Buying a TV into your home is a very serious matter that you need to seriously prepare for. If your home has an expensive screen, then you should provide the equipment with the best possible components. Coaxial cable for TV - which one to choose? If you are fond of repairing and at the same time the question of buying TV equipment is brewing, then you should choose the best antenna cable for TV. Obviously, there are thousands of different variations of this equipment on sale, which differ in name, parameters, marking and color. AND different types Televisions offer the user “their” components, but this is not always the best option.
We will not hide the fact that such an abundance of technology can confuse even a qualified specialist, so today we will talk about the most good models which you should pay attention to.
Important! If you have at least general idea about the topic about which on this moment in question, you will be interested to know:
Basic concepts and parameters
Before you start looking for an answer to the question of which antenna cable is better to use for a TV, you should understand the main nuances of the device.
Device
The principle of operation and manufacture is not much different. There are main cores that are hidden in the insulation, and a shield and braid are laid on top of this material. The "cherry" on this "cake" is the protective shell.
Important! You should be aware that conductors of this type are called coaxial.
Materials (edit)
A good coaxial cable for your TV will include such materials.
The inner conductor is capable of transmitting data in all forms known to television and powering the satellite converter. That is why copper and steel are present in the materials, more precisely:
- the central core itself is made of steel;
- a small layer of copper material is applied on top of it.
Important! The copper core itself is only needed by the satellite, and the rest is handled by a steel component with a copper layer applied.
The braid and shield are designed to provide protection against a wide variety of interference. The better these parts are, the better the TV signal itself will be:
- To create a screen, aluminum or lavsan foil is used.
- Copper or aluminum wires are suitable for braiding.
Important! There is a value that characterizes the level of protection. It is best to give to those devices for which this value varies from 60 to 80 decibels.
Inside there is a dielectric made of plastic, which reliably hides the central conductor, protecting it from different kinds damage and isolating from contact with the shield or braid. The outer shell hides all the filling and helps to avoid mechanical stress. At the end of the work, all installed cords can be hidden in
Marking
TV antenna cable - how to choose? The marking of the product should also be taken into account. Most often, the following brands of coaxial conductors for the antenna are used:
Important! Each of them has a characteristic impedance of 75 ohms and is suitable for only one TV.
Review of popular models
In order to find the best antenna cable for your TV, we have compiled a small rating of popular devices.
RG-6
This model was provided to the market by a manufacturer from Russia, but the production, oddly enough, is Chinese:
- CZH (central core) is made of copper and has a thickness of 1 millimeter.
- This component is hidden inside a shell made of classic polyethylene foam.
- The conductor is equipped with a foil shield, aluminum or copper braid and protective material.
- The average wire thickness is approximately 7 millimeters.
Important! This brand is perfect for cable, classic and digital television... A meter of this product will cost 6 cents.
RC 75
An analogue of the previous product, which is also produced in Russia:
- CF made of copper with a thickness of 1 millimeter, PE-dielectric and a copper shield.
- A single screen allows you to use the explorer to play and transmit terrestrial, as well cable TV.
- Dual screen of this type suitable for a satellite dish, which is installed inside the building.
Important! A meter of this product costs about 9 cents.
RG 59
A small-sized version of the first member of the family with a thickness of 0.57 millimeters and an outer diameter of 5.5 millimeters. Deals with everyone known species signal transmission. It can work with satellite data at a distance of about 200 meters.
Unfortunately, the thinness increases the attenuation, which negatively affects the image quality with every meter of distance.
Important! This model can only be used for one TV receiver. The product is very fragile and can easily break when exposed to external mechanical impact. Despite this, such a purchase will cost 16 cents per meter.
SAT 50
Italian products from the manufacturer Cavel:
- TsZh is made of copper and has a thickness of 1 millimeter.
- The screen of the product is reinforced and has two layers of foil and braid at once.
- The shielding factor is about 60 decibels.
- The shell material is a PEG dielectric.
- It has a PVC outer sheath and a cable diameter of 6.6 mm.
