On sale for specific models satellite receivers, there are additional tuners.
And why do I need a satellite tuner, the receiver shows so well?
Everything is correct, however, technologies do not stand still, they develop and we use them with pleasure. And the fact that we are often offered a new digital broadcasting standard.
Always in this case, we are told about a better and "live picture". To enjoy all the delights of HD images or to make the transition towards terrestrial TV broadcasting, you need a receiver that can provide it all.
To take full advantage of the digital signal, you need additional installation in the satellite receiver.
And so, a satellite tuner and what it can do.
The satellite tuner can provide reception:
DVB-C (cable TV);
DVB-S and DVB-S2 (satellite TV);
DVB-T and + DVB-T2 - terrestrial (terrestrial) TV.
Let's consider a few of them.
Vu+ DVB-T2-C USB Turbo external combo tuner.
Its mission is to expand the possibilities for receiving digital terrestrial and cable channels on Vu + satellite receivers.
The connection is very simple, using a USB cable.
Remarkably, it does not require additional power supply. An external tuner is used to receive DVB-T2 digital terrestrial and DVB-C cable channels on satellite receivers manufactured by Vu+.
Supports connection to VU+ receivers: Zero, Uno, Solo, Solo2, Solo SE, Duo and Duo2.
Let me remind you that an image must be installed in the receiver, which contains drivers for the tuner to work fully.
In images from the VTi team, the necessary drivers were added starting from version 8.2.x, in BlackHole images starting from version 2.1.6.
Earlier versions of these command images do not contain the actual drivers for this combo tuner. To connect the tuner to the receiver, you must turn it off using the toggle switch on the rear wall.
Then you need to go through the menu to the tuner settings and make sure that he saw the connected selector.
Next, the necessary parameters for channel scanning are configured. In addition, when choosing the DVB-T/T2 standards, it is supported to turn on the +5 Volt voltage supply to power the active terrestrial antenna amplifier.
Tuner specifications:
DVB-T2 COFDM FEC Demodulator (LDPC/BCH)
Receiving frequencies: 42 ~ 900MHz
Supports up to 255 PLPs
FFT: 1K, 2K, 4K, 8K, 16K, 32K
Modulations: QPSK, 16-QAM, 64-QAM, 256-QAM
Frequency bands: 1.7 5, 6, 7, 8 MHz
DVB-T COFDM Demodulator FEC (BCH)
Receiving frequencies: 42 ~ 900MHz
FFT: 2K, 8K
Modulations: QPSK, 16-QAM, 64-QAM
Frequency bands: 5, 6, 7, 8 MHz
DVB-C (ETSI EN 300 429)
Receiving frequencies: 48 ~ 870 MHz
Modulations: 16-QAM, 32-QAM, 64-QAM, 128-QAM, 256-QAM
Symbol rate: 1~7.2M
Weight: 0.5kg
Dimensions: 13 cm × 7 cm × 5 cm
Vu+ Hybrid DVB-T2/T/C tuner.
Replacement DVB-T2/T/C hybrid tuner that adds terrestrial reception capability to your Vu+ Uno, Vu+ Ultimo, Vu+ Solo SE, Vu+ Duo2, Vu+ Solo 4K satellite receiver digital television and cable digital television
Replacement hybrid DVB-T2/T/C tuner, the installation of which adds to your satellite receiver the ability to receive digital terrestrial TV and cable digital TV.
In the Vu+ Ultimo/Duo2/Solo 4K models, several different tuners can be installed at once, that is, a combined version of DVB-S2 + DVB-T2 + DVB-T is possible.
Technical specifications:
VHF channels: 2-12 (49-230 MHz)
UHF channels: 21-69 (470-861 MHz)
DVB-C HDTV compatible
Input frequency range: 51-858 MHz
Symbol Rate: 1-7 Mbaud/s
Input Impedance: 75 ohms
Tuner Input/Output: IEC connector
DVB-C/DVB-T/T2 selection via software
Tuner DVB-S2 for Openbox S9.
Replacement satellite tuner for Openbox S9 receiver. Supports signal reception in DVB-S and DVB-S2 standards.
This tuner can be used to replace the DVB-C or DVB-T2/C selector in the Openbox S9 receiver, if one is installed, to take full advantage of the reception capabilities of two DVB-S2 satellite tuners
DVB-C/T for DM 800SE / 820 / 8000 / 7020HD / 7080.
Replacement cable and terrestrial tuner for the original receiver Dreambox DM 800 SE / 820 / 8000 / 7020 HD / 7080. Supports signal reception in DVB-C / T standards.
It is used to receive digital cable and terrestrial television.
This tuner is installed in the original Dreambox DM 800 SE / 820 / 8000 / 7020 HD / 7080 receivers. It can be used to repair or modify the device by replacing a faulty or problematic selector.
From China.
The DVB-T/C/S2 tuner for Dreambox 800 HD se, as you can see, is not the original. Replacement combined tuner for Chinese receiver Dreambox 800 HD se.
