Alert for TV antenna: how to choose and connect?

In order to improve the television receiver signal in rural areas and at the cottage, as well as in the city apartment, use a special amplifier for street or room antenna. This is an affordable compact device that can be done without effort with your own hands without referring to the services of professionals.

In our review we will dwell on the main technical features of amplifiers, as well as consider the criteria for choosing the optimal model for home use.

What it is?

In the modern world, television has long been the main means of obtaining and distributing information, and it causes engineers to think about improving broadcasting. The problem is that the highest quality video and the audiory can be achieved only if the signal source is in the area of ​​the direct visibility, when the receiver is located in the immediate vicinity of the repeater, and when the signal is deleted, it decreases. That is why in many houses the signal goes weakly – it causes a deterioration in image quality and creates extraneous noises. In addition, when working on cable connections, the data transfer rate has repeatedly decreases.

In order to improve the quality of reception and transfer, and a special device is needed – the signal amplifier.

Especially relevant to its use in residents of villages and villages, as well as in private houses of the city feature, when there is no single centralized outdoor antenna, located on the roof of a high-rise building.

Device and principle of operation

All TV signal amplifiers intended for use in cottages or in private homes have a fairly simple device. They are a pair of boards connected to each other using a special strengthened schema – it is used to reduce the amount and volume of noise, which can occur during operation.

The cable circuit is supplied with a special capacitor necessary to adjust the frequency range. At the same time, the input circuit plays the role of a high-frequency filter. It provides for several operating frequencies: in the first range, the parameters are approximated by 48.5 MHz, and in the second, 160 MHz correspond to.

The presence of resistors in the working circuit design provides the ability to set the desired mode.

Due to the change of resistance parameters, it is possible to make voltage to 5 V and the current strength corresponding to 5 A – it is these indicators that provide maximum strengthening of the television signal by 4.7 dB at a frequency corresponding to 400 MHz.

Most of the antenna amplifiers for television devices presented on sale requires connection to a power source of 12 V, even the automotive batteries correspond to these criteria. In order to achieve the most correct operation of the device, It is best to use a stabilizer consisting of electrolyte and a diode bridge.

Antenna amplifier can be connected to TV through a coaxial cable. However, in this case, additional use of the throttle will be required, and the amplifier connects directly to the television receiver through the capacitor.

Any amplifier works on a specific principle.

  • The signals coming from the antenna pass through the agreement transformer.
  • From there they are moving to the first resistor, connected with a common emitter. There is a signal strengthening in it, and the working circuit is stabilized in parallel.
  • After that, the linear signal goes to the second cascade where the frequency correction is performed.
  • At the output, the enhanced signal comes directly to the TV receiver.

Review of species

There is a generally accepted classification of all the models of digital signal amplifiers presented for sale for television equipment.

Depending on the structural features, they are divided into several types of frequency range, as well as the installation site.

In the frequency range

For this parameter, all models presented in electronics stores can be divided into 3 groups.

Depending on the category, they perform various tasks, so each type of amplifiers can be used to obtain a particular desired result.

Consider every kind of more detail.

  • Broadband. Such models are commonly used as an element in home indoor antennas for a TV amplifier. Their functionality is reduced to improving the quality of the broadcast simultaneously on several receivers.

  • Multiapanone. These designs are used for host devices located on overestimated masts. Usually such amplifiers are installed in private homes.

  • Range. Amplifiers of this type are required in the case when it is necessary to achieve high-quality reception of the signal from the source located on a high distance from the receiver itself. Such a design adjusts the signal, suppresses noises that appear as cable changes. Most often used to improve digital broadcasting.

At the installation site

According to this criterion, all manufactured models are divided into 2 types depending on the installation of the device and the technical features of the installation. All signal amplifiers for 20 and more channels can be divided into internal and removable.

  • Internal – are a compact size unit that can be installed directly near the television receiver. This option has one disadvantage: due to cable losses, with a deterioration in weather conditions, a decrease in the quality of the signal coming directly to the amplifier may be observed.

  • Remote and masts – Located on a long pole near the antenna. Due to long-range deductions, the maximum signal improvement is ensured. However, the design has the main drawback, such as a short time, since any lightning or a strong wind can output a device.

    Conditionally amplifiers are also divided into passive and active.

    • In active models, the fee is attached directly to the antenna housing – Thus, the television receiver can take a large number of channels. However, this device is subjected to a gradual oxidation of structural elements, which leads to their conclusion under the action of adverse environmental factors.
    • Passive models Supplement additional use of an external amplifier purchased separately. This option is more profitable and durable, but it requires additional costs of installing the equipment and setting it.

    Best models

    In the modern market there is a large number of antennas having signal amplifiers.

    Among them are devices for both analog broadcasting and digital.

    Let’s stop more on the description of some of them.

    Extra ASP-8

    The domestic model is a passive syphase antenna, providing 4 pairs of V-shaped vibrators. A distinctive feature of such antennas is the possibility of their upgrades to achieve optimal signal gain. The operating frequency range allows you to take 64 channels in the corridor from 40 to 800 MHz.

