To achieve a confident broadcast of the entire variety of channels, it may be necessary to use an antenna amplifier
Television in the modern world is the most massive means of receiving and disseminating information. It is this fact that leads to the fact that increasing the height of transmission towers is not just an achievement of engineering and technical thought, but also a way to expand the range of stable broadcasting. It can be achieved only in conditions of direct visibility of the transmitter: when removed, a decrease in the signal is observed, and both analog and digital broadcasting deteriorate.
Stability of reception is provided only in the immediate vicinity of the repeater
In the first case, without the use of a television signal antenna amplifier, quality deterioration and the appearance of increased noise are observed. With a digital or cable type of connection, the data transfer rate is reduced.
It is possible to improve the quality of received TV programs using a special device - a TV signal antenna amplifier. It is worth noting that the use of such an accessory will only be necessary for residents of rural areas who do not have a centralized antenna located on the roof of the house.
The device and principle of operation of the signal amplifier of a television antenna
TV signal amplifiers for a summer residence or an apartment have a fairly simple device. These are two boards that are connected to each other through a special circuit used to reduce the amount of noise that can be generated during operation.
To adjust the frequency range, the oscillatory circuit is supplied with a capacitor, and the input plays the role of a high-frequency filter. It has a range of operating frequencies. In the first range, the generated frequency characteristics are close to 48.5 MHz, in the second they are equal to 160 MHz. The presence of resistors in the circuit diagram provides the ability to set the desired modes.
The board has a set of capacitors and resistors necessary to achieve the desired characteristics.
By changing the resistance, you can achieve a voltage setting of 5 V and a current of 5 A. This provides a maximum signal gain per delta of 4.7 dB at a frequency of 400 MHz.
Many of the presented antenna amplifiers for the TV, which you can buy in electronics stores, require a 12 V source for power. This makes it possible to connect them to a car battery. To achieve correct operation, you can use a stabilizer in the form of a diode bridge and an electrolyte.
It is allowed to connect an amplifier for a television antenna to give directly to the source via a coaxial cable, but in this case it will be necessary to use a choke. The television receiver is connected directly through a capacitor.
The operation of the satellite signal amplifier is carried out according to the following principle:
- the signal coming from the antenna passes through a matching transformer;
- then it goes to the first transistor, which is connected to a common emitter;
- in the latter, the signal is amplified with parallel stabilization of the operating point;
- then the linear signal is fed to the second stage of transistors, where frequency correction is carried out;
- The output sends the amplified signal to the TV.
To INFORMATION!
In order to avoid losses during amplification, one of the resistors is connected to a small capacitor of the same current, which helps to correct the frequency response of the device.
Mast mounting allows you to get open access to the signal from the repeater, as it makes it possible to minimize the effect of interference
There is a generally accepted division of all digital signal amplifiers for a TV, which you can buy at a regular electrical store. They are divided into types according to the frequency range and installation location.
By frequency range
According to this criterion, all presented models can be divided into three types. Depending on the chosen category, different goals are pursued, since each type is used to achieve a certain result. Devices can be:
- broadband. Devices that are most often used as part of indoor home antennas for a TV with an amplifier. Their task is to improve the quality of broadcasting on a large number of receivers at once;
To INFORMATION!
This type of device demonstrates stable operation in both the decimeter and meter ranges.
- multi-range. Devices, the use of which is advisable for receiving devices located on long masts. Most often, the use of this type is observed in private homes;
- band. Amplifiers that are needed to ensure high-quality reception from a source located at a considerable distance from the receiver. In addition to the signal correction function, these devices have the ability to reduce noise that appears when the cable length is increased. Most often used to improve DVB-T digital television broadcasting
By place of installation
According to this parameter, all presented models are divided into two types - depending on the features of installation and installation of the device. So, all antenna amplifiers for a TV with 20 channels or more can be:
- internal, which are a small board that can be installed directly next to the receiver. In this embodiment, there may be degradation of the signal to the amplifier itself due to cable losses;
- portable or mast located on a long pole at the location of the antenna. Due to the far extension, they provide a qualitative improvement in the signal. But the main disadvantage can be considered fragility, since a strong wind or lightning strike will eventually damage the device or completely disable it.
Connecting the amplifier requires a power source of 5 or 12 volts.
