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Equipment for digital television is what you can buy in our store. Antenna repair technology LOCUS Antenna amplifier wba 417 v 11.02 schematic

And suddenly a message from my mother came to my telegram that all the channels on our TV were suddenly loaded. I went to see what was the matter. I come home, I look, and the power light on the antenna splitter is off. Here are the ones on ... Well, I think the power supply of the splitter is covered. Moreover, when pulling out and inserting the power plug of the splitter into the outlet, the lamp lights up slightly but immediately goes out.

I was already wondering where to buy a new splitter, when suddenly it comes to me el_pir who also helped build the barn that day. I described the situation to him, and he says:
—And pull out the incoming antenna wire from the splitter!
- Do you think the antenna is short? - I answer and disconnect the wire and, lo and behold, the power light comes on!
I measure the resistance of the antenna amplifier, and it is 43 ohms. el_pir rummaged in his smartphone, and said that the input resistance of the amplifier should be kilo-ohms (in fact, about 95 k Ohm). Well, he is an electronics engineer, he understands this. Then, before it got dark, I climbed onto the roof and disconnected the antenna. I measured the cable - the cable is in order. So it’s like an antenna.

I have a rather old Locus antenna of the cool Meridian series. But now "Meredian" is produced only aluminum, and then it was still a matter of choice for steel. The body of the amplifier is not flattened, as they do now, but round, like that of the simplest Zenith series. The amplifier is of the LSA-417-04 type. The last number denotes the modification number, expressed in the way the amplifier is attached to the antenna mustache.

I had a used, but more modern LSA-417-05 antenna amplifier in my magic shed, pulled out not so long ago from the antenna Irina Iakovleva when I changed it to a new one, when she had problems with the antenna. But then it turned out not to be in him, but in the power supply, so the removed amplifier was in good order. There was no time to re-solder it right now before dark and dinner, especially since it did not quite fit the fasteners, and the antenna also needed prophylaxis. Then el_pir temporarily gave me his antenna and even a digital TV unit to indulge in a week while he was in the city. I quickly hooked up his antenna and it worked. And even all digital channels! :-)

Having indulged in digital television, I appreciated its undoubted advantages (picture quality and a third more channels - 30 versus 19 analog) and cons (increased delay when switching channels compared to analog television and a complete loss of the channel for several tedious seconds with interference from a flying aircraft, and they fly often with us, because Vnukovo is two kilometers away)

The next day I carried out maintenance on my old antenna and changed the amplifier:

As I mentioned above, the old LSA-417-04 amplifier (which is on the left) had a different mount than the new LSA-417-05, but I removed the plastic clamping strips with nuts mounted in them from the contacts of the new amplifier and slightly bent the contacts so that they fell into the recesses of the antenna housing, as if specially designed for this:

Then he screwed in the bolts from the outside, pulling the mustache to the body, and pulled the amplifier contacts with nuts screwed onto the same bolts from the inside:

I put the antenna back in place and it worked!

Antenna amplifier is a device that is installed on an antenna in order to amplify the signal and, as a result, improve the picture quality on the TV screen. It will be especially relevant in an area far from TV towers. As a rule, these are villages and villages located far from civilization.

Installing an antenna amplifier is necessary to improve signal quality.

There can be many reasons for poor signal reception. Even residents of large cities face such a problem, although it would seem that they are located in the immediate vicinity of the towers. The most common causes of interference are:

the signal source is too far from the receiving point;
obstacles located in the signal path - trees, high-rise buildings, etc .;
landscape gap between the signal receiving point and the tower;
weak signal.

The choice of an antenna amplifier depends on many factors. However, the first step is to understand which antenna is installed. There are two types of them: passive and active. A signal amplifier is already built into the active antenna design by default. If you have problems with the signal, then most likely you are the owner of a passive antenna. Such an antenna should be installed only if the transmitting tower is within sight and there are no obstacles between it and the antenna.

The next thing to figure out is the distance to the nearest tower.

ADVICE. Depending on the distance to the tower, you should select a device with a suitable gain. As a rule, it is worth buying an antenna amplifier only if the distance from the tower to the house is more than 10 km. If the distance is less, then the problem is in the incorrectly selected antenna and the amplifier will not correct the position.