Important! Work with all types of TV signals. A meter of this product costs around 17 cents.
Still undecided on which coaxial cable to choose for your TV? Then we go further according to our rating.
SAT 703
The brainchild of the previous manufacturer:
- The conductor is made of copper and has a thickness of 1.13 mm.
- The screen, again, consists of two layers of material (aluminum + plastic).
- The copper-tin braid provides a good shielding factor of 80 decibels.
- The shell is the same as that of the SAT 50, which makes this option highly recommended for those who are interested in watching satellite TV.
- The quality of the materials allows laying down the street.
Important! A meter of such a guide costs about 24 cents.
You are still interested in the question: antenna cables for TV - how to choose? You will be able to reason rationally if you evaluate the quality of the next product.
Satellite and digital television appeared a long time ago, high-quality television broadcasting in every home is no longer a rarity, but nevertheless, few people know which cable is best for a TV. It is he who ensures the quality of the received signal. If you switched from analog television on satellite or digital, you may have noticed that quite often the channels were not caught at all, the image became blurry, there were various sound and visual interference. The most common reason for this is an incorrectly selected cable that does not meet the new signal requirements. Therefore, you will have to change the cable.
For modern television broadcasting at home, coaxial tv cable b, but choosing the right one is not so easy. First of all, it is necessary to determine what are the requirements for cable network are nominated, namely:
- the type of TV signal received (analog, digital TV broadcasting);
- number and type of televisions;
- place of use: tv cable in the apartment or in a big house;
- the location of the TV signal source (dish, shield or antenna);
- system length.
Cable structure for tv broadcast
At the moment, there are a lot of TV cable models, however internal organization they have identical:
- the inner center conductor is made from solid or stranded wire or copper tube; the material of the conductor ensures the range of the TV signal and the possibility of deformation;
- dielectric layer (insulation) is designed to ensure the immobility of the conductors; most often made from various polymers; signal attenuation and wave impedance depend on the material of the interlayer;
- plexus - outer conductor; made from foil, aluminum film or metal wire; provides protection against external electromagnetic influences;
- the outer sheath is designed to protect the entire cable structure from various external influences;
TV cable - which one to choose
The modern TV broadcast format involves the use of a cable with an impedance of more than 75 ohms. it universal requirement to all television cables, however, in each case, other criteria should be taken into account.
Outer shell structure
The cable can be black or white... It depends on the material of the outer sheath. Polyvinyl chloride (black) or polyethylene (white) are often used. Previously, it was believed that for external television it is necessary to use a black cable so that it can be clearly seen on a white wall, but now this is completely irrelevant, therefore cables with a protective sheath made of polyethylene are used for both internal and external works... More important is the thickness protective shell: the bigger it is, the better. But if the cable is too thick, the bending of the structure will be significantly limited - sometimes this is important, so this also needs to be considered.
Outer conductor characteristic
Outer conductor must have two shielding layers - one layer does not meet the transmission requirements of modern television broadcasting. Previously, a simple braided wire was used as a material, but such a cable cannot provide quality signal satellite or digital TV broadcasting. To do this, you need to take a cable main screen which is made of metal foil and which has an additional braid. It is made from an alloy of various metals in order to reduce possible interference from household appliances.
Central core characteristic
The central core is most often made of copper or an alloy of other strong metals, which must be clad with copper to ensure high strength. Experts recommend using copper cables, although there is no evidence that copper is better at transmitting a signal than an alloy of other metals. However, metal alloys significantly increase the cable diameter, which is not noticeable when using copper. For a television cable, the smallest possible diameter is important, since it is convenient to lay it. For home use a cable with a core diameter of 3.5 mm is quite suitable. More is possible, but not less.
You can choose an inexpensive cable with a core diameter of less than 3.5 mm, but then you will have to buy special equipment to improve the signal quality, therefore, the choice of the conductor cross-section must be taken very seriously.