There is also a division into active and passive amplifiers. In the first case, the amplifier board is mounted directly on the antenna housing. This allows you to receive more channels. But there are drawbacks: frequent failure of the board under the influence of external factors and the gradual oxidation of structural elements.
The second type involves the use of an external amplifier, which is purchased separately. This is a more profitable option, but requires additional configuration and installation of the device.
How to choose an amplifier for a TV antenna
When deciding to purchase an antenna amplifier for digital television or analog broadcasting, you should choose not only by range or location, but also take into account a number of technical characteristics:
- noise figure. Here the principle applies - the lower, the higher the quality of the picture. It is recommended to purchase devices with a declared level below 3 dB;
- current consumption. Amplifiers designed for consumption from 30 to 60 A are considered optimal devices;
- gain. This indicator demonstrates the relationship between the distance from the signal source to its consumer. It is recommended to choose the optimal coefficient. This means that there is no point in using the amplifier when there is a direct line of sight to the repeater. Otherwise, the device should be selected taking into account the coefficient, which is expressed in decibels;
- the output value of the signal. The most acceptable indicator is 100 dB / μV;
- frequency range, which must match the similar characteristics of a television receiver, otherwise the purchase of an amplifier will be useless;
- antenna type and amplifier model.
IMPORTANT!
It will not be possible to install a broadband amplifier on a range signal receiver.
Rating of the best antennas with an amplifier for home and garden
There are a large number of antennas on the market with built-in signal amplifiers. Among the available samples - both devices for receiving analog broadcasts, and for "figures".
"Extra" ASP-8
Russian model, which is an in-phase passive antenna equipped with 4 pairs of V-shaped vibrators. One of the main distinguishing features is the ability to upgrade to achieve maximum signal amplification. The operating frequencies of the device allow you to receive up to 64 channels in the frequency range from 40 to 800 MHz.
Among the shortcomings, users note not the best build quality. But the manufacturer guarantees that when installed on a mast, it will be able to withstand wind gusts up to 30 m / s. The cost of the model is 750 rubles.
Antenna array ASP 8
"Meridian-12AF" from Locus
The device, despite the low cost (1300 rubles), has received many positive reviews. It . Of the positive aspects, buyers note the thoughtfulness of the design, which has sufficient rigidity, a high gain that allows you to receive a confident signal at a distance of up to 70 km from the source. The compactness of the model allows it to be mounted on masts. The presence of anti-corrosion treatment guarantees a working resource for 10 years.
Meridian-12AF
"Hummingbird" from REMO
Another antenna that is distinguished by an acceptable cost with adequate signal amplification quality. Its cost is 1400 rubles. Since this instance is an active model, it requires an electrical connection. There is a regulator on the power adapter that allows you to set the gain with a maximum of 35 dB. The metal design of all elements of the device makes it immune to temperature extremes. Can receive both analog and digital channels. The length of the network cable is not very long, so you will need an extension cord.
Hummingbird from REMO
Best Antenna Amplifiers
You can buy a ready-made antenna, which is equipped with a signal amplification system, or you can purchase this item separately to try to install it yourself.
Locus LA-31
A single-stream type amplifier, which is designed to stabilize the signal and improve its quality. The gain of the device is maximum 22 dB, while the variation occurs randomly. Requires weather protection. The cost of the device is 335 rubles.
DVB-T2 amplifier
A Chinese-made product, despite the dubiousness of its origin, it has good performance characteristics. The gain is a maximum of 23 dB, and the noise level varies from 2 to 3 dB. One of the advantages can be considered a sealed steel case that protects against atmospheric precipitation. The only weak point is support for frequencies in the range from 470 to 900 MHz. The cost of the model is 360 rubles.
Alcad AI-200
The device of the Italian company, which is the most popular in the territory of the Russian Federation. This device provides high-quality signal amplification, allowing fine adjustment of the centimeter and decimeter range. The noise figure of this accessory is less than 4.5 dB. One of the distinguishing features is the function of dividing the signal into two streams, which makes it possible to broadcast to two receivers at once. The popularity of the device is due to the high parameters of quality and performance. The cost of the amplifier is 1400 rubles.
Indoor antennas with amplifier for TV
Residents of the first floors of multi-storey buildings may need to purchase an indoor antenna equipped with a signal amplifier, since surrounding objects create certain interference. Among these devices also have their own leaders.