The gain is a characteristic to be careful with. This is the case when more is not better. With a lack, the signal will not be strong enough, and with an excess, noise will appear, which will still interfere with high-quality broadcasting. For this reason, many models of amplifiers with different characteristics are produced for one type of antenna.

For the correct choice of the coefficient, you must use a special table. This is not difficult.

Amplifier types

We will not go into the intricacies of the antenna amplifier design - for the layman, this information will be useless. Let's talk about two types of amplifiers and their purpose.

Amplifier SWA

Antenna amplifiers SWA are used in the ASP-4 and ASP-8 grid-type antennas, which are often called "Polish" antennas. By themselves, these antennas have a very low gain, and they cannot do without an amplifier.

The two most important considerations when choosing a SWA amplifier will be gain and noise figure. When buying, pay attention to them. We have already talked about the first one above. With the second, it's even easier - the less the better.

Amplifier LSA

This type of amplifier has a very narrow range of applications. They are produced for the repair of failed Locus antennas. Certain LSA models can amplify their matching Locus antenna models.

Power Supply

As a rule, the design of the antenna amplifier is equipped with a built-in power supply. The device is connected to the network and, due to its low power, consumes only about 10 watts. There are built-in and external power supplies. Integrated power supplies are small, low-power devices. With the unstable operation of the electrical network, they are of little use. However, if power surges are rare, it will be enough.

External power supplies are large in size and power consumption. They provide stable operation of the antenna amplifier even in unstable network conditions. Such power supplies are designed for different input voltages: 5, 12, 18, 24 V. This parameter must exactly match the supply voltage of your particular amplifier.

Installing the antenna booster

Externally, the amplifier is a small electronic circuit. It is attached directly to the antenna itself with bolts and nuts. The amplifier will show great efficiency if it is installed near the antenna on the mast, between the matching device and the feeder. The signal passing from the antenna along the feeder significantly reduces its level. After installation, you need to check if the signal has improved. Without equipment, this can be done by simply turning on the TV.

If the antenna is already installed, it will not be difficult to connect the amplifier and, using a special adapter, power the power supply. However, if the antenna is not connected, then you have to be puzzled by running the cable to the TV. If you are not confident in yourself, then the best solution would be to call a TV technician who will quickly and efficiently complete this task.

Connecting a TV cable to a TV

The first step is to choose a TV cable. This is a very crucial moment, since even an expensive TV will not provide you with a high-quality picture without a properly selected wire.

The most widespread on the market are coaxial cables from various manufacturers with a characteristic impedance of 75 Ohm brands RG 6U, SAT 50, SAT 703B and DG 113. The brands are listed in ascending order of quality. The marking is applied to the cable sheath along its entire length.

IMPORTANT. We will not describe all existing antenna cables, as this is not possible. However, please pay your attention to the following - the cable must have a characteristic impedance of 75 Ohm and the outer diameter of the sheath must be at least 6 mm. By adhering to these two criteria, you will be able to find the right cable.

After you have chosen the cable, it must be connected to the plug, since bare wires cannot be connected to the TV. In our time, F-plugs are the most widely used. The plugs are available in three different sizes for different cable diameters. Be careful when buying - make sure the plug fits your cable. After the purchase, it remains to install the plug. This can be done according to the scheme below.

Antenna grounding

However, this is not all. The antenna must be grounded before use. This is a very important and responsible procedure, and it is worth approaching it responsibly.

IMPORTANT. Be careful! In the previous steps, the maximum that you could ruin was the cable. When grounding, there is every chance of getting an electric shock - which can be fatal. Therefore, in no case try to do the grounding yourself! Call a master who will do everything quickly and efficiently.

If you live in an apartment building, as a rule, the antenna will be installed on a balcony or loggia. In such cases, there is no need for grounding, since it is already provided for when building a house. Grounding in a private house or in a summer cottage will be relevant.

That's all. In this article, we talked about the existing types of antenna amplifiers and how best to install them. We hope the article was informative and helped you in this difficult question.