Manufacturer
At the moment, the market is full of various manufacturers of TV cables, because it is very profitable, however, not everyone produces a cable that conducts a signal without interference. Before you buy a TV cable, study the reviews of each manufacturer on the Internet, and also consult the sellers.
Length of cable
It is impossible to predict in advance all possible interference when laying the cable, so it is necessary to take it with a margin. It is best to take a cable twice as long as it is supposed to be laid, since some section of the cable may be damaged and it will be necessary to replace it. But mechanical damage occur rarely, but rearrangement of furniture is much more frequent. If the cable does not have a margin of length, then the TV will be chained to one place, and there can be no question of any rearrangement.
The thickness of the cable itself also depends on the length. The longer the network, the thicker the cable must be so that there are no external influences on it. In addition, remember that the antenna requires a larger cable size to prevent interference. Some cable models require certain installation conditions, which is very important to consider if you decide to conduct television yourself.
Can't name best tv cable, although one of the common marketing ploys is the so-called "special digital" cable, which supposedly only accepts digital TV broadcasting... Satellite and digital television operates at frequencies from 5 to 3 thousand MHz - it depends on the frequency whether the cable will receive a signal, and not on the "specialty" of the cable itself.
Where to buy TV cable in Moscow wholesale
AVS Electronics itself is a manufacturer coaxial tv cable, at the same time, a partner and official distributor of well-known trade marks of this cable product range. For example, you can always order from us in bulk and buy TV cable SAT 703. There is always a large assortment of RG 6 television cables, which can be bought in bulk at favorable and cheap prices.
More detailed information about the technical characteristics of the television cable, its analogs and availability can be obtained from the specialists of AVS Electronics.
We invite you to cooperation!
Why does the TV show badly? Are some cable channels not tuned in? How can you tell if your TV cable is wired correctly? Questions of this type are not uncommon. Ordinary people want to understand them in a simple way. Indeed, as practice shows, there are many home-grown TV masters today. And their services (already paid for) are money wasted. So, let's try to make out a few of the questions posed, one of which says - which is the best TV cable?
TV cable
So let's start with appearance and cable structures for cable television. Unlike power wires, it is always round. Moreover, its optimal diameter is 4-8 mm. There are cables and smaller diameters, and larger. We will talk about them separately.
Pay attention to the cut. It consists of several concentric layers.
- The central core located in the middle is a copper or steel (copper-plated) wire. The core diameter is 0.3-1.1 mm.
- A dielectric envelopes it from above. This is usually white plastic.
- The third layer is the so-called screen, which consists of two layers: foil and braid. Some TV cable models may not have a foil layer. But remember that its presence in the structure speaks of high quality products. A braid is a mesh of conductors that are woven together in a cross-to-cross fashion.
- And the outer layer is a protective barrier against mechanical stress, made of either polyvinyl chloride or polyethylene. The protective outer layer can be either black or white.
Attention! If all these layers are present in the TV cable you are purchasing, then, without hesitation, purchase it. If some layer is missing, then look for the cable in another store.
Is it more expensive, is it better?
In this section, we will answer the question of how to choose a TV cable? And immediately make a reservation that in relation to this wire the postulate, the more expensive the better, will be invalid. Why?
The question must be answered from what exists main characteristic TV cable is the quality of the signal attenuation associated with the signal frequency and the length of the wire. So in in this case it will be correct to assume that the lower the given indicator, the better. It should be noted that each television channel its attenuation rate due to a certain frequency of the incoming signal. By the way, the unit for measuring the attenuation is dB / 100m. That is, complete dependence on frequency and length.
Therefore, before choosing a cable, you must first decide on the television system that will be installed with you. Why is it so important? The thing is that terrestrial television and satellite television have a different frequency range. And if you have installed a cable that has a signal attenuation rate suitable for terrestrial television, then the signal from the satellite may not pass. That is, it will pass for sure, but with great hindrances.
