The emergence of a huge number of listening devices allows third parties to obtain information that no one should know about. But at the same time, equipment is developing that prevents unwanted guests from entering personal or business life. The simplest option of which is jammers for mobile phones, they are blockers and suppressants.

Exploitation

Blockers are used to protect privacy, to ensure confidentiality of conversations, and to maintain silence in public places where mobile phones cannot be used. Among the standards that the suppressor suppresses are GSM, GPS, 3G, 4G, less often bluetooth and wi-fi.

Jammer efficiency depends on several factors. The most common are the state of charge of the battery and the distance between the phone and the base station. In the first case, the battery must be full for normal operation. In the second, the quality of signal suppression is inversely proportional to the distance of the receiving device from the source. Influencing the latter does not seem realistic, it remains just to take this moment into account.

Depending on the power and available frequencies, jammers for mobile phones are able to stop the transmission of information from the following devices: GSM and GPS bugs, navigators, trackers and 3G Internet.

The devices protect against information leakage and unauthorized tracking of a person or his car.

Operated by jamming mobile phones is simple - to start, you need to charge, install antennas (if any) and, in fact, turn on. The first item is optional in appliances that provide for connection to a household outlet or car cigarette lighter.

Frequencies. To turn off unnecessary frequencies, just use the settings. This method also corrects the embedded frequency parameters, which makes it possible to intercept non-standard signals.

Range of action. The personal muffler of mobile phones has a short range of about 20 m. This zone is reduced by the presence of obstacles in the form of walls, so neighbors on the entrance will easily use wireless networks.

Checking the operation of the device (standard type)

Powerful stationary suppressor

How much does a jammer cost for mobile communications? The purchase of the simplest option with one frequency range will cost approximately 4-5 thousand rubles. The more standards, and hence the means of communication, are capable of paralyzing the device, the higher the price will be.

Products designed for mass use are already selling for hundreds of thousands. For private use, the functions of a product worth over twenty thousand are hardly useful anymore. In addition, the question arises about the legality of the operation of the equipment.

Legality. What is strictly forbidden is to invade someone else's privacy. And stopping unauthorized attacks means protecting personal space, here the law supports the user. But, as soon as the effect of a personal suppressor spreads to gadgets and similar devices of other people, the situation changes in the opposite direction. The average person has no right to do this.

Device features and settings

There are three principles of operation of mufflers that suppress the communication of gadgets and bugs with base stations. In domestic conditions, the most convenient second type.

Types of signal jamming:

1. sending a signal to the phone or a bug causing a malfunction;
2. the creation of radio interference that blocks the signal;
3. imprisonment in an electromagnetic shield suppressing signals in both directions.

Device device. A mobile jammer that generates interference has three main components. The main component is a voltage controlled generator, which creates a connection with the suppressed equipment. An open or closed loop circuit allows you to tune the frequency. The generated signal is propagated by the antenna.

Expand the coverage area the connection of the RF amplification unit will help. This will increase the power of action and the coverage area, but the operating time will be reduced. Homemade device tunes once to selected frequency bands, unlike most industrial products.

Sometimes a charged and turned on jammer does not paralyze calls, mobile Internet and other activities, or functions at a minimum distance. This suggests that the telecom operator is using non-standard frequencies. The problem is solved by adjusting the settings of the blocker, if such a function is provided by the manufacturer.

Instrument board

There are two resistors in the diagram - regulating the upper and lower boundaries. The desired one is rotated either to the right to increase, or to the left to decrease the frequency. It is important to remember that this method is intended for professionals and in the event of a breakdown, the blocker is not subject to warranty service.

When using a muffler, it is necessary to isolate third parties from its influence. The exception is confidential negotiations and maintaining order in places where telephone conversations are prohibited. Technologies are designed to protect against information leakage, surveillance, and they cope with this task.

With the advent of mobile phones, communication between people has become much easier. Mobile phones allow you to save a huge amount of time, quickly resolve important issues and simply maintain pleasant communication with a loved one who is at a distance. However, thanks to various spy devices, a personal mobile phone can turn from a faithful assistant into a source of constant leakage of personal information, which can lead to serious problems.

