it, I managed with making my own mobile muffler .

Sorry for the low-quality translation;)

These self-made devices are illegal in some countries, therefore, you use this instruction for your own fear and risk.

Technical details

Most mobile phones use the GSM800 mobile standard, so VCO (wide oscillator), we set the frequency range to 800 MHz. It can be quite difficult to set up the work properly without some skills and a good testing tool, but as a result you will have an effective VCO. (Many cell phones use GSM800 mobile standard to operate, so my VCO (sweeping oscillator) is tuned to the 800MHz frequency range. It may be quite difficult to make this one to work properly. will have the efficient VCO.)

I use a clock generator at 45MHz, as a noise and noise generator. This starts the local port of the oscillator that is in the mixer. The signal comes from the oscillator and passes through the resistance of the network in its path. This allows you to equate the resistance of the 45 MHz clock oscillator with the resistance of the mixer port. (I used clock oscillator for 45 MHz as the noise generator for this jammer.) The signal is going out from the local oscillator. equate the impedance of 45 MHz clock oscillator with the impedance of the mixer's port.)

This port acts as an RF input for the interference signal. The RF signal passes through the output amplifier to the mini-circuit. The output power is increased by an additional 15-16dBm. Then the output signal is fed to the RF antenna output. The RF input also has an antenna. (This port acts like the RF input of the signal jammer.) The output power is increased by additional 15-16dbm in this way. Then the output signal goes to the RF output antenna RF input has the antenna too.)

Using the Muffler

Why did I choose a 45 MHz clock? Because the GSM800 standards of transmitted and received signals are always divided by the exact number of frequencies and this is what the 45MHz. And now imagine: The user of the phone dials someone and the signal goes out. This signal has the frequency of the received cell phone signal, so the cell phone user will hear his own voice in the phone! :) (Why I chose 45MHz clock oscillator? Because GSM800 is transmitted by the exact number of frequency and it is that 45MHz. jammer modifies this signal and lets it go This signal has a frequency of a cell phone's received signal, so cell phone :) )

I should mention that it is this cell phone muffler that can be used to block the cell car signal from a tracking device that captures your GPS data and sends it to some bad guys. And it probably can even jam some IED signals if they are under the control of the mobile phone GSM800 group. (I should also mention that this particular cell phone can be used to block the signal, GSM800 band.)

But I hope that there will be no situation in this life, when this function will be necessary for me, or you, or someone else. (But I hope that there will be no situation in this life when that feature will be needed by me, or you, or anyone else.)

Photos and descriptions

Как сделать самодельный глушитель сотовых телефонов
The used mixer was originally made for 600 MHz, but I changed it a bit and it works fine at 800 MHz. (Used mixer was originally made for 600MHz but I modified it a little and it works for 800MHz.)

Как сделать самодельный глушитель сотовых телефонов
The amplifier does fantastic things with output power. Despite this, it attracts extra food, it's worth it. (The amplifier makes it happen.)

Как сделать самодельный глушитель сотовых телефонов
The jammer case was made from an old aluminum window and the UHF connectors I took from my old Motorola phones. (Jammer case was made from old aluminum box and UHF connectors I took from my old Motorola phone.)

Как сделать самодельный глушитель сотовых телефонов
These connectors must be soldered to the mini-circuit to work properly. (Those connectors must be soldered to the mini-circuit to work properly.)

Как сделать самодельный глушитель сотовых телефонов
To ensure this little interference, the signal of a nine-volt battery with a voltage regulator is enough. I separated it from other electronic components with polystyrene foam. (To supply this little signal jammer the nine volts battery with voltage regulator is enough.

Как сделать самодельный глушитель сотовых телефонов
Do not forget to make a power switch for your new creation. Oh, and attach the antennas to the UHF connectors. (Do not forget to make a power switch for your new creation.) Oh, and attach antennas to the UHF connectors.)

Как сделать самодельный глушитель сотовых телефонов
So it's ready! Use it wisely;) (So it is ready! Use it wisely;))

Silencer circuit

Как сделать самодельный глушитель сотовых телефонов