- Remember, we talked about the diameter of the television cable. So, you shouldn't buy a product with a diameter of less than 3.5 mm. This wire can only transmit frequencies in the meter range. That is, your TV will only show such channels as ORT, NTV, RTR and others. But the channels of the decimeter range (Domashny, Kultura, STS, TNT and so on) you will no longer see, but oh satellite signal forget it altogether. Plus, the shielding characteristics of this cable are in doubt. And that's not good either. Of course, if you try, you can make a cable with a meter range visible for all channels. To do this, you will have to install an additional head-end station through which the decimeter channels... But it will require additional costs... To summarize: the thicker the TV cable, the better (by reducing signal loss). It is he who is needed.
- There is still a cable of the RK-75 brand with one shielding layer on the market. This is an old-style domestic product. So it has a very high attenuation rate. You shouldn't buy it.
- An interesting sales situation has developed. Even in some specialty stores, you come across poor quality television products on high price... It is perfectly packed in a beautiful wrapper, it has a certificate, accompanying documents, but the price does not match technical specifications... Exactly the same option on the regular market costs several times cheaper. So be careful.
So let's summarize. First, pay attention to the wire diameter. Optimal size 6-7 mm. Second, the shielding layer. There should be two of them: the lower one is foil, the upper one is a braid of copper wires treated with tin. Thirdly, choose the right manufacturer. Of course, brand names are preferred. This cable is from Belden, Mediaflex, Commscope, and so on.
Attention! If, during operation, the television cable will be subjected to rather harsh conditions (laying in the ground, overhead lines on the street), then it is better to purchase a special model with impregnation. This must be indicated in accompanying documents products.
And one more piece of advice, which concerns the following question: is it possible to lay two cables next to each other: power and television? You can, you just have to purchase a television with a diameter of 10 mm with increased protection against interference.
Mounting
And the last question that needs to be analyzed in this article is how to connect the cable to the TV? Let's start right away with the recommendations.
- The gasket contour should be located as far as possible from power circuits and powerful electrical appliances(refrigerator, washing and Dishwasher, iron, microwave, etc.).
- You can lay the cable for cable TV next to any low-current circuits (telephone, internet, alarm).
- Try to reduce the number of connections. The best option- one piece TV cable for the whole apartment.
- If you cannot avoid dividing the circuit into sections, then when connecting the two ends of the cable, use factory-made splitters and splitters. No twists that will reduce the quality of the incoming signal.
- If it is impossible to avoid the intersection of the TV wire with the power circuits, then it is best if this intersection is made at an angle of 90º.
- Do not roll the gasket into turns or bend it at an angle greater than 90º.
- The section to the first splitter from the switchboard box must pass in a wide channel. Other contours of the low current can also be laid here.
- When connecting the cable in the switchboard box, only soldering must be used (this is the question of how to connect correctly). In this case, you should not greatly expose the cable itself. The smaller the unshielded area, the better.
- The splitter must be installed in an easily accessible place. The best option is to put it in a special box.
Additional devices
Usually, there are several devices in the TV cable wiring diagram. If an apartment building is considered, then the first device that receives a signal from the antenna is a splitter. That is, from common antenna the signal through this device enters the apartment. From it, you can spread the wiring even in different rooms, it all depends on the number of posts.
A signal amplifier can be installed before the splitter. It makes no sense to explain what this device does. Further, the latter uses the so-called adder. Its purpose is to sum signals from different frequencies into one.
Conclusion on the topic
Connecting a television cable for cable television (digital) can be done with your own hands. There is nothing complicated about it. You need the tools and some knowledge that we have discussed in this article. A little wiring skills won't hurt either.
To connect your TV to cable communication or antenna, you need to buy special cable, process its ends and put on special plugs. If all the preparatory moments for connecting the TV are carried out incorrectly, analog channels, like digital ones, will show a low-quality picture from bad image and interference. This will happen because the antenna cable for the TV is losing signal somewhere or the installation was made with errors.