Equipment for digital television is what you can buy in our store. Our company has been operating in the market of terrestrial and satellite equipment since 2003 and we already know most of our clients by sight.
For regular customers of our online store, there is a system of discounts, which is calculated automatically according to the coupon number assigned to you personally.
All equipment undergoes pre-sale preparation, namely, the latest software version is installed on satellite and terrestrial set-top boxes. All receivers are tested for functionality.
Our company delivers equipment both in Moscow and throughout Russia. Most courier delivery companies have agreements on preferential shipping rates.
In our online store you can find almost any equipment that you may need to receive satellite and terrestrial television. We have tried to make the ordering process convenient for anyone If you plan to order more than one item, but several, then you can use the store search and pay attention to the related equipment. If you are looking for equipment for receiving satellite TV, then you should go to the tab menu "Satellite TV", if for receiving terrestrial or cable TV, then "Terrestrial TV", etc. If you have any questions during the ordering process, then you can use the online chat, which is located on each page of the online store, or order a call back.
We hope that in the online digital TV store you can spend the minimum amount of time ordering the required equipment.

Well, now it's time to write another, rather large article on terrestrial television, in which I will try to cover the main points of choice of antennas(as well as amplifiers, dividers, cables, etc.), frequent problems and questions, we will definitely talk about Digital DVB-T2 TV, well, and probably draw conclusions from all the material covered.

The purpose of this article is to explain to people who have not particularly dealt with these systems, "how it works and what it is eaten with." Also, some knowledgeable people can learn something new for themselves, or just find interesting material. All information is mainly taken from personal experience, which was obtained by our company over many years of work, and now we want to bring all this information to you. Let's go.

1. This is terrestrial television.

Terrestrial television- this is, to put it in an accessible language - a public broadcast of a certain signal, in this case - a television signal, which is distributed "conditionally" free of charge, and anyone can receive it. The broadcast is made by the main transmitting station "tower" at a certain distance, and what depends on the power of this very tower. If the power is not enough, then at the points of signal drop at long distances, a special TV signal repeaters... Their main task is amplify the incoming signal so much that it would cover another certain radius from itself, it can be 15 km, or 30 km, or even 60 km, depends on the targets and the nearest settlements, or rather, their number.

If on the example of our city - Nizhny Novgorod, then the signal from our city tower can cover the coverage of about 70 km, but this is according to rough estimates, and then repeaters come into force, which send the signal somewhere else 50 km, which is also according to rough estimates. And even then, you should not be too deluded by these numbers, they are only conditional, and the real coverage and the presence of a signal at any distance can differ significantly from calculations.

The signal itself from this tower is conditionally divided into two ranges - meter and decimeter... And each of these ranges has its own number of channels. In most cases, the UHF signal is always worse.

2. What you need to receive a signal in the city.

I think that every person, in principle, knows this, it is necessary to receive - antenna, it is desirable all-wave, which will constructively contain reflectors for both ranges.

This, standard antenna, she is called " Delta 311", there are also many of its analogues, the most popular" Alpha 311"and they are identical, only produced by different companies. This is the most standard antenna for receiving a signal within the city, which can be found on the walls and roofs of almost every home. It is assembled almost entirely from ordinary iron, and additional plastic elements. Such an antenna can be susceptible to corrosion, although the average service life with careful use is about 10 years. There are modifications assembled from duralumin alloy, but they are extremely rare, but they do not rust.

Red arrow- shows reflectors responsible for receiving meter channels.

Blue arrow- shows reflectors for receiving channels in the decimeter range. Reflectors run along the entire main body of the antenna.

Green arrow- shows a special compartment, which contains a board for matching both ranges (MV and UHF), and the already coordinated signal is transmitted to the television cable connected to this board.

** the antenna itself has its own gain (about 5 dB), which is more than enough. An amplifier in a city in 99% of cases will only worsen the situation.

Here is such antennas basically enough for signal reception within the city, and even in its nearest suburban area.

For countryside are used antennas with active amplifiers, but about them in the next paragraph.

3. What you need to receive a signal outside the city.

If with the "city" everything is in principle simple, and even there is a certain antenna model, which will almost always be combined with the current urban signal level, then with the countryside - everything is many times more complicated. Here, most likely, you will have to act by the "Scientific poke" method, as they say, especially if your house is not located in a very populated place, which means that there is no one to ask about the signal level. In most cases, all country-type antennas go with active amplifiers, which are powered from the converter (220V network / 12V output).