"Inter 2.0" from REMO
The Russian-made device, which is a multifunctional device with a reasonable price. The antenna has the ability to process 20 digital, 10 analog and 3 radio signals at once. The presence of convenient control helps to implement the necessary signal level to achieve maximum quality.
Among the advantages, users note an acceptable cost, which is 890 rubles, an attractive design and ease of installation. Special mention deserves power cables and antennas, which have the same length, which allows installation in any place. The disadvantages are the periodic loss of reception stability and the poor quality of the plastic from which the case is made.
Remo amplifier
Harper ADVB-2120
A model with a wide range of characteristics. The antenna has a large frequency range: from 87 to 862 MHz, it can be used to amplify digital and analog broadcasting. The design of the device is original, which allows you to successfully fit it into any interior. The signal amplifier in this model is powered directly from the receiver or television receiver. Such a function imposes certain limitations, but is a positive quality in terms of compactness. The presence of a closed ring allows you to hang the antenna on any convenient object. The cost of the model is 570 rubles.
BAS-5310-USB Horizon from REMO
One of the best indoor antennas, which is also produced in the Russian Federation. Among the advantages, one should highlight not only the original look, but also a convenient mount that allows you to place the amplifier directly on the TV. The correct setting will allow you to receive up to 69 channels. It is also possible to connect to the receiver via a USB port. The antenna is powered by 5 volts, the power supply is included. The only downside is the short cable. The cost of the model is 850 rubles.
The main advantage of using an antenna amplifier is to improve the quality of television broadcasts. It is for this purpose that this category of technology is used. But these devices have their drawbacks:
- the use of a broadband amplifier can cause an overload of permissible signal levels, which will lead to its distortion;
- the presence of video stream distortions with their subsequent overlay will cause the opposite result instead of improving the effect;
- Difficulties in providing power to 12-volt devices.
IMPORTANT!
The power supplies used can generate low-frequency ripples, leading to a deterioration in the performance of the antenna, or produce high-frequency oscillations, which also do not improve the characteristics of the antenna receiver.
The purchase of a ready-made antenna with a built-in amplifier allows you to get rid of the self-assembly procedure
How to strengthen the signal of the TV antenna in the country
There are several ways that can lead to the desired result in improving broadcasting in a country house. You can try them before purchasing an amplifier.
- Changing the location of the antenna. You should try to direct it towards the repeater.
- Replacing an existing device with a more powerful one.
- Reducing the number of items that can shield.
- Checking the integrity of the cable.
- Increasing the number of antennas.
But the most effective can be the acquisition of an amplifier, the purpose of which is to improve the quality of the received signal.
How to connect an antenna with an amplifier to a TV
To connect a separate amplifier, you will need to carry out a series of manipulations. They are not so complicated, and for a clear understanding of the process, you can always find video instructions on the Internet. The connection diagram is as follows.
- Stripping coaxial cable. After that, you need to loosen the screws on the terminal for clamping the antenna cable.
- Next, you need to thread the wire in such a way that the braid gets under the bracket, and the wire lives under the terminal - without a short circuit.
- Tighten the retaining screws.
- Put the cover on the amplifier.
- Place the device on the antenna through a pair of screw connections. In this case, it is required to place the device with printed conductors outside.
- Tighten all nuts.
- Connect the cable to the plug and amplifier, observing the polarity.
- Turn off the TV and connect the wire coming from the antenna to the receiver.
- Connect your TV and amplifier to the network and start watching.
The procedure for connecting the amplifier to the antenna is not the most difficult, but requires care and accuracy.
The purchase of an amplifier is a necessary measure in the absence of stable broadcast reception. Once again, you can see how it is necessary to carry out installation, from the video presented. Do not be afraid to do it yourself, because the process is not particularly difficult.
To improve the TV signal in a city apartment, and even more so in a place remote from the repeater - in a village or in a country house, an antenna amplifier for a TV is used. Small in size and affordable, the device can be installed independently, if you correctly approach the choice of model.
Consider the technical features of the devices and analyze the criteria for choosing an amplifier for home use.
If the TV does not work from a cable or satellite dish, then it picks up a signal using a conventional antenna - indoor or outdoor. The transmission process takes place as follows: towers are installed at a certain distance from each other, relaying transmissions.