Choosing a TV cable
Select high-quality and necessary materials to connect a TV is the most important event. Even the most advanced and modern source signal and properly fitted plugs cannot guarantee a high quality picture if the wrong telecable is used. Therefore, the question arises of how to choose the right TV materials to connect.
How to choose an antenna cable for your TV?
Before you go to buy everything you need, you should understand the principle of operation of high-frequency current in the cable. In a home power grid, current flows in the wire across the entire cross section. The television signal flows through the antenna conductor in a completely different way. Everyone knows how water is squeezed out in washing machine: The higher the speed, the stronger and faster the centrifugal force removes water from the laundry. For example, you can also cite one of the moments of childhood, when we rode on a carousel, and how this force pressed us into the back of the chairs, pushing us out.
An antenna cable for a TV works in the same way, more precisely, the signal current that moves in it. The higher frequency signal, the closer to the surface of the cable it is distributed. If a current is passed with a frequency of 1000 MHz at the same time 10 mm copper wire and copper tubes with a wall thickness of 1 mm, then the losses will be the same. Therefore, in military and space technologies for the production of antenna cables, thin layers of gold or silver are used, which prevent severe signal loss. This is a very expensive method; it is not used in domestic conditions.
Due to the fact that the TV signal in the cable is small, it is impossible to measure its frequency at home without expensive devices. Only after connecting the cable will it be possible to find out the quality of the transmitting signal.
Antenna cable for TV. Which one is better to choose?
Today, the electronic goods market offers various materials to connect to a signal source, the cost of which fluctuates in wide range... All of them differ from each other not only in price, but also in the quality of performance. The most popular and widespread was the coaxial antenna cable for TV, which is presented by different manufacturers and stamps. Such a cable is successfully used to work with analog and digital television signal and even for high-frequency satellite dishes... The cable markings indicate the size of the signal loss.
Choosing the right material
What is the best TV antenna cable to buy? Experts advise when buying it to pay close attention to the markings on the surface of the cable. It should have a characteristic impedance of 75 ohms. All television devices are designed for such parameters.
The diameter of the cable sheath cannot be less than 6 mm. The core and braid must be copper. These are the characteristics of cables of SAT 703B and DG 113 brands. But the RG 6U brand has a steel central core, which is electroplated with copper, aluminum foil is used for the screen, and copper alloy is used for braiding. This TV antenna cable is budget option... Thus, it becomes clear what material should be taken to connect to the signal source.
Connection process
You do not need to invite special workers to connect to the TV. Everything can be done on their own if you follow the recommendations.
Analog and digital signal in the cable is only thousandths of a volt, so connecting the antenna cable to the TV is not dangerous for humans. It can be easily cut, while the other end can be included in the device. It is also absolutely safe if there is a short circuit between the core and the screen film.
We install the plug on the cable
The plugs on sale can be of three types, depending on the diameter of the cable. Therefore, when buying this device, it is necessary to check that it fits the antenna wire. Most experts advise purchasing the F-plug as it matches the signals coming from analog and digital sources.
How to connect the antenna cable to the TV? This technology is very simple. First, you need to split the cable itself, wrap the screen film, you can not do this, but the plug is held tighter in the first case, and screw on the connector.
In order for everything to work out neatly, you should carefully cut the top layer of the cable with a clerical knife, being careful not to damage the screen film. The incision should be several centimeters long.
After the incision top part is folded back and cut off, as it is no longer needed. Foil and braid are wrapped back.
There is one secret that many do not know: aluminum foil with inside processed with a thin layer of plastic for strength, it is impossible to clean it. If you put a nozzle on it, then the contact will be very poor. To prevent this from happening, the folded foil (half of it) should be folded back. Thus, the conductive layer will be on the outside.
There are times when the diameter of the plug is larger than the wire. Therefore, how to make an antenna cable for a TV so that the attachment does not fall off and the signal quality is not disturbed? To do this, the end of the cable is wrapped with electrical tape, then the plug itself will not go anywhere.
Then the insulation of the core is removed, a nozzle is put on the foil or electrical tape, a part of the unnecessary core that exceeds 3 mm is bite off with pliers, and that's it - the cable for connecting to the TV is ready.