In our arsenal there are several antennas that are more popular with buyers. I will give you an example of these antennas below, but before I do this, I want you to understand one very simple thing, namely, regarding the concept of distance. Those. I will indicate the APPROXIMATE distance for which the antenna gain (hereinafter - "KU") is calculated. This is nothing more than a relative concept, but in ANY way it is not part of the declared characteristics of the antenna, and you should not "rely" on it especially.

Now the antennas themselves. TOP 5 popular antennas.

5th place. Alpha 311 with amplifier.

Service life: about 10 years.

Type: all-wave

Total KU: + -18dB

The simplest modification city antenna, which has a built-in signal amplification board, and the gain is about 13 dB. This model is popular among people who live in an area of 30 km from the city, if we again take our example as an example. Nizhny Novgorod, then we have such places, these are: Kstovsky district, Borsky district, Balakhninsky district and some others.

This antenna got to the fifth place for one simple reason - the probability of replacing the amplifier is very small. Sometimes there come across such models of boards that are quite problematic to find. And the antenna does not shine very well with the build quality.

4th place. Strong 21/1 with an amplifier.

Assembly material: duralumin + plastic elements.

Service life: about 15 years.

Type: all-wave

Total KU: + -26dB

The fourth place goes to our duralumin antenna Strong 21 1, which has a good gain, and an approximate calculation of the distance showed about - 50 km. The antenna, just like the previous copy, works with an internal amplification board and needs a 12V power supply. In addition to standard reflectors of decimeter and meter ranges, the antenna is also equipped with "reflectors", which, according to the manufacturer, reflects the unnecessary part of the signal that causes interference. Frankly, there is no sense in this nonsense at all, since even having trivial knowledge in this area, we can say that it is very difficult to filter an analog signal, and certainly not in this way. Antenna material resistant to external influences, and corrosion. The antenna has a higher intrinsic gain due to the larger number of elements. Have Strong 21/1 In addition to the amplifier, there is also a matching board, which is located in the second compartment.

Why did this antenna get 4th place? And all because it is Chinese. Although it is represented by a Russian company, these antennas are being assembled in China. The build quality leaves much to be desired ... Sometimes the elements do not fit in the holes, there are backlashes on the boxes, etc. In general, the build quality is far from being up to par.

Attention! The supplied instructions for this antenna contain an error. The antenna uses amplifiers "Locus" - LSA-417 (LS-421), and not "SWA", as it is written in the instructions.

3rd place. ASP-8 with amplifier.

Assembly material: duralumin + iron + plastic elements.

Service life: about 15 years.

Type: all-wave

Amplifier type: internal board

Overall Gain: Depends on the amp model.

The antenna gets a well-deserved 3rd place, and it's not just that. This antenna is known to many, only under the names " Mesh, Grid, Dryer"etc. It has been produced for many years, initially the country of origin was Poland, which is why it is sometimes called the" Polish antenna ", although Poland has not produced them for a long time, but our" beloved "China makes these antennas It got its place because of its versatility, it can be used at absolutely different distances, depending on the installed amplifier. It uses "SWA" series amplifier boards, which are very easy to find, and it is not a problem to change them. boards with different KU, and change them, depending on the needs.

Amplifiers, series " SWA"have a very large spread in CU, it can be 10 dB, and maybe 60 dB. Accordingly, different configurations can be used at different distances. But this antenna has disadvantages, one of which is the impossibility of using the antenna without an amplifier at all. matching in this antenna DOES NOT WORK!

2nd place. Locus 35.09 with amplifier.

Service life: about 15 years.

Type: all-wave

Amplifier type: internal board

Total gain: 38dB

This antenna boasts of its excellent build quality and gain, which is estimated to be sufficient for a range of 70 km. The antenna uses a gain board LSA-417, which can be bought in almost any specialty store, including ours. The antenna is so clearly designed that, with proper installation, it does not let moisture into the sections with the matching and amplification board, which completely eliminates the possibility of short circuiting the elements.

I did not find any disadvantages of this antenna, all its elements are securely fixed, there is no backlash, the "mustache" is also quite tightly screwed to the body.

1st place. Locus 21.09 with amplifier LA-30.

Assembly material: iron + plastic elements.