Household receivers - televisions - use an antenna to catch signals and convert them into video, accompanied by sound.
A good signal is created in line-of-sight conditions. If on its way there are obstacles in the form of, for example, reinforced concrete structures, then the quality of the image and sound drops sharply
To stabilize and improve the TV signal, an amplifier is used for a home television antenna. Its importance increases where a common powerful receiver is not installed on the roof, that is, outside the city. The device helps to achieve the maximum clear picture on the screen and purity of sound due to the fact that it reduces interference.
Some antennas cope with signal transmission on their own, without connecting additional devices. Therefore, before buying, study the technical characteristics of the antenna and make sure that its capabilities are limited, and it is not possible to set it up for high-quality image and sound without connecting a special device.
The principle of operation of the antenna adapter
Amplifiers for TVs are simple in design and can have a different design. Some consist of a pair of boards that implement circuitry to reduce noise. One of the circuits performs the function of a high-frequency filter, the second is equipped with a capacitor to adjust the frequencies.
Through adjustment, a maximum signal gain of 4.7 dB can be achieved at an operating frequency of 400 MHz.
Some types of amplifiers are designed to be powered from a 12 V source, that is, they can be connected to a car battery. To achieve stability, a stabilizer is used, the circuit of which includes an electrolyte and a diode bridge.
A number of devices are connected with a coaxial cable, but using a choke. They are connected to the TV through a capacitor.
Consider, using the example of one of the transformer amplifier circuits, how the device works. The module is powered by a signal cable.
The antenna is connected directly to the transformer winding. The amplifying element VT1 is matched with a common emitter. Feedback is provided by elements C1, R3, L1
C1- a capacitor connecting the feedback section to the power supply and operating at low frequencies. R3- a resistor that determines the stable operation of the amplifier in various frequency ranges. L1– inductance equalizing the frequency amplitude.
Feedback to the flow is organized by a loop C3, R4, which together with R1 and R2 enable cascade operation. C2- a capacitor that provides the connection of the transformer.
The signal from the antenna enters the matching transformer, then is transmitted through the transistor, amplified and stabilized in the emitter. Then there is a frequency correction at the second stage of cascade transistors, after which the signal enters the TV.
Thus, thanks to the television amplifier, the sensitivity limited by noise is increased, and the losses of the received signal in the coaxial cable are also compensated.
Types of television amplifiers
The division of devices into categories is most often carried out according to two parameters: the installation site and the frequency range. This applies both specifically to antenna amplifiers and to related analogues - television and satellite.
There are three types of frequency range:
- range;
- multi-range;
- broadband.
range the device amplifies the signal only in a certain, given frequency range - meter or decimeter. One of its functions is to reduce the noise that appears when the cable length is increased.
Multiband devices operate with the same efficiency in different frequency ranges, and can also receive signals from several sources.
Broadband the amplifier operates in the meter and decimeter ranges, is used for digital television.
An example of a broadband device is the GAL AMP-101 model. The connection is made through a coaxial cable and a separator. Gain - 20 dB
According to the place of installation, all devices are divided into external (mast) and internal. External ones are mounted at the installation site of the television antenna - on a pole or mast fixed on a balcony or roof. They have strong protection.
Internal amplifiers are located near the receiver. Their disadvantage is the losses associated with the length of the cable.
Purchase selection criteria
The choice of a signal amplifier for a TV antenna depends both on the technical criteria of the device itself and on external factors, such as the location and installation conditions. However, in the first place are always the characteristics that affect the quality of the signal - something for which additional devices are usually purchased.
Criterion #1 - operating frequency range
The frequency range connects three devices - the television receiver itself, the antenna and the amplifier itself. First select the antenna. Here it should be remembered that wide-range ones lose to narrow-range ones, that is, the signal will be weaker.
Antenna amplifier operating in the range of 470-862 MHz and having a gain of at least 30 dB. Can be installed outdoors if additional moisture protection is provided
If the reception area is not far from the repeater, then you can also purchase an "all-wave" covering a wider range. However, it would be better to catch a signal from a remote tower with a device designed for a limited frequency range - for example, MV or UHF.
An amplifier is also selected according to the frequency response of the antenna. If it does not match the range, then it will not work.