Supports signal reception in DVB-T, DVB-C and DVB-S2 standards. It is used to receive digital terrestrial, cable and satellite television.
This tuner is installed in both early and late versions of Chinese receivers Dreambox 800 HD se. It can be used to repair the device by replacing a faulty or problematic selector.
And also to expand the capabilities of the receiver, to accurately receive cable and terrestrial digital broadcasting. Please note that this tuner does not accept a signal in the DVB-T2 standard.
DVB-S2 tuner for AzBox HD Premium Plus.
Allows you to replace the failed first tuner and use the second tuner in combination with DVB-C, DVB-T, DVB-S2 tuners.
Add the ability to simultaneously record a channel from one transponder or satellite and view a channel from another transponder or satellite.
Roughly, this is the case with the possibility of improving your satellite receiver. I think that the purchase is justified and the satellite tuner can give a bonus towards saving the budget.
After such an upgrade, you do not have to buy another satellite receiver.
Good luck Friends!
Despite the name, the article below will not tell you how to make a satellite dish yourself or solder a receiver. Just a note about what you need to purchase and how to install and configure everything yourself in order to watch TV channels "on a plate".
Suppose you live in a country house, in a village, or simply "away from civilization". But I want to watch TV, and not a couple of channels that are broadcast on the air.
(A small digression: digital broadcasting is actively developing at the moment. Find out if the number of channels you need is available in your area via terrestrial digital television? In this case, you will only need a set-top box to receive a digital signal (if the TV does not support it), and you can do not change.)
And so you decided to get satellite equipment for watching a lot of TV shows. First you need to decide: what channels do you want to watch? If your goal is various Discovery, Viasat and / or purely sports channels, then we immediately inform you: it is better to conclude an agreement with one of the companies providing satellite television services for a subscription fee. Such channels are transmitted in encrypted form and only some of them can be viewed "on the ball". Fortunately, in our time, companies involved in the installation satellite equipment and the provision of paid services is sufficient. You can order the installation even in the middle of nowhere, the only question is the cost.
If you decide to go this route, here are some tips:
1) if there are several offers, carefully study the list of channels provided in a particular package, the need to pay extra separately for sports, educational channels, etc.;
2) the possibility of free installation of equipment by the company's specialists;
3) Is there a separate charge for "kilometers to the client" at check-out?
4) it is not superfluous to pay attention to the reputation of the company: read on the Internet, ask around from customers;
5) to find out if the reception on the signal equipment installed by the company is of high quality in your area;
6) it is often possible to profitably connect (for example, equipment or installation at a penny price, half of the subscription fee for some time for a more expensive package, or even a couple of months of "freebies") for various promotions; as a rule, to attract customers, large firms hold them regularly: New Year, for the anniversary of the company, etc.;
7) well, and advice that is suitable for any transaction: carefully read the contract to be signed BEFORE signing, and not after, having come home and relaxing at your favorite TV channel; it may well be that a profitable, at first glance, action obliges you to use the services for at least a couple of years after the conclusion of the contract, otherwise they will write off the penalty, etc.; in general: be always on the alert! and enjoy watching!
For the same who decided to do everything himself material below.
Again, to begin with, let's make a reservation: this information is most suitable for those who live in the European part of the former USSR.
So what is needed?
For starters: desire! The desire to do everything yourself (well, or with someone's help). Without this, you may not reach a successful final. Then patience, a firm hand, a minimum of tools and a little money. About the last one. A lot depends on where, what and from whom you buy. But even when buying everything new, you can easily invest in the equivalent of 100 UDS, unless, of course, you are chasing branded equipment. And it doesn’t always make sense to buy everything new, for example, if there is a profitable second-hand offer on the market. The same plate or receiver is not a flash drive: they can work for a very long time and with high quality (although flash drives come across reliable :)).
And again a small digression: introduction to the world of satellite television. What is it all about? First, let's take a look at Wikipedia.
Geostationary orbit (GSO) - a circular orbit located above the Earth's equator (0 ° latitude), being on which, an artificial satellite revolves around the planet with an angular velocity equal to the angular velocity of the Earth's rotation around its axis. In the horizontal coordinate system, the direction to the satellite does not change either in azimuth or in height above the horizon, the satellite "hangs" motionless in the sky.
Those. somewhere high in space, at an altitude of about 36 km from the Earth's surface, an artificial satellite of the Earth, which is a powerful television signal transceiver, rotates synchronously with it. It picks up the signal from high power(powerful) terrestrial transmitting antennas and transmits it to a large area below it. In fact, there are many satellites. Each of them broadcasts to a certain territory according to the direction of its transmitting antennas. Several conclusions follow from this: the satellite is very far away, it is limited in mass, volume, power supply capabilities, it cannot be repaired in case of emergency, hence the complexity, duplication of systems, etc. From all this, the conclusion is: the power of the transmitting signal is limited, the signal from the satellite is very weak.