Service life: about 15 years.

Type: all-wave

Amplifier type: external unit

Total gain: 38dB

The beauty of this antenna is that it uses loop-through amplifier outdoor type " LA-30", which is inserted not into the antenna itself, but into a cable break anywhere, but preferably closer to the antenna. Such an installation of the amplifier will allow you not only to get a high CU, but also to significantly facilitate replacement in case of failure. to change, for example, the amplifier in the Locus 35.09 antenna, you need to get to the antenna (and for many this is already an impossible task), remove it, remove the amplifier, or, to be more precise, unsolder the amplifier, then buy a new one and do the same operation, It's not very convenient ... And changing LA-30 is so simple that even a schoolboy can cope with it. You just need to unplug the amplifier from the outlet, unscrew the amplifier from the cable and screw the same, turn on the power. and that's it. The light bulb is harder to change.

3. Strengthening the signal.

For signal amplification a huge mass of all sorts of different amplifiers, some are universal and suitable for most antennas, some are individual, while they can only fit one antenna model, or something like that. There are amplifiers in the form amplification boards, available in the form of modules built into the cable, some can even be built into power unit, which is necessary for any amplifier, there are those that amplify only a certain frequency range, there are special "wired" amplifiers that do not allow the signal to fade on a large number of TVs, but incoming signal should be good initially... In general, there are a lot of options.

Consider the most popular amplifiers of several types.

1. Amplifiers, series "SWA" (777, 555, 7, 3, 49,5000,3000,6000, etc.)

This type of board can be referred to as " universal amplifiers"because they are suitable for many types of outdoor antennas, and buy such amplifiers can be found in almost all stores. The amplifier requires a special power unit, which is also possible buy in any specialty store. Power supplies are the same for everyone antenna amplifiers... There are a huge number of "SWA" models, some of which I have not even met. The most basic difference between all amplifiers is the signal amplification factor, and for the "SWA" series it can be 8dB, and maybe 60db.

Basically, not knowing the exact technical parameters of the amplifier, K.U. can be roughly calculated by the number of transistors on the board (a small four-pin, and sometimes three-pin element, black), the more there are, the higher the gain. By average standards, 1 transistor is equal to 10 dB of amplification, respectively, the number of transistors is multiplied by 10 and we get APPROXIMATE K.U. Exactly "Approximate" ...

2. Amplifiers, series "LSA, LS" (417, 421)

This type of amplification board is used in antennas " Locus" and " Strong"and they differ from each other only in the way they are mounted in the antenna box. Although they are considered interchangeable, however, with simple changes in the design, any board can be put into any antenna. The average efficiency of such boards is about 30 dB. any amplifier, this one also needs a power supply.There is one point, in "Locus" such boards are used according to the basic configuration, in contrast to "Strong" a ", in which, according to the instructions, boards of the" SWA "series are generally installed, although this not this way. When the "SWA" board is installed, the entire circuit is short-circuited at once, and protection is triggered on the power supply unit. Moreover, these are the words of the official representative of the company that produces these antennas. The instruction in "Strong" ah "WRONG! Be careful.

3. Amplifiers, series "LA" (11, 21, 31, 22U).

This is really universal amplifiers embedded in the "break" of the cable. Not only can they be used absolutely with ANY outdoor antenna, which has a matching board and no basic amplifier, so they are also more durable than the boards. Even if it is broken, a first grader can also change it. The numbers in the amplifier marking practically correspond to the number of decibels of the gain. The most important thing in such an amplifier is care during installation. You need to install it, according to the arrows on the case (Antenna passage to the power supply unit), if you mix it up, you can most likely run to the store for a new one. Like all amplifiers, it needs a power supply.

4. Amplifiers "plug-in" type (Alcad AL-200)

Amplifier has a built-in power supply and serves for routing a signal to a large number of TVs... It can be attributed already to the more professional part, since it has adjustment of each range (UHF / MV) and requires some knowledge in this area. Its essence is simple - not to let a good signal fade out on a large number of TVs. Note the word "Good", as this type of amplifier has practically no initial gain. To use it, the signal must already be good, and the amplifier will make sure that the signal does not lose its quality at a large number of points.