Criterion #2 - Noise Figure
The antenna amplifier must correct the signal-to-noise ratio upwards. However, each device receives its own noise during data transmission - and the stronger the signal, the more pronounced they are.
With a high noise figure, only intense noise interference, known as "snow", will be visible on TV screens. The image disappears completely, the sound also disappears
It is believed that the noise figure should not exceed 3 dB - this is the only way to guarantee a good signal transmission quality, but the latest generation devices also have lower values - less than 2 dB.
Criterion #3 - Gain
Do not assume that the higher the signal gain, the better the transmission quality will be. In fact, excessive gain leads to signal distortion, which causes the opposite effect - clipping or overloading.
The parameter is measured in dB and has average values:
- decimeter - 30-40 dB;
- meter - 10 dB.
Thus, decimeter can cover both 22 and 60 channels, and meter - no more than 12. If the amplifier increases the coefficient by 15-20 dB, this is considered a good result.
When choosing an amplifier by the coefficient, it is necessary to take into account the real conditions and the level of reception. Usually they are guided by the distance to the tower, that is, the repeater.
An amplifier is usually used if the distance from the repeater to the receiver is at least 9 km. If the tower is 150 km or further, it is useless to use even a powerful device - this is the maximum for which household models are designed
In order not to get into a mess, you can choose a device with the ability to adjust, additional adjustment. There are many universal models, while they are designed for different distances.
If the tower is in line of sight, no amplifier is needed.
Criterion #4 – Active or Passive
If we consider the principle of operation of the device, then it is necessary to take into account the division into active and passive. The passive one works offline, while the active one needs additional power from the network. Most often, the device is connected through an adapter - an adapter for 9 V or 12 V.
The closer the installation location of the active device to the TV, the better the signal will be. A long cable increases the risk of interference that cannot be eliminated by adjustment.
This broadband amplifier has a total gain of 10 to 15 dB over the 400 - 850 MHz frequency range. UHF can be used where the television signal is too weak to get by with just one, even a good, antenna. For reliable operation of the antenna amplifier, you need to cut the contacts as short as possible. Capacitors C1, C2, C6, C7 SMD type (for surface mounting). The antenna amplifier must be assembled inside a metal box, and then connected next to the TV antenna.
PCB diagram for a TV antenna amplifier using a 2sc3358 transistor.
Amplifier components:
T1 transistor 2sc3358
C1 - 10mF / 35v C2, C9 - 1nF C3, C4 - 10 nF C5, C6, C7, C8 - 10 pF
R1 - 470 Ohm R2 - 2.2 kOhm, R3 - 1 kOhm, R1 - 5 kOhm
L1, L2 - 2 turns 0.5 mm, 3 mm. L3, L4 - 10uH or 10 turns, 0.2 mm on ferrite.
12 volt power supply.
The amplifier is powered by a 12V power supply. A simple stabilized source is enough - a diode bridge and a 1000 microfarad electrolyte. The TV antenna amplifier can be connected directly to the power supply via the TV antenna coaxial cable, but do not forget about the 10 - 100uH choke on the power line. The TV will be connected to the amplifier through a small capacitor. The adjustment is very simple, just move the resistor P1 to the middle and then adjust it to get the best image quality on the screen.
There is a TV in every home. But it is not always possible to receive your favorite TV show with good image quality: either the TV center is far enough away, or its transmitter does not emit a very strong signal on the air, or the conditions do not allow you to orient the receiving TV antenna to the TV center. To improve TV signal reception, an antenna amplifier will help. Usually it is located on the roof near the receiving antenna, but not everyone has the opportunity to place a useful device on the roof or attic, so the amplifier is usually located in the room, not far from the TV. The article provides descriptions of two proven antenna amplifier circuits. Both devices amplify the entire transmitted television signal spectrum: meter and decimeter waves. As a rule, additional amplification is required for new UHF channels broadcasting at "moderate" power.
Broadband antenna amplifier is designed to amplify television signals, both in the meter and in the decimeter range. It does not need balancing and tuning. The amplifier has two identical amplification stages (10 dB) made on low-noise transistors T1 and T2 (S790T) with their connection according to the common emitter circuit and frequency response correction circuits in the received frequency band (R1, C3) and (R5, C5 ). Although the transistor is imported, it is very easy to find it for sale in radio markets and radio parts stores.