Nowadays, in order to become the owner of a device that listens to mobile phones, it is not at all necessary to be a special agent or intelligence officer. Anyone who wants both on the Internet and in specialized stores, he can buy bugs and install them anywhere.

Fortunately, protect your personal information and phone from illegal intrusion is simple enough. To do this, you must have jammers cellular communication and jammers for GSM and GLONASS signals. Fortunately, in order to protect yourself, you do not need to buy such devices. Experienced radio amateurs are quite capable of assembling devices that suppress cellular signals with their own hands. We will talk in this article about how the jammers of telephone signals work, what they can and how to make them yourself.

Jammers for GPS and GSM communications work on a fairly simple principle. When telephone signals are in range of the jammer, interference occurs that blocks the ability to receive and send calls from mobile devices.

Jammers GSM and GLONASS signals, in turn, work on a different principle. They scan frequencies for a specific signal, and as soon as it appears, the device begins to interfere and block the signal.

The difference between cellular jammers

The work of GPS and GSM jammers is primarily distinguished by the range. The simplest signal suppressors work within a radius of 10 meters and will only be effective in a car. More sophisticated devices are designed for a range of 50 meters. This is quite enough to protect yourself from "bugs" in large rooms. There are also devices, allowing to jam signals within a radius of several kilometers, but such equipment is used exclusively by special services.

Installation and use of the jammer

The installation diagram of the signal suppressor is very simple. It is necessary to screw the antenna into the connector of the device and turn it on. After switching on for 10 seconds, the device will muffle all detected signals. The signal blocker is able to work from the network and in stand-alone mode. It also charges easily from a car cigarette lighter.

Sometimes a situation arises when the jammer of telephone, GSM and GPS signals does not work well when you turn on the jammer, does not find the necessary frequencies or something like that. This happens when mobile operators use other frequencies. In order for the device to pick up all frequencies, you must do the following:

• Remove the switch;
• Unscrew the antenna;
• Remove the cover of the device;
• Remove the microcircuit of the device;

· To adjust the cleanliness, use a screwdriver on the microcircuit to tighten the trimmer.

The legality of the use of communication suppressors

According to the Law "On Communications", which is valid in our country, any devices jamming mobile phones or other devices are subject to mandatory certification and registration. And if a certificate can be obtained from sellers upon purchase, then you need to register the device yourself. In case of non-compliance with the rules of the current law, violators face a fine, and the use of the device is considered illegal. Although it is worth noting that illegal use of such devices is very rarely brought to justice, and even when it comes to the preservation of personal information, such conditions are justified.

Who can listen to you

Install bugs and wiretap your phones maybe even schoolchildren. It is very easy to buy listening devices on the Internet. But basically, law enforcement officers usually resort to using "wiretapping", wanting to get dirt on criminals, influential businessmen who want to eliminate competitors, jealous husbands who suspect their wives of treason, and so on. Therefore, in order not to become a victim it is necessary to protect yourself from information leakage using signal suppressors.

How to make a phone jammer with your own hands

On the Internet, you can find quite different schemes, with the help of which you can design an effective jammer of GPS and GSM signals yourself. The most common telephone jammer operates at 800 MHz. Since most mobile phones are tuned to this frequency. Despite the simplicity of the principle of operation of the device, certain skills are required for its self-assembly.

In order to make your own home jammer of GSM and GPS signals, you need to take a synchronous signal generator with a frequency of 45 MHz, to which the local oscillator port responds. As a result, interference appears. Further, on the generator, the antenna is tuned to a frequency of 800 MGC. After that, the RF output is connected to the amplifier, due to which the power of the device increases to 16 dBm. Further, already amplified signal is fed to the antenna of the device. The final stage of self-assembly of the device is considered to be a self-made case, into which a battery is installed, and a switch is also created. In general, a complete signal suppressor will consist mainly of:

• Voltage controlled generator (VCO);
• Amplifying stage;
• Source of interference;
• Superstructure scheme;
• Antennas.

