Cellular jammer using improvised means. Using mobile phone jammers

A telephone jammer is a compact and reliable companion in business centers, conference rooms, cultural institutions, medical institutions and even in private homes. If you do not want any method of communication to be available at a specific time in a specific place, activate the jammer cell phones, Wi-Fi, 3G. Depending on the device model, you can choose to suppress one or more communication channels within a certain radius.

The TechYou catalog presents equipment in a wide price range with different functionality: conversation protection systems, silencers cellular communications, microphone jammers, noise generators, Internet signal jammers wireless type, voice recorder jammer and much more.

Signal jammers of stationary or compact type work effectively indoors or outdoors. They allow you to suppress up to four frequency ranges simultaneously or selectively. Depending on the location of the base station, the range of such devices can be up to 300 m.

If you are looking powerful tool jamming, we recommend buying a cell phone jammer, a suppressor of wireless network signals in modern formats 3G, Wi-Fi, as well as GSM 900 and GSM 1800. The equipment can operate in close proximity to base stations, among large quantity reinforced concrete structures.

Powerful mufflers are indispensable in the following situations:

• to ensure confidentiality and protection against information leakage - at defense enterprises, in meeting rooms, and research institutes of particularly important profile;
• to ensure silence - in theaters, libraries, at scientific conferences;
• to prevent negative influence networks for equipment operation - in medical institutions, testing centers, laboratories.

It is also worth noting that a mobile jammer is your personal security guard. If you are planning a private meeting or important negotiations, use this device to maintain the confidentiality of the conversation.

TechYou - guarding your safety

The issue of security worries many today. Information leaks are one of the main problems of both individuals and entire companies. And if physical protection is guaranteed by security, then unauthorized receipt of data cannot always be noticed. But it can be prevented, and TechYou can help you with this.

A simple jammer for voice recorders and other recording devices should be in your arsenal when negotiating. If you trust your partners, this does not mean that a listening device will not be found in the room. Your conversation may be interesting to a large circle of strangers, believe me!

Stationary signal jamming devices - perfect solution for large companies. How often do you want to keep some information secret when conducting important meetings, negotiations, meetings with top managers? And bug jammers will help you with this. With our technology you don't have to worry about data leaks. They simply won’t be able to overhear you if you use signal jammers.

Devices from the TechYou store cannot be installed wireless communication in their coverage area, as well as listen to or transmit your private conversation via communication channels.

Dear customers, when purchasing and using a jammer, make sure that it does not disturb others and works only within the limits that ensure your personal safety and does not create problems for other citizens in receiving communication services. If the device's effect extends beyond your premises, we will replace the device with a less powerful one. You can also reduce the operating range of the device by shielding it... Remember that by using this device for self-defense purposes (protection from eavesdropping, etc.), you are not violating anything, but if you deprive 3rd parties of the opportunity to receive communications, you are violating law . The device is intended for use ONLY in an enclosed area and should not crush telephones outside the area. When using this device, make sure that all persons in the room agree that there is no cellular service.

How to reduce the operating range of a device by shielding it?

To reduce range gsm work jammers it must be shielded. Under no circumstances should you shield individual parts of the device (antennas, etc.), this will damage it (tested). For complete shielding, take cardboard box, slightly larger than the suppressor (20-30%), so that it fits freely there and completely wrap it in foil. You can use regular food foil. The more times you wrap the box, the bigger screen You will create, so you need to select the number of revolutions experimentally based on the size of your room. Signal suppression should only occur within your premises and should not extend beyond it. Any wall also acts as a screen and extinguishes the effect of the suppressor. Since the device produces circular radiation, for a uniform distribution of radiation it is most correct to place it in the center of the room. Unfortunately, this is not always possible, so we recommend placing the suppressor under the ceiling in the center of the room. If you placed the device on the wall of the room, then to protect the room behind the wall, we recommend that you place a metal sheet 1-2 mm thick at the place where the suppressor is placed or stick 10-15 layers of foil measuring 100 x 100 cm on the wall. This will significantly reduce the likelihood of penetration radiation into the next room. We also DO NOT RECOMMEND the constant use of a suppressor - this is very harmful to the devices, please turn them on only in right moment, when you have negotiations, exams or a service (church) The use of communication suppressors is regulated: " RULES FOR REGISTRATION OF RADIO ELECTRONIC EQUIPMENT AND HIGH FREQUENCY DEVICES"When purchasing, please read these rules.