Amplifier Specifications
Gain: 20 dB.
Supply voltage: 9…12 V.
Input/output impedance: 75 ohms.
PCB dimensions: 55x55 mm.
Rice. 1. General view of the antenna amplifier 30…850 MHz
Table 1. List of radio components for assembling the amplifier:
Rice. 2. Electrical circuit diagram
To achieve a confident broadcast of the entire variety of channels, it may be necessary to use an antenna amplifier
Television in the modern world is the most massive means of receiving and disseminating information. It is this fact that leads to the fact that increasing the height of transmission towers is not just an achievement of engineering and technical thought, but also a way to expand the range of stable broadcasting. It can be achieved only in conditions of direct visibility of the transmitter: when removed, a decrease in the signal is observed, and both analog and digital broadcasting deteriorate.
Stability of reception is provided only in the immediate vicinity of the repeater
In the first case, without the use of a television signal antenna amplifier, quality deterioration and the appearance of increased noise are observed. With a digital or cable type of connection, the data transfer rate is reduced.
It is possible to improve the quality of received TV programs using a special device - a TV signal antenna amplifier. It is worth noting that the use of such an accessory will only be necessary for residents of rural areas who do not have a centralized antenna located on the roof of the house.
The device and principle of operation of the signal amplifier of a television antenna
TV signal amplifiers for a summer residence or an apartment have a fairly simple device. These are two boards that are connected to each other through a special circuit used to reduce the amount of noise that can be generated during operation.
To adjust the frequency range, the oscillatory circuit is supplied with a capacitor, and the input plays the role of a high-frequency filter. It has a range of operating frequencies. In the first range, the generated frequency characteristics are close to 48.5 MHz, in the second they are equal to 160 MHz. The presence of resistors in the circuit diagram provides the ability to set the desired modes.
The board has a set of capacitors and resistors necessary to achieve the desired characteristics.
By changing the resistance, you can achieve a voltage setting of 5 V and a current of 5 A. This provides a maximum signal gain per delta of 4.7 dB at a frequency of 400 MHz.
Many of the presented antenna amplifiers for the TV, which you can buy in electronics stores, require a 12 V source for power. This makes it possible to connect them to a car battery. To achieve correct operation, you can use a stabilizer in the form of a diode bridge and an electrolyte.
It is allowed to connect an amplifier for a television antenna to give directly to the source via a coaxial cable, but in this case it will be necessary to use a choke. The television receiver is connected directly through a capacitor.
The operation of the satellite signal amplifier is carried out according to the following principle:
- the signal coming from the antenna passes through a matching transformer;
- then it goes to the first transistor, which is connected to a common emitter;
- in the latter, the signal is amplified with parallel stabilization of the operating point;
- then the linear signal is fed to the second stage of transistors, where frequency correction is carried out;
- The output sends the amplified signal to the TV.
To INFORMATION!
In order to avoid losses during amplification, one of the resistors is connected to a small capacitor of the same current, which helps to correct the frequency response of the device.
Mast mounting allows you to get open access to the signal from the repeater, as it makes it possible to minimize the effect of interference
There is a generally accepted division of all digital signal amplifiers for a TV, which you can buy at a regular electrical store. They are divided into types according to the frequency range and installation location.
By frequency range
According to this criterion, all presented models can be divided into three types. Depending on the chosen category, different goals are pursued, since each type is used to achieve a certain result. Devices can be:
- broadband. Devices that are most often used as part of indoor home antennas for a TV with an amplifier. Their task is to improve the quality of broadcasting on a large number of receivers at once;
To INFORMATION!
This type of device demonstrates stable operation in both the decimeter and meter ranges.
- multi-range. Devices, the use of which is advisable for receiving devices located on long masts. Most often, the use of this type is observed in private homes;
- band. Amplifiers that are needed to ensure high-quality reception from a source located at a considerable distance from the receiver. In addition to the signal correction function, these devices have the ability to reduce noise that appears when the cable length is increased. Most often used to improve DVB-T digital television broadcasting
By place of installation
According to this parameter, all presented models are divided into two types - depending on the features of installation and installation of the device. So, all antenna amplifiers for a TV with 20 channels or more can be:
- internal, which are a small board that can be installed directly next to the receiver. In this embodiment, there may be degradation of the signal to the amplifier itself due to cable losses;
- portable or mast located on a long pole at the location of the antenna. Due to the far extension, they provide a qualitative improvement in the signal. But the main disadvantage can be considered fragility, since a strong wind or lightning strike will eventually damage the device or completely disable it.