A diagram of one of these devices is presented below:

Conclusion

From the above, it becomes clear that a cell phone jammer in the modern high-tech world is a very useful device that will help preserve personal information and protect you from a huge number of unpleasant situations. It is very easy to buy such a device today., and if you are also an experienced radio amateur, then you can easily assemble such a device yourself.

Cell jammers use cases

Cell phone jammers are used to jam channels wireless communication standards 3G, 4G, Bt, Wi-fi, glonass / gps in places where the use of these channels is prohibited or not desirable.

Also, cellular suppressors can be used as a means of protecting conversations from eavesdropping, both separately and in systems of comprehensive protection of conversations in offices.

It is known that the microphone of a cell phone can be remotely activated using special equipment and listen to all conversations taking place in the room where the cell phone is located. Therefore, your phone is a modern information retrieval device ("bug"), which must be protected from eavesdropping if the confidentiality of your conversations is important to you.

How to choose a jammer for cell phones?

Choose by range

The range of action of various models of devices for suppressing cellular communications can be from 2x to 50 meters. The range depends on the power of the device, as well as on the proximity of the location of the base station of cellular operators to the place of work of the phone jammer. That is, the range of cellular suppression for different telecom operators will be different.

The same suppressor located in different parts buildings, will give different results of suppression for different mobile operators, due to the fact that the signal level from the base station of the mobile operator will differ at different points in the building.

The more powerful the jammer, the more expensive it is. To understand how the communication blocker will actually work on your territory, you need to test it on the spot, since under different conditions it will show a different range of action.

By the principle of action

Jammers of cellular communications and mobile phones can be circular and directional, that is, they can work both in diameter around the device and in a radius in a certain segment. Therefore, it is necessary to take into account the radius and direction of the device when choosing it.

By execution

In order to take into account all the possibilities of using suppressors, they are created portable, stationary and outdoor.

Portable miniature phone jammers

You can take it with you to a meeting.

Model Berkut-12 is a new portable cellular jammer that suppresses glonass / gps tracking systems.

Stationary jammers for cell phones and communications

They are installed in rooms - at points covering, by the range of the device, the entire zone necessary for jamming.

Street blockers of cellular communication

Most often, the UFSIN is used for installation outside and suppressing cellular communications inside buildings. The most common pattern is Barrier 4+

our company provides in Moscow a service for testing jammers of wireless communication channels... For all other regions of Russia, the device will be returned within 2 weeks in case of insufficient power.

Popular models of phone jammers

The most demanded of Russian cellular jammers are Mosaic, Kedr, Quartet, LGSh and Barkhan devices.

The main difference between these devices is in the number of suppressed ranges and standards of communication systems, the output power for each suppression channel, the ability to adjust the range, and the type of antenna system.

• Jammers for cell phones Kedr and Barkhan use built-in antennas and look like compact neat blocks, unlike LGS and Mosaic. But the Barkhan, unlike the Cedar, can be equipped with a 5GHz wi-fi suppression channel.
• Jammer LGSh-719 the antenna system is external, but it is possible to disable any of the cellular communication channels. However, LGSh lacks a 5GHz wi-fi blocking channel (like Mosaic).
• Suppressor Quartets are often in demand due to their low cost, especially in educational institutions. But, unfortunately, they also a lot of returns due to low power output and, consequently, low efficiency.

Non-standard phone jammers

Unlike standard phone jammers, the smart jammer automatically generates a signal for a specific location. This allows you to reduce the total energy emitted by the device and at the same time create the signal level necessary to block cellular communication even in the most difficult conditions, where standard blockers are not suitable. The price of these devices starts from 1 million rubles.

To eliminate the problem associated with tracking, you will need a communication jammer device that suppresses the navigator, and also introduces certain interference in the process of its operation. Such jammers are sold in an electronics store, or they are created with their own hands with certain knowledge in the field of radio engineering.

What does a jammer consist of?