Every day we are surrounded by more and more technology that works using wireless networks: mobile phones, smart home gadgets, car alarms, unmanned aerial vehicles.

Unfortunately, such devices are easy to damage. A simple device for a few thousand rubles can neutralize burglar alarm or cut off cellular communications in the entire office.

If you live in Moscow, you see this regularly in the city center.

In this article you will learn what types of household radio frequency suppressors there are and for what purposes they are used.

Warning

“Jammers” can be easily purchased on the Internet, but they should only be used with the permission of Roskomnadzor. More details about the process of registering radio frequency suppressors can be found in the document Registration of RES and RF.

Responsibility for violating the rules registration of RES and VHF is prescribed in Article 13.4. Code of Administrative Offenses of the Russian Federation. Violation of the rules for the design, construction, installation, registration or operation of radio-electronic equipment and (or) high-frequency devices. For individuals threatens fine up to 500 rubles and confiscation of the device.

How do RF jammers work?

The general operating principle of all jammers is very simple: they emit a signal in the same frequency range as the device that needs to be jammed. A “white noise” field is created around the jammer, in which signals from other sources are lost.

Types of jammers by form factor

Stationary jammers. Such devices are designed for constant use in one place and require a network connection to operate. They weigh several kilograms and can simultaneously generate “white noise” on ten or more radio frequency bands.

Portable jammers. Such devices can be carried in your pocket and discreetly turned on as needed, without attracting the attention of others. Time battery life such a device 1-3 hours.

Portable jammers weigh on average 300-700 grams and combine 3-6 antennas to suppress different radio frequency ranges.

Blocking cases. Since the 90s, there have been many legends about the “police mode” built into every GSM phone, which allows the cellular operator to monitor the movements and listen to the conversations of any subscriber.

Typically these cases have two compartments. The first compartment is designed to completely block signals, and the second to protect against harmful radiation.

In many countries around the world, high-ranking officials and intelligence officers use specially assembled mobile phones. In Russia, employees of secret agencies are issued crypto phones SMP-ATLAS/2 and M-549M.

Now let’s take a closer look at why signal suppression is used in practice at different frequency ranges.

cellular

In most cases, cellular jammers are purchased to protect premises from wiretapping using GSM bugs. Suppressor mobile communications You can create silence in the hall at a public event by blocking incoming calls.

Perhaps our country will soon pass a law according to which cellular jammers will be installed in prisons, schools during the Unified State Exam, in university auditoriums, theaters and other public places.

Frequency ranges:
GSM900: 925-960 MHz
GSM1800: 1805-1880 MHz
3G: 2110-2170 MHz
4G WIMAX: 2570-2690 MHz
4G LTE: 791-820 MHz
CDMA800: 850-894 MHz ( Not used by Russian mobile operators since 2010)
PHS: 1900-1930 MHz (legacy standard, formerly used in China and Japan)

Wi-Fi/Bluetooth

Such jammers are often combined in one device with cellular jammers. They are designed to block data transmission channels of wireless cameras. This provides additional protection against information leaks.

If such a jammer is active in the room, then in addition to the cameras covert surveillance Routers don't work wireless keyboards and mice.

Frequency range:
Wi-Fi/Bluetooth: 2400 – 2500 MHz

GPS/Glonass

Company cars of truck drivers and couriers are sometimes equipped with GPS trackers, which allow the employer to monitor the location of the employee. But you can protect yourself from such surveillance using an anti-tracker.

A GPS anti-tracker is a small device that is installed in a car's cigarette lighter and blocks signals. GPS satellites and GLONASS. Some anti-trackers also include a GSM jammer.

GPS and Glonass jammers are also used by car thieves to protect against surveillance of a stolen car.

Frequency ranges:
GPS L1: 1570-1620 MHz
GPS and GLONASS L2: 1200-1310 MHz
GPS and GLONASS L3: 1380-1410 MHz

Radio

In online stores they are sold under the life-like name “Antishanson”. Such jammers will be useful in minibuses, taxis, shops and other habitats of Radio Dacha and Retro FM listeners.

Frequency range:

FM: 88-108MHz

MP3 players with FM transmitters are also used to counter chanson and troll drivers. With their help, you can not just turn off the radio, but force the entire minibus to listen to your favorite tracks.