Connecting the amplifier requires a power source of 5 or 12 volts.
There is also a division into active and passive amplifiers. In the first case, the amplifier board is mounted directly on the antenna housing. This allows you to receive more channels. But there are drawbacks: frequent failure of the board under the influence of external factors and the gradual oxidation of structural elements.
The second type involves the use of an external amplifier, which is purchased separately. This is a more profitable option, but requires additional configuration and installation of the device.
How to choose an amplifier for a TV antenna
When deciding to purchase an antenna amplifier for digital television or analog broadcasting, you should choose not only by range or location, but also take into account a number of technical characteristics:
- noise figure. Here the principle applies - the lower, the higher the quality of the picture. It is recommended to purchase devices with a declared level below 3 dB;
- current consumption. Amplifiers designed for consumption from 30 to 60 A are considered optimal devices;
- gain. This indicator demonstrates the relationship between the distance from the signal source to its consumer. It is recommended to choose the optimal coefficient. This means that there is no point in using the amplifier when there is a direct line of sight to the repeater. Otherwise, the device should be selected taking into account the coefficient, which is expressed in decibels;
- the output value of the signal. The most acceptable indicator is 100 dB / μV;
- frequency range, which must match the similar characteristics of a television receiver, otherwise the purchase of an amplifier will be useless;
- antenna type and amplifier model.
IMPORTANT!
It will not be possible to install a broadband amplifier on a range signal receiver.
Rating of the best antennas with an amplifier for home and garden
There are a large number of antennas on the market with built-in signal amplifiers. Among the available samples - both devices for receiving analog broadcasts, and for "figures".
"Extra" ASP-8
Russian model, which is an in-phase passive antenna equipped with 4 pairs of V-shaped vibrators. One of the main distinguishing features is the ability to upgrade to achieve maximum signal amplification. The operating frequencies of the device allow you to receive up to 64 channels in the frequency range from 40 to 800 MHz.
Among the shortcomings, users note not the best build quality. But the manufacturer guarantees that when installed on a mast, it will be able to withstand wind gusts up to 30 m / s. The cost of the model is 750 rubles.
Antenna array ASP 8
"Meridian-12AF" from Locus
The device, despite the low cost (1300 rubles), has received many positive reviews. It . Of the positive aspects, buyers note the thoughtfulness of the design, which has sufficient rigidity, a high gain that allows you to receive a confident signal at a distance of up to 70 km from the source. The compactness of the model allows it to be mounted on masts. The presence of anti-corrosion treatment guarantees a working resource for 10 years.
Meridian-12AF
"Hummingbird" from REMO
Another antenna that is distinguished by an acceptable cost with adequate signal amplification quality. Its cost is 1400 rubles. Since this instance is an active model, it requires an electrical connection. There is a regulator on the power adapter that allows you to set the gain with a maximum of 35 dB. The metal design of all elements of the device makes it immune to temperature extremes. Can receive both analog and digital channels. The length of the network cable is not very long, so you will need an extension cord.
Hummingbird from REMO
Best Antenna Amplifiers
You can buy a ready-made antenna, which is equipped with a signal amplification system, or you can purchase this item separately to try to install it yourself.
Locus LA-31
A single-stream type amplifier, which is designed to stabilize the signal and improve its quality. The gain of the device is maximum 22 dB, while the variation occurs randomly. Requires weather protection. The cost of the device is 335 rubles.
DVB-T2 amplifier
A Chinese-made product, despite the dubiousness of its origin, it has good performance characteristics. The gain is a maximum of 23 dB, and the noise level varies from 2 to 3 dB. One of the advantages can be considered a sealed steel case that protects against atmospheric precipitation. The only weak point is support for frequencies in the range from 470 to 900 MHz. The cost of the model is 360 rubles.
