How to choose the best antenna amplifier for your TV
In order for the TV antenna to catch the signal better, an amplifier is connected to it. Antenna amplifier helps if there is a very long distance to the TV center or you have a weak, not properly selected antenna. In other words, it improves the quality of the received signal, and the TV receives the signal much better. Especially often, devices that amplify the television signal are installed on the lower floors of high-rise buildings and in rural areas.
- 1Where to install
- 2How to choose
- 3Some types of amplifiers
Where to install
It is desirable to position the antenna amplifier directly on or near the antenna, while protecting the device from atmospheric precipitation. If you place it near the TV, the signal with noise will amplify, and you will not get a normal picture.
Power can be provided through the antenna cable. Today, coaxial cables are used to ensure the transmission of the signal with the lowest attenuation. If desired, the power supply can be connected separately and placed in the room. Some devices that improve the signal, are protected from adverse natural phenomena. They are not afraid of electromagnetic interference.
How to choose
Many people are interested in how to select an antenna amplifier for the TV, so that it ceases to snow, and the picture was clear. For the right choice, you need to know at least about a few parameters:
- distance to the nearest transmitting station;
- what frequency range do you need?
- type of antenna that you already have.
Depending on the distance to the TV center, you must select the device for the TV with the appropriate gain. The maximum distance can be about 150 km. If the distance to the transmitting station is less than 10 km, the antenna amplifier for the TV set is not installed, a sufficiently correctly selected antenna.
To chase a high gain is not necessary, since such devices can self-excite, produce strong noises.
This is the case when it is important to know the measure. For the same reason, many models of amplifiers with various characteristics are produced to the same antennas. There are special tables that facilitate the selection of the device, and an experienced master, knowing the conditions of admission, it will not be difficult to do this.
If you install a broadband amplifier on a universal antenna, it will capture the full range of available television broadcasts. In most cases, this is exactly what they do.
Some types of amplifiers
Amplifiers can be broadband, as already mentioned, range and multi-band, designed for close and long-distance reception, can amplify the signal from cable television, distribute it to several TVs.
On the external lattice antennas of the "Polish" type I install an antenna amplifier for the TV swa. They operate in the range of 49-790 MHz. When choosing such an instrument, pay attention to the noise figure - it should be as small as possible. At the same time, the gain should not be the maximum. It is selected in such a way that the signal arriving at the TV's input gives a qualitative picture. There are a lot of swa models, you can choose the one you need, asking more details about its characteristics..
Most of the devices are assembled on two transistors, and are switched on in a circuit with a common emitter. Some circuits include two or four additional transistors, but there is an opinion that an increase in cascade does not lead to a significant improvement in performance..
The television antenna Locus is widely known. If it fails for some reason (lightning strike, poor sealing, aging of the elements, etc.), then you can install the LSA antenna amplifier and thereby resume its service. The L-series models are used quite often and are installed on passive and active antennas.
Alkad amplifiers with two and four outputs are produced, so you can connect several TVs. In some models, you can adjust the gain, and in the range of both meter and decimeter waves.
Lithuanian company Terra produces multi-input amplifiers that can add signals from several antennas, there are also devices of this company with several outputs.
A power supply is usually included with the amplifier for the TV. Its power consumption is about 10 W, it is connected to the network. The unit can be built-in, of small dimensions, in which the voltage stabilization is carried out by means of pulse-width modulation. In addition, there are separate cumbersome blocks on transformers, but they are gradually replaced.
You will be interested: how to choose an antenna for a TV.