Audio recording

Microphone jammers are included in a comprehensive anti-wiretapping protection kit along with cellular and Wi-Fi/Bluetooth jammers. There are two ways to prevent audio recording:

Ultrasonic suppression. The device generates ultrasound, which is not perceived by human hearing, but creates interference that blocks recording from smartphones and pocket voice recorders.

Acoustic suppression. The device generates a “choir of voices” interference that is audible to humans.

A “microphone jammer” usually weighs several kilograms and looks like regular column and looks organically in the interior. It is controlled using the remote control remote control, which can be hidden in your pocket.

How are jammers camouflaged?

To suppress radio signals unnoticed by others, online stores sell jammers camouflaged as various objects. Portable jammers with a range of up to 15 meters are disguised as purses or packs of cigarettes, and more powerful universal jammers are disguised as briefcases, diplomats or interior parts.

For a long time now, people interested in radio electronics have been looking for various schemes and instructions for assembling some fancy device for personal use. I am also among these people. While surfing the Internet, I found an article by the Jammer company called Instructions: How to Make Your Own Cellular Jammer. After reading it and looking at the diagrams, I became eager to do something similar for myself.

Because their instructions had all the information I needed, including diagrams and technical data. I thought of some details myself, and in the end I made my own cell phone suppressor. Below I have described the entire process.

This blocker mobile signals operates at a frequency of 800 MHz because many mobile phones operate at this frequency. So I used a sweep generator as a VCO. It works just fine, but if you are new to radio electronics, assemble such a part without good tools It will be quite difficult for you.

The 45 MHz clock generator I used as a jammer drives the on-chip local oscillator port of the receiver. To equalize the resistance of the local oscillator port and the clock generator, the local oscillator signal of the receiver passes through an impedance matching network.

The local oscillator port, which is the RF input, is connected to the 800 MHz antenna, and the RF output is first sent to a special signal amplifier, which increases the output power of the device by 15-16 dBm. After that amplified signal fed to the output antenna.

Frequencies of the received and sent signal of all mobile phones, operating at a frequency of 800 MHz, always differ from each other by exactly 45 MHz. So when your cell phone blocker is turned on, anyone talking loudly on the phone will only hear their own voice on the phone because their own signal will be returned to him or her.

You should also remember that this cell phone jammer blocks signals from tracking devices that use GPS navigation Your car for tracking and a cellular frequency for recording the received data, in other words, you can also assemble a GPS jammer. This suppression device can also be used to prevent the explosion of homemade bombs that are detonated using a signal from a regular cell phone.

In this device I used a 600 MHz frequency converter, having previously improved it.

There is no escape from using an RF amplifier, despite the increased power consumption.

I took old aluminum packaging and made a case out of it, and used old VHF connectors from a Motorola phone for input and output.

I soldered the VHF connectors to the chip used.

I used a voltage regulator and a 9V battery to power this mobile signal suppressor. The battery was separated with foam from the rest of the device.

I installed an on/off switch on the case, and screwed the antennas to the VHF connectors (they, by the way, are from the same Motorola).

That's it, your cellular blocker is ready!

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

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Principle of operation

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

Types of jammers by form factor

Let's consider the types of suppression devices by form factor.

Stationary jammers

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

User ul sound talked about the operation of a stationary communication jammer made independently.

Portable jammers

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

Covers-blockers

On sale you can find special blockers manufactured in the form of covers. They were originally developed to prevent mobile operators from tracking the subscriber's location. Such cases usually use several compartments. One of them is needed to block impulses, and the other is used for protection human body from harmful radiation.

Scope of application and ranges of suppressors

Let us consider in detail the purpose and scope of application of the devices.

cellular

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

Devices that allow you to jam the signal are also used to prevent wiretapping, which is carried out through GSM bugs.

Ranges in which the cellular jammer operates:

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

The How-todo channel showed what a homemade cellular 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 information transmission channels via wireless cameras. This allows us to ensure reliable protection from data leakage. If such a blocker is used in a building, then in addition to cameras, routers and other devices will be inoperable. wireless devices, for example, mice and keyboards. 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

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

Working ranges:

• from 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 range.