Sometimes the design of the TV or the location of it does not allow you to connect the antenna directly. In this case, 90 ° bent plugs are commercially available, which are perfect for any position.
Old types of attachments
Before the advent of all-metal plugs, nozzles of a different design were used. They didn't need soldering either, but they wore a little differently. First, the upper metal part was unscrewed from the plastic base. Then the main body was put on the antenna cable for the TV, the winding with the screen was cut and the rest of the plug was screwed on top.
If there are no attachments at hand
It often happens in life when you need to find something, but it is not. It happens that you urgently need to connect the TV to the antenna, but there is no plug at hand. Is it possible to get out of this situation? Of course you can, because the cable can be connected without a nozzle. To do this, remove the top cover of the cable 5 centimeters long, turn off the screen, remove the insulating material and bend the core into a loop. It is advisable to wrap the foil with electrical tape.
To prevent the wire from falling out of the socket, fix it with matches or toothpicks.
Bad signal
There are times when there is a sharp deterioration in the image quality of the picture. For this there may be different reasons, the most common of which is cable damage. How to fix an antenna cable for a TV if a break has been found? After all, here you cannot act as with an ordinary wire: twisted the gap together and insulated the place of twisting.
To get out of this situation, there are special metal connectors on sale that look like a plug that is connected to a TV. Having found the place of damage on the cable, it is divided into two parts. Each part is cleaned as described above (as when preparing the wire for putting on the nozzle). After preparing the parts of the cable, they are inserted into the connector and tightened with a special nut.
If there is not enough length
The extension of the wire takes place in the same way. Many found themselves in a situation when they moved furniture with a TV or outweighed it if it was wall-mounted, and now there is not enough cable to connect. Therefore, the question arises of how to lengthen the antenna cable for the TV.
In the same way, the connector is taken and the required length is built up. However, there are a couple of "buts" that you need to know:
1. When lengthening the cable, it is advisable to buy exactly the same brand of wire that is currently available. Never take a cable with a lesser marking. Otherwise, the signal quality will deteriorate.
2. When adding and connecting a TV cable, even if everything is done carefully, the image quality may drop somewhat. No matter how well the connectors are screwed on, a break in the solid core will still affect the signal in the worst side... But it also depends on the transmitting source: if it is strong enough, then a cable breakage and its subsequent connection will not affect the picture quality.
Connecting multiple television sets
Connecting multiple TVs to a network or antenna that carries an analog or digital signal is easy. The only thing that will need to be put on is not one plug, but several. For such a case, you can buy a special splitter, popularly called "crab" or "splitter".
This fixture has one antenna input and multiple outputs for other wires. In order for the "crab" to function properly, all of its outputs are connected to television devices. If there is a pair of outputs, then two devices are connected, if three - then to three TVs. There should be no free exits. If an unused connector remains, then a plug should be installed on it, but the signal quality will deteriorate. Therefore, it is necessary to purchase a "crab" with as many outputs as required to power the devices.
Experts emphasize that when the cable is connected through a “splitter”, the signal quality will still be lower, even if some TV does not work. This is due to the loss of current in the "crab" itself and in the additional wire. There is even a table like this:
Two TVs connected - signal loss - 30%.
If the incoming analog or digital signal is already weak, the image quality will drop sharply due to the connected crab. Thus, the more devices are connected, the worse the television picture will be. However, in cities where signal sources are located nearby, which in addition pass through special amplifiers, such problems practically do not happen. Residents may face similar difficulties countryside, and even then, if they still have not satellite dish rather a simple analog antenna.
Amplifiers
If suddenly after connecting the "crab" the signal becomes worse, then you can put a special device in front of it - an amplifier television signal... Such a device is separately powered to electrical network... It should be placed as close to the antenna or TV as possible. There are models of such devices with several outputs. They are set if you want to connect a certain number of television sets.