The amplifier itself has one input and two independent outputs, on which one or several signal dividers can be hung. The gain is so high that personally in our practice it was possible to connect about 50 TVs at the tourist base.

If the initial signal is weak, then you can combine 2 amplifiers - Alcad al-200 and amplifiers, series "LA", which I wrote about above. Those. you first amplify the input signal with an amplifier, series "LA", and then you start up the amplified signal on the alcade. Just don't overdo it.

A small postscript to this topic about amplifiers, and indeed about amplifying the broadcast signal in general.

Although I wrote this before, I will not be too lazy to write it again. With regards to signal amplification, remember a few simple rules:

1. Amplifiers do not filter noise, but amplify the entire spectrum of frequencies ... and noise as well.

2. In 99% of cases, the amplifier will not help to bypass noise, reflections, etc. If your house is blocking the signal, look for a way around it.

3. The signal needs to be amplified in moderation. Overemphasizing the signal will have the opposite effect.

4. Amplifiers have no concept of "kilometers". Don't take this "parameter" seriously.

5. There are no passive amplifiers in antennas. And in general they do not exist in principle. A passive amplifier is an amplifier that operates without power.

6. In urban areas, amplifiers are not needed.

7. Any amplifier does not work in passive mode. Those. they cannot be used as matching boards, for example.

8. In some models of antennas, the amplifier cannot be installed at all.

9. The power supply on the plug (which is inserted into the TV) has no voltage.

4. Terrestrial digital TV DVB-T2.

A sore subject for the entire population of Russia, well, more precisely, a sore one for those who are interested in this ... but do not really understand this, and believe me, there are a lot of such people. I've already written quite a lot of information on this topic in principle, and she is on the site... but one thing, I'll repeat.

Let's start with the most frequent question, well, maybe not the most frequent, but very common

"What kind of antenna is needed to receive a digital DVB-T2 signal in the city and beyond?"

And the answer is very simple - the same as for an analog signal. They are no different, and our smart-ass, I apologize for my French ... marketers ... make money on naive people by selling them a "type" antenna for digital TV, although this is an ordinary antenna, decimeter range. Remember once and for all, ANALOG AND DIGITAL ANTENNAS DO NOT EXIST. This is an antenna, and it cannot have such concepts at all. This is the same as the nails for screwing into the board in red, and the "other" nails for the boards in blue.

"Receiving HD channels on digital DVB-T2 television"- this does not happen, does not exist, and technically it is impossible. Forget about this nonsense altogether.

In general, there are a lot of misconceptions about questions, and as I said earlier, the answers to them are on our website.

I noticed a very interesting thing here, regarding this topic about terrestrial DVB-T2 television, or rather it was a discussion on some of the forums devoted to a similar topic, and that's what I read there.
The discussion itself began due to the fact that someone wrote something like this

"Digital television will reach new levels in a few years, and will broadcast many channels for free, including in HD format. Such a turnaround will lead to the bankruptcy of all satellite providers and total financial losses of some organizations that provide digital TV connection services."

This is how it sounded. And so I also decided to reflect on this topic, in fact, I did not ponder for a long time ... It was quite easy to guess the logic of the person who wrote this, since it can only be called nonsense written by a very naive user.

We all know that progress does not stand still, and this also applies to television. The gradual transition from analogue to digital TV has caused a lot of strange emotions in people. Someone thinks that the full transfer to digital TV will take place in a few years, and we will receive all the same channels, only in the best quality, some people think that progress has dramatically moved, and now everything can be watched for free, and even HD. and someone in general "To the light bulb" for all this figure ... and I'm just one of the last.

And now on the merits. The full transition from analogue to digital TV will indeed take place in a few years, and analogue broadcasting will be removed altogether. The fact that there will be the same channels that we can watch now on analog TV is true, or rather, there will be even a little more of them, about 25 ... I think. After the complete transfer, the introduction of additional PAID multiplexes will begin, the price of which will not be known soon. And about the fact that we will watch everything in HD, do not pay anything, etc. - forget these tales, dear. Firstly, no one will let you do this, as it was written earlier - this will cause bankruptcy of many large companies, well, or just huge losses. The same "NTV Plus" and "Tricolor TV" belong to the same holding - the Gazprom Company. Do you think Gazprom will allow such services to be "Free View"? Of course not...