Radio

On sale you can find devices designed to jam radio signals. In stores they are called “Antishanson”. Suitable for blocking the operation of corresponding radio stations. Can be used in minibus taxis, buses, as well as establishments where they listen to chanson. The operating range is from 88 to 108 MHz.

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

Audio recording

There are commercially available devices designed to generate interference with microphones.

There are several options for blocking a record:

1. Ultrasonic. The gadget creates ultrasound, which a person cannot hear, but can cause interference. It blocks voice recording made using a voice recorder or smartphone.
2. Acoustic. Such a device creates interference, which the human ear perceives as a choir of voices.

Sound blockers are usually sold in speaker housings and are easy to integrate into your interior. The average weight of the device varies around several kg. The device must be controlled using a special remote control.

For signaling

A jammer can be used to suppress signals transmitted from the remote control to the car alarm control unit. This will prevent the possibility of the anti-theft system turning on or off at a certain frequency. If necessary, you can use a device that will not only prevent the signal from being transmitted, but will also damage the equipment.

The operating frequency range is 315-433 MHz. Many people operate at this frequency. Appliances. 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 it legal to use?

Legality of use is determined by the specific state. Russian legislation is more lenient, so the use of cellular jammers in our country is not prohibited.

In the United States, a person faces a serious fine of up to $50,000 for using such devices.

Suppressor Installation and Operation

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

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

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

To ensure full working condition, you must do the following:

1. Remove the switch.
2. Unscrew the antenna adapter and remove it from its seat.
3. Remove the blocker cover. For removal, there are special fasteners or bolts on the case that can be unscrewed with a screwdriver.
4. Remove the board from the device.
5. There is a tuning resistor on the circuit; it is used to operate at a certain frequency. The resistor element must be tightened with a screwdriver.

How to do it yourself?

To make a muffler, you will need a frequency swing generator device. A generator device is also required to create interference; the device must operate to generate pulses at 45 MHz. This generator includes receiver ports that are on the board. To ensure resistance stabilization, the pulse that comes from the local oscillator passes through ad hoc network approvals The device port is connected to the antenna adapter and is used as an RF input. And the pulse output is sent to the amplifier. Subsequently, the amplified signal is sent to the antenna.

The assembly procedure goes like this:

1. Prepare the body. 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 carried out battery, it should run on 9 Volts. The battery must be separated from other components on the board to prevent short circuits.
5. The antenna adapter is being installed to the inputs. The device switch is connected to the power circuit.

Cell phone jammers, as cellular signal suppressors are commonly called, are an affordable and reliable tool with which you can prevent the leakage of information of varying degrees of significance. IN modern world A variety of tracking devices have become all too common, making it increasingly difficult to maintain the secrecy of commercial and other information not intended for public scrutiny. Mobile phone jammers were created specifically to ensure confidentiality and non-distribution of important data.

Also, cell phone jammers are designed to maintain the established order of stay in some in public places: libraries, theaters, cinemas and many others, where the rules of visiting establish the absence of unauthorized sound signals. "SpetsTechConsulting" offers everyone interested in suppressing cellular signals to purchase mobile phone jammers in various modifications. The cost of the equipment we offer to suppress the signal of cellular operators varies depending on their technical level and opportunities.

Cell phone jammers operate on different frequencies. They can create noise that interferes with the ability to work mobile means communications. Depending on the power of the noise generator, the range of the equipment to block the signal of cellular operators changes. How more powerful generator, the more space will be blocked. There are cell phone jammers for use in cars and for rooms of various sizes. Some modifications of the equipment offered by SpetsTechConsulting to suppress the signal of cellular operators can also effectively block data transmission via Wi-Fi.

In the online catalog "SpetsTechConsulting" you can find equipment for blocking GPS signal. For example, the GT-13C model, which belongs to the compact devices from the series portable jammers. This device, due to its external similarity to a mobile phone, small sizes And modern design, without attracting unnecessary attention, can provide freedom of movement to its owner by blocking the GPS signal.

Modern cell phone jammers have many modifications and provide various opportunities to their owners. If you are considering the possibility of purchasing a mobile phone jammer, but have not yet decided which one would be optimal to purchase, contact the specialists of SpetsTechConsulting, who are able to advise on a professional level and provide comprehensive assistance in choosing the optimal equipment for implementing a corporate and personal security system. Using modern capabilities provides many benefits to prevent information leakage of varying levels of significance.