    Some users note that The quality of the assembly of such amplifiers is not the highest. Nevertheless, the manufacturer assures that, being installed on the mast, the antennas with such an amplifier can withstand the impulses of the wind to 30 m / s.

    “Meridian-12AF” from Locus

    Pretty budgetary device that has received many favorable user reviews. From the positive moments, the design is noted, as well as a high gain coefficient, due to which the TV receiver can receive a signal up to 70 km from its source.

    Thanks to the miniature, the model can be installed even on masts.

    The surface of the product is processed by a special anti-corrosion composition, which provides a working resource for 10 years.

    “Hummingbird” from Ramo

    Another antenna, which is the optimal value for money. Refers to active models, so needed to connect to the power grid. The power adapter contains a regulator – this allows you to set the necessary gain coefficient, the maximum indicator of which corresponds to 35 dB.

    All elements of the device are made of metal, making it withstands temperature fluctuations. The amplifier is able to take both digital and analog channels. However, the length of the network cable is not large enough, so it will be necessary to buy an extension.

    “Inter 2.0 “from Ramo

    Residents of the first floors of multi-storey houses are often forced to acquire a room antenna equipped with a signal amplifier, since the surrounding items can create some interference. The leader among such devices is just this model.

    This is a multifunctional apparatus that has an affordable cost. The antenna processes a one-time 3 radio signal, 10 analog and 20 digital. Due to the availability of convenient ergonomic control, you can perform the necessary signal level control to ensure maximum quality. Among the advantages are celebrated A sufficient length of cables that allows you to install the amplifier anywhere. Of the disadvantages, low quality plastic is released from which the case is made, and the periodic loss of the stability of the reception in case of unfavorable weather conditions.

    DVB-2T

    The amplifier has pretty good technical and operational characteristics. Users attracts price, and experts identify the functionality of the chip. Metal BLASED BODY protects it from unfavorable mechanical effects. However, users still provide reliable protection against atmospheric precipitation, since this design is placed as close as possible to the ethereal antenna.

    The gain rate varies within 20-23 dB, and the level of concomitant noise does not exceed the threshold of 3 dB.

    The only minus, which is noted by some consumers, is that Such an amplifier maintains frequencies from 470 to 900 MHz. This model is very in demand among summer residents and owners of country houses.

    REXANT 05-6202

    Another popular amplifier model, A distinctive feature of which lies in the separation of received signals for streams. However, in order to function in a similar mode, the designs are required to enhance all the frequencies. The advantage of the model is reduced to its versatility, since it supports a rather impressive frequency range from 5 to 2500 MHz. In addition, the amplifier can work with digital, cable and essential television.

    To the advantages of model, users include 3 outputs for connecting, making a signal at once to 3 sources immediately.

    For comparison: all other analogs have only two connectors under cables. However, as practice shows, for such an impressive set of advantages in combination with a democratic value of the design I had to pay for your reliability. As evidenced reviews, In the course of use, one of the splitter branches may simply refuse.

    How to choose?

    When the TV signal is selected for digital and analog broadcasting, it is necessary to pay attention to the frequency range and the possibility of its placement. The technical specifications of the structures play no less. We list the most important.

    • Noise coefficient. The principle works here – than it is higher, the worse the quality of the audience. Experts recommend buying models in which noise coefficient does not exceed 3 dB.
    • Electric current consumption. Optimal are those amplifiers that consume electricity in the range from 30 to 60 A.
    • Strength parameter. This coefficient directly affects the distance from the source of the signal to its end user. There is absolutely no sense to use the amplifier in case your home is in the area of ​​the direct visibility of the repeater – in all other cases, the design should be selected with this parameter expressed in the decibels.
    • Output signal size. Optimal is considered parameter 100 dB / MKV.
    • frequency range. It must completely coincide with the similar parameters of the TV receiver, otherwise the purchase of the amplifier will be useless.

    When buying, you should check the product labeling and make sure that the packaging contains basic information about the manufacturer, as well as the number and series of the product.

    How to connect?

    In order to correctly put an active amplifier to the television antenna, you need to perform a number of simple manipulations. In general, the connection scheme is pretty simple and looks like this:

    • Stripping a coaxial cable, after that it is necessary to loosen the screws on the terminal for the further clamp of the antenna cable;
    • Next, the wire is made in such a way that the poles are under brackets, and the bench under the terminal is to avoid short circuit;
    • Then you need to well tighten the holding ribbons, and put on the amplifier of his cover;
    • After that, the device is installed on the antenna, fixed using a pair of screw connections.

    Next, only tighten all nuts, connect the cable to the plug and amplifier, be sure to observe the polarity, then de-energize the television receiver, then connect the wire running to it from the antenna.

        Thus, it is safe to argue that the amplifier connection procedure cannot be called complicated, nevertheless it requires marginal accuracy and attentiveness.

        About how the antenna amplifier for TV reception looks like, look next.

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