Not quite the topic will be said, but when some person, like 10 years ago, invented a device that separates ordinary water into 2 components - oxygen and hydrogen. Those. in simple terms, he got fuel from water. If he sold this device, or his scheme, let's say ... to a large automaker that would start producing cars that run on water, then all the oil companies would simply go broke and there would simply be a global revolution of the entire system. A real chaos would begin. Since then, nothing is known about the person who succeeded. Either they just paid very well so that the invention would not go to the masses, or - "removed" ... we will think about the best option.

5. Consumables. Elements of the layout.

In addition to information about the antennas themselves, it will also be useful to know about consumables, and about the wiring elements.

1. Cable.

For terrestrial television, and not only for it, the usual coaxial cable, marking RG-6 75 ohm, well, you can and 50 ohm of course, as you like. It is better to take the cable always more dense, which will be more difficult to bend with your hands, which means that the cable will be more resistant to external influences, due to which a longer service life is guaranteed, this is especially important when laying outside. Do not buy cheap Chinese cable, the average retail price of which is 5-7 rubles. per meter, it will crack at the first frost, as a result of which moisture gets inside the cable and is likely to seep into the TV tuner, which will disable it (maybe not immediately, but over time). And in general, such cables are torn almost by hand, not to mention the effect of strong winds, frost, blows, etc.

2. Connector for commutation.

In general, everything is simple with them. Nowadays for commutation of RG-6 cable with dividers, adders, adjustable amplifiers, plugs, loop-through amplifiers, cable connectors, etc. used here is such a thing called " F-connector".

The connector is practically universal, although there is also an option for a thin RG-6 cable, but they are rare.

3. Divisors. Adders.

For branching the broadcast signal into several points special dividers, which have a bandwidth of 5-1000 MHz, and also have a certain loss in the signal, which are also measured in "dB". Dividers usually indicate these parameters, the more points of the signal output, the greater the attenuation will be. It can be from 2 to 8 dB, and in Chinese cheap dividers it can be all 15 dB. You can distinguish them by sight, if you have a little experience in these matters, or with the help of a tester, but this method does not always work. We just need to "ring" the divider from the input to the output with the tester, if it "rings", then most likely - China. Normal dividers (for example, RTM) do not ring, they have a capacitor, unlike the Chinese ones, there is a resistor. And the price of Chinese dividers is usually 50 rubles.

All dividers have a screw connector for an F-connector, which I wrote about above.

The adder is a completely "reverse" device, although it looks the same. Only its purpose is not to separate the signal, but on the contrary - to mix. Adders are used to mix two UHF and MV signals into one. The switching principle is similar to dividers. The adders also have a damping percentage. In general, any cable splicing results in attenuation.

4. Other devices.

Other devices include, for example, antennuators, the purpose of which is the opposite of amplifiers, namely, to attenuate the signal. Such devices are needed when you live near the tower, or in its immediate vicinity, where the signal is too strong. The antenna is mounted in the "break" of the plug.

Well, this is where we will probably end our article on terrestrial television. If you have any questions, ask them on our forum in the section "Broadcast TV", just do not forget to read the rules of the section)

On this I say goodbye to you! Good luck!) P.S. Do not pay attention to the text below, this is for indexing)

On our website you can always buy antenna for home, buy an antenna for a cottage, or for giving and just as simple indoor antenna with amplifier and without. Choice antennas for the city and for the region we have quite a large one, and therefore you can always find an option terrestrial antenna for yourself. except analog television reception, antennas receive and DVB-T2 signal. Terrestrial digital television in Nizhny Novgorod and areas is now gaining great popularity, and therefore antennas for digital tv will be needed if you are still late purchase an antenna DVB T2 then we advise you buy her cheap... By mime outdoor antennas in Nizhny Novgorod can buy indoor antenna for digital tv which will provide confident receiving DVB T2 signal in the vicinity of the transmitting station. In addition to antennas, our store has amplifiers SWA , LA , LSA , Alcad other. Buy amplification boards for antenna Locus, Delta or Alpha you can also online, or in a retail store. Amplifiers for terrestrial antennas provide stability signal reception in places with an unstable signal.