The jammer, as in the photo, consists of certain elements:

• Generator for voltage regulation, by means of which the overvoltage of the entire system is removed and the prevention of combustion. It also enhances the current flow, while maintaining the performance of the whole system at any voltage.
• Antenna. This device uses a variety of types of transmitting elements, but a more suitable SMA, which gives the maximum coverage area, and also operates in the desired frequency mode.
• Amplifier. A certain part of the circuit that is responsible for delivering the strongest signal.
• Scheme. This element includes a generator as well as a coil. The first produces vibrations that are gradually transmitted to the coil.

For the smooth functioning of the gadget and the elimination of jamming of communication, you will need to wind the required number of turns. The duration of the device's operation and the amplification factor directly depend on the correct choice of the core.

The design provides for other details, thanks to which it functions in different modes:

• interference in the functioning of tracking devices, which makes it possible to remove a phone or a car from the radar screens;
• changing the signal so that it conveys distorted information.

Photos of jammers with your own hands

A cellular jammer is a device that allows you to jam the signal of a mobile phone. Devices can also be used to suppress other impulses.

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Principle of operation

The principle of operation of GPS blockers is simple. The device works by emitting a special pulse within a certain frequency, like a device that needs to be muffled. A special field is formed around the suppressive blocker, impulses emitted by other devices are lost in it.

Types of jammers by form factor

Consider the types of suppression devices by form factor.

Stationary jammers

These devices are designed for permanent use in a specific location. In order to ensure the working condition, the device must be connected to a household network. The weight of such a device is up to 5 kilograms. A distinctive feature of the systems is the ability to simultaneously generate an overwhelming field in several frequency ranges. Their number will be 10 or more.

User ul sound spoke about the work of a stationary communication jammer, made by himself.

Portable jammers

Portable devices are less powerful, but they are small in size, so they can be carried in a pocket and activated when needed. The jammer's weight is about 300-700 grams. V portable devices from three to six antennas can be used, which are designed to suppress different frequency ranges. The average operating time of this type of telephone muffler is one to three hours.

Lock cases

On sale you can find special blockers made in the form of covers. They were originally designed so that mobile operators could not track the location of the subscriber. In such cases, as a rule, several compartments are used. One of them is needed to block impulses, while the other is used to protect the human body from harmful radiation.

Scope and Suppressor Ranges

Let's take a closer look at the purpose and scope of the devices.

cellular

Radio jammers can be used in business meetings, theaters and any other place where silence is required. In large cities, administrations of cultural institutions often use simple blockers. If a person forgot to turn off his mobile phone at an important event, then the GSM phone jammer will not allow him to use the device.

Jamming devices are also used to prevent wiretapping by means of GSM bugs.

The ranges in which the cellular jammer works:

• from 925 to 960 MHz in GSM 900;
• from 1805 to 1880 MHz in the GSM 1800 range;
• from 2110 to 2170 MHz in the 3G range;
• from 2570 to 2690 MHz when operating in the 4G WIMAX band;
• 791 to 820 MHz in the 4G Lite band;
• from 850 to 894 MHz in the CDMA range, but since 2010 this range has not been used by domestic operators;
• the device operates in the range from 1900 to 1930 MHz, this standard is not used in Russia.

How-todo showed what a homemade cell phone jammer looks like.

Wi-Fi / Bluetooth

Devices of this kind are usually combined in one device with gadgets designed to suppress mobile communications. Used to block channels for transmitting information over wireless cameras... This provides reliable protection against data leakage. If such a blocker is used in a building, then in addition to cameras, routers and other wireless devices, for example, mice and keyboards, will be inoperative. Also, users will not be able to transfer data via Bluetooth. The operating frequency range of such devices is from 2400 to 2500 MHz.

GPS / Glonass

They are often installed on the working machines of courier companies, as well as companies involved in cargo transportation. Their use allows you to control the location of the vehicle. Anti-trackers are used to suppress the signal of such beacons. This device is small in size, designed to connect to the car's cigarette lighter and block the impulses of the GLONASS and GPS systems. Some device models can be equipped with a GSM plug. Such devices are used by hijackers to prevent the possibility of tracking a stolen car.