Alcad AI-200
The device of the Italian company, which is the most popular in the territory of the Russian Federation. This device provides high-quality signal amplification, allowing fine adjustment of the centimeter and decimeter range. The noise figure of this accessory is less than 4.5 dB. One of the distinguishing features is the function of dividing the signal into two streams, which makes it possible to broadcast to two receivers at once. The popularity of the device is due to the high parameters of quality and performance. The cost of the amplifier is 1400 rubles.
Indoor antennas with amplifier for TV
Residents of the first floors of multi-storey buildings may need to purchase an indoor antenna equipped with a signal amplifier, since surrounding objects create certain interference. Among these devices also have their own leaders.
"Inter 2.0" from REMO
The Russian-made device, which is a multifunctional device with a reasonable price. The antenna has the ability to process 20 digital, 10 analog and 3 radio signals at once. The presence of convenient control helps to implement the necessary signal level to achieve maximum quality.
Among the advantages, users note an acceptable cost, which is 890 rubles, an attractive design and ease of installation. Special mention deserves power cables and antennas, which have the same length, which allows installation in any place. The disadvantages are the periodic loss of reception stability and the poor quality of the plastic from which the case is made.
Remo amplifier
Harper ADVB-2120
A model with a wide range of characteristics. The antenna has a large frequency range: from 87 to 862 MHz, it can be used to amplify digital and analog broadcasting. The design of the device is original, which allows you to successfully fit it into any interior. The signal amplifier in this model is powered directly from the receiver or television receiver. Such a function imposes certain limitations, but is a positive quality in terms of compactness. The presence of a closed ring allows you to hang the antenna on any convenient object. The cost of the model is 570 rubles.
BAS-5310-USB Horizon from REMO
One of the best indoor antennas, which is also produced in the Russian Federation. Among the advantages, one should highlight not only the original look, but also a convenient mount that allows you to place the amplifier directly on the TV. The correct setting will allow you to receive up to 69 channels. It is also possible to connect to the receiver via a USB port. The antenna is powered by 5 volts, the power supply is included. The only downside is the short cable. The cost of the model is 850 rubles.
The main advantage of using an antenna amplifier is to improve the quality of television broadcasts. It is for this purpose that this category of technology is used. But these devices have their drawbacks:
- the use of a broadband amplifier can cause an overload of permissible signal levels, which will lead to its distortion;
- the presence of video stream distortions with their subsequent overlay will cause the opposite result instead of improving the effect;
- Difficulties in providing power to 12-volt devices.
IMPORTANT!
The power supplies used can generate low-frequency ripples, leading to a deterioration in the performance of the antenna, or produce high-frequency oscillations, which also do not improve the characteristics of the antenna receiver.
The purchase of a ready-made antenna with a built-in amplifier allows you to get rid of the self-assembly procedure
How to strengthen the signal of the TV antenna in the country
There are several ways that can lead to the desired result in improving broadcasting in a country house. You can try them before purchasing an amplifier.
- Changing the location of the antenna. You should try to direct it towards the repeater.
- Replacing an existing device with a more powerful one.
- Reducing the number of items that can shield.
- Checking the integrity of the cable.
- Increasing the number of antennas.
But the most effective can be the acquisition of an amplifier, the purpose of which is to improve the quality of the received signal.
How to connect an antenna with an amplifier to a TV
To connect a separate amplifier, you will need to carry out a series of manipulations. They are not so complicated, and for a clear understanding of the process, you can always find video instructions on the Internet. The connection diagram is as follows.
- Stripping coaxial cable. After that, you need to loosen the screws on the terminal for clamping the antenna cable.
- Next, you need to thread the wire in such a way that the braid gets under the bracket, and the wire lives under the terminal - without a short circuit.
- Tighten the retaining screws.
- Put the cover on the amplifier.
- Place the device on the antenna through a pair of screw connections. In this case, it is required to place the device with printed conductors outside.
- Tighten all nuts.
- Connect the cable to the plug and amplifier, observing the polarity.
- Turn off the TV and connect the wire coming from the antenna to the receiver.
- Connect your TV and amplifier to the network and start watching.
The procedure for connecting the amplifier to the antenna is not the most difficult, but requires care and accuracy.
The purchase of an amplifier is a necessary measure in the absence of stable broadcast reception. Once again, you can see how it is necessary to carry out installation, from the video presented. Do not be afraid to do it yourself, because the process is not particularly difficult.