Installing an antenna amplifier is necessary to improve signal quality.

the signal source is too far from the receiving point;
obstacles located in the signal path - trees, high-rise buildings, etc .;
landscape gap between the signal receiving point and the tower;
weak signal.

The next thing to figure out is the distance to the nearest tower.

For the correct choice of the coefficient, you must use a special table. This is not difficult.

Amplifier types

We will not go into the intricacies of the antenna amplifier design - for the layman, this information will be useless. Let's talk about two types of amplifiers and their purpose.

Amplifier SWA

Amplifier LSA

This type of amplifier has a very narrow range of applications. They are produced for the repair of failed Locus antennas. Certain LSA models can amplify their matching Locus antenna models.

Power Supply

Installing the antenna booster

Connecting a TV cable to a TV

The first step is to choose a TV cable. This is a very crucial moment, since even an expensive TV will not provide you with a high-quality picture without a properly selected wire.

Antenna grounding

However, this is not all. The antenna must be grounded before use. This is a very important and responsible procedure, and it is worth approaching it responsibly.

That's all. In this article, we talked about the existing types of antenna amplifiers and how best to install them. We hope the article was informative and helped you in this difficult question.

I was already wondering where to buy a new splitter, when suddenly it comes to me el_pir who also helped build the barn that day. I described the situation to him, and he says:
-And pull out the incoming antenna wire from the splitter!
-Do you think the antenna is short? - I answer and disconnect the wire and, lo and behold, the power light comes on!
I measure the resistance of the antenna amplifier, and it is 43 ohms. el_pir rummaged in his smartphone, and said that the input resistance of the amplifier should be kilo-ohms (in fact, about 95 k Ohm). Well, he is an electronics engineer, he understands this. Then, before it got dark, I climbed onto the roof and disconnected the antenna. I measured the cable - the cable is in order. So it’s like an antenna.

I had a used, but more modern LSA-417-05 antenna amplifier in my magic shed, pulled out not so long ago from the antenna

My fellow villagers periodically turn to me with one common problem: the antenna with the amplifier suddenly stopped working.

In view of the fact that we have more than 50 km to the city, it is clear that there is nothing to catch here without a good antenna with an amplifier. The overwhelming majority of the local population have LOCUS antennas, broadband, MV and UHF bands, based on a multi-element wave channel, with a built-in amplifier board.

The Ufa TV Center still broadcasts 14 analogue channels, and many residents of our village already use this antenna to receive digital TV, which means it makes sense to tinker with the repair of this amplifier.

Although the word "repair" in this case is incorrect, rather "replacement with a similar one".

The fact is that the amplifier board from the LOCUS antenna is on sale in some electronics stores, but for about 200 rubles apiece, and after being replaced for more than a year, for some reason it does not work.

Therefore, leaving quality issues on the conscience of the Chinese manufacturer, I chose other, inexpensive, and, as it turned out, more reliable SWA antenna amplifier boards for repairing these antennas.

Here is our hero - the SWA 9999 antenna amplifier board.
It should be noted that the best results are obtained using the following board models: 9001, 9501, 6000, 3501, 2000, 9999 (listed in order of amplification deterioration). SWA cards with different numbers will not work, they are designed for different frequencies and have a weaker gain.

And this is the burned-out LSA-417 board from the antenna.

The side contacts will still come in handy from the motherboard, so we unsolder them.

We solder two single-core copper wires in insulation to the new board.

Solder thin shielded wires from the decimeter section of the antenna parallel to the output of the balun. Accordingly, the central vein to the input capacitor of the board, and the braid to the ground bus.
The wire from the body of the antenna itself (white) is also soldered to the ground bus of the board.

To prevent the parts on the board from touching the antenna mount, we put a piece of plastic between them.

We connect the drop cable and insert the new amplifier board into the antenna box.
We solder the wiring from the board to the previously saved side contacts, insert them into their original place, and then fasten the side vibrators of the MV range to them.

We close the standard cover with latches and tightly wrap the connection with electrical tape.

We connect the antenna to the TV and check the reception of the channels right here on the ground. At least three to four of the strongest channels should be received (albeit with interference). The local Bashkir channel, for example, is received directly on the ground, in color and without interference. Well, after checking, you can climb up, onto the roof or raise the antenna to the mast.

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