Working ranges:

• 1570 to 1620 MHz for GPS L1;
• from 1200 to 1310 MHz in the GLONASS L2 or GPS range;
• from 1380 to 1410 MHz in the GLONASS L3 or GPS band.

Radio

On sale you can find devices designed to jam radio signals. In stores, they are called "Antishanson". Suitable for blocking the operation of the corresponding radio stations. They can be used in fixed-route taxis, buses, as well as in institutions where chanson is listened to. The operating range is 88 to 108 MHz.

User Ivan Kuznetsov in the video talked about the assembly features, and also showed the principle of operation of the radio communication jammer.

Audio recording

Devices are commercially available that are designed to generate noise from microphones.

There are several options for blocking recording:

1. Ultrasonic. The gadget creates ultrasound that a person cannot hear, but can interfere. It blocks voice recording, carried out using a dictaphone or smartphone.
2. Acoustic. Such a device creates a disturbance that the human ear perceives as a chorus of voices.

Sound blockers are usually sold in speaker enclosures and are easy to integrate into the interior. The weight of the device on average varies in the region of several kg. You need to control the device using a special remote control.

For signaling

The jammer can be used to suppress signals transmitted from the remote control to the car alarm control unit. This will prevent the possibility of activating or deactivating the anti-theft system at a certain frequency. If necessary, you can use a device that will not only prevent the transmission of a signal, but also disable the equipment.

The operating frequency range is 315-433 MHz. Many household appliances operate at this frequency. Therefore, when the blocker is activated, other devices may become inoperative. The range depends on the manufacturer, but on average it is up to 100 meters.

Is the application legal?

The legality of use is determined by a specific state. Russian legislation is more loyal, therefore, it is not prohibited to use cellular jammers on the territory of our country.

In the United States, for the use of such devices, a person faces a serious fine, up to 50 thousand dollars.

Suppressor installation and operation

To use the device, you need to install the antenna adapter into the corresponding connector. The signal blocking process will begin 10 seconds after the equipment is activated. Depending on the type of devices, the range and principle of activation will be different. The device can work both autonomously and from a household network. If the device is car, then it must be installed in the cigarette lighter. Standalone devices can run on batteries, so the battery will need to be recharged from time to time.

Some blockers, after activation, work weakly and cannot perform their main function. Or they block signals, but the action applies to a specific provider. This means that the mobile operator is using different frequencies.

You can learn about the peculiarities of using plugs from the video provided by the Cargo 300 channel.

To ensure a full working condition, you need to do the following:

1. Dismantle the switch.
2. Unscrew the antenna adapter and remove it from its seat.
3. Remove the bollard cover. For removal, there are special fasteners or bolts on the case, which are unscrewed with a screwdriver.
4. Remove the board from the device.
5. There is a trimmer resistor on the circuit, it is used to work under conditions of a certain frequency. The resistor element must be tightened with a screwdriver.

How to do it yourself?

To make a muffler, you need a oscillating frequency generator. A generator device is also needed to create interference, the device must work to extract pulses at 45 MHz. This generator includes receiver ports that are found on the board. To ensure resistance stabilization, the pulse that comes from the local oscillator passes through a special matching network. The device port is connected to the antenna adapter, it is used as a radio frequency input. And the output of the pulse is directed to the amplifier. Subsequently, the amplified signal is fed to the antenna.

The assembly procedure is performed like this:

1. Prepare the enclosure. An aluminum block is suitable for this.
2. Our example uses connectors from an old Motorolla phone as output and input.
3. The plugs are soldered to the outputs on the microcircuit, which is used as a base.
4. A voltage regulator is mounted in the device body. Installation is also performed battery, it should work from 9 volts. The battery must be separated from other components on the board, this will prevent short circuits.
5. The antenna adapter is being mounted to the inputs. The switch of the device is connected to the power circuit.