Outcome
In conclusion, I would like to add that the knowledge of how to choose an antenna cable for a TV, and the ability to properly mount it are the most important points in connecting the antenna to the receiver. To do this, you should buy a good and quality wire... Now in many houses and apartments they hide television cables in the wall, in a Western manner, with only a special outlet for the antenna. And this is very good, since the cable is not conspicuous and is safe and sound without damage.
If this is not possible, then it is recommended to at least close the wire in a special plastic box. After all, if it is damaged, the image quality will drop. It is best to avoid this so that you do not pull a new cable or put in connectors, which can also affect the loss of signal.
Seal
Cable deviceIn about why the signal jumps has already been mentioned, in order to avoid some problems when receiving digital television, it is better to use a high-quality television cable when installing the antenna, which one is better to choose and why I will try to explain.
Cable device
I usually work with a SAT 50 cable, and to make it less clear why I prefer it, and which of the characteristics are most important, let's look at the device. coaxial cable... The figure above shows what it consists of.
- Outer shell. Durability depends on its quality.
- Braid. The most important parameter... Outer conductor. The resistance, the quality of the shielding, that is, the immunity from external electromagnetic interference, depends on the density of the weaving and the material.
- Foil. Internal screen.
- Dielectric. The most important parameter. The characteristic impedance and signal attenuation depend on the material and quality.
- Central vein. Inner conductor. The signal transmission distance and bending radius depend on the material.
It used to be accepted that the black wire is for outdoor installation, now this is no longer so critical, so, for example, the SAT 703 cable, having a white color, can be used for both indoor and outdoor work, and the strips on it serve for ease of wiring so as not to get confused when laying cables, where is cable TV, where is terrestrial, etc.
Still, I recommend that if you want to buy a durable wire, then take it with black insulation or look at the characteristics of the one you are interested in before purchasing. As already mentioned, I think the best - although SAT 50, the RG 6U with a black protective shell is not so bad.
The braid can be made of copper, aluminum or copper-plated conductors with different weaving density. How large quantity conductors contains a braid, the higher the protection against external interference. For example, TV cable RG 6 has 48, and SAT 703 has 64 conductors. It should also be noted that copper braiding provides more best parameters however, its use increases the cost of the cable.
In front of the dielectric there is a layer of aluminum foil on a polyester substrate. The use of double shielding significantly improves the performance of the coaxial cable.
The center conductor can be made of copper or copper clad steel for increased strength.
The use of expanded polyethylene (PEE) as a dielectric reduces polarization losses and attenuation of the signal. When choosing a television cable, it is better to opt for just this.
Choosing a cable
The most widespread today, perhaps, is the RG-6U cable, with quite satisfactory characteristics. It can be purchased in many stores, while it is most often offered with a white outer shell, and although sellers claim that it can be used as a street one, it is better to look for it with black insulation. As a television, it is not the best, mainly due to a quick failure when used outdoors and a higher attenuation coefficient. So with a longer cable length, for quality reception TV signal, it is better to look for a better one.
The best in terms of price-quality characteristics, in my opinion, is the SAT 50 television cable, it is an analogue of the SAT 703 wire, having almost identical parameters, but SAT 50 is somewhat cheaper.
Feature Sat 703:
- The central core diameter is 1.13 mm.
- Cable thickness - 6.6 mm.
- The minimum bending radius is 70 mm.
- Maximum current - 8 A.
- Frequency range from 5 to 2150 MHz.
- Characteristic impedance - 75 Ohm.
- Attenuation at 862 MHz is 18 dB / 100 m.
- Shielding factor -> 80 dB.
- The linear capacity is 52 pF / m.
- Operating temperature range from -40 ° С to + 80 ° С.
- The permissible operating humidity is 100%.
- The minimum installation temperature is -5 ° C.
- Service life - 15 years.
As already mentioned, these cables have almost the same parameters... The difference between them is in the thickness of the central core, for sat 50 it is 0.02 mm thinner and has an aluminum braid instead of a copper-plated one.