Then, a satellite is expensive, which means it must be used to the maximum: to transmit through it as many channels as possible to a large area of the Earth. The second conclusion is that conventional technologies, which are still used in our country for the transmission of on-air television and radio broadcasting, are not suitable - the number of transmitted channels is too small. Therefore, satellite television uses modern digital data transmission methods. The third conclusion is that all channels cannot be "stuffed" into one satellite for technical and organizational reasons.
Now let's see: what do these conclusions turn to us?
Requires weak signal reception technology. For this, a parabolic antenna is used. Here - the larger the area of the parabolic mirror - the better. Better for a signal that is collected and focused to a point. But the larger the antenna, the more expensive and heavier it is. It is more difficult to mount it, and fixing it securely to counteract a strong vert is generally a problem at home, as a rule. Therefore, in practice, they choose a size sufficient for high-quality reception, and this is for most of Eastern Europe a diameter of 0.8 meters or more. One of the most common diameters is 0.95 m.
There are two main types satellite dishes: direct focus and offset. The former have a signal receiver (feeder) at the focus of the parabolic mirror, which coincides with the geometric one. For the latter, the signal collected at a point from a parabolic mirror is reflected to a point below the geometric center of the antenna. This eliminates the shading of the useful area of the antenna by the feed and its supports, which increases its efficiency at the same mirror area with a direct-focus antenna. In addition, the irradiator is installed below the center of gravity of the antenna, thereby increasing its stability under wind loads. The offset antenna mirror is mounted almost vertically. Depending on the geographical latitude, the angle of its inclination varies slightly. This position eliminates the collection of atmospheric precipitation in the antenna bowl, which greatly affects the quality of reception. In the light, the antenna is not a circle, but an ellipse, elongated vertically. Offset antenna sizes are usually given in terms of gain equivalent to direct focus antennas. If horizontally this size is the same, then vertically it will be approximately 10% larger.
In the future, by satellite dish we will mean only offset, as the most common.
Direct focus antenna.
offset antenna.
A distinction is also made between fixed and movable antenna mounting. In the first case, the antenna is fixed to the base, in the second - to a special positioner. The task of the latter is to rotate the antenna in an arc for positioning on the desired satellite. The turn signal is usually given by a satellite receiver. It takes some time to accurately position to the satellite when you select a program from a different satellite than the current one. Technically implemented using a motor-actuator. Expensive, and, accordingly, not often found solution. It will not be considered in the practical part.
As mentioned above, the signal from the antenna is focused to one point, where a device called a converter is installed (LNB head or low-noise block converter or low-noise monoblock converter). Based on the name "satellite converter", it immediately becomes clear that this device converts (converts) something. An electromagnetic signal comes from the satellite, which is focused by the satellite dish on the converter and converted by the LNB head into an intermediate frequency. This is necessary so that the signal can be efficiently transmitted further along the cable. In addition, the LNB head amplifies the received signal. Further, the signal via the coaxial cable from the LNB head goes to the satellite receiver, which, as a rule, is made as a separate device (the so-called satellite set-top box), but can also be built into the TV.
Due to the fact that the satellite is very far away from the receiving antenna, you have to direct this same antenna very accurately at the satellite itself.
To summarize: in order to receive satellite television, it is necessary, in addition to the TV itself, to have the following equipment.
1) Parabolic antenna with a diameter of 0.8 m.
2) LNB head.
3) If you want to watch TV programs from more than one satellite, then you need a switch (switch) of DiSEqC heads.
4) Coaxial cable.
5) Satellite receiver.
This is where the theoretical part ends. Let's move on to the practical.
First, determine a place to mount the parabolic antenna. The height above the ground does not play a special role. It is important that there are no obstacles on the satellite-antenna line. Even tree crowns. For residents of Eastern Europe, the direction to the satellite will be south with an offset to the west or east, depending on the coordinates of the antenna and satellite. After all, we remember that geostationary satellites are launched into equatorial orbit.
The place for mounting must be strong and securely fastened: even the slightest vibration of the antenna will lead to signal loss. The best option is the main wall of the building or the reinforced concrete roof slab. But other options are also suitable, for example, a rigidly fixed vertically installed iron pipe of such a diameter that it does not sway when the wind gusts. Depending on the selected mounting option, select the appropriate fastener, which is fixed on one side to a fixed surface, and the antenna itself is attached to the other. As a rule, the antennas themselves are not equipped with such a part. It can also be a homemade product, the main thing to remember is that the antenna has a large windage and it will need to be accurately directed to the satellite, i.e. the reliability and ease of installation and configuration of the antenna itself is important.
Then choose, in fact, the antenna. Here it is better to ask the owners of satellite equipment in your area what diameter of the "dish" they use and whether the reception is good during thick clouds and / or rain. If, for example, it turns out that when receiving on an antenna with a diameter of 0.8 m, there is a signal loss during heavy rain, then you should think about purchasing an antenna with a diameter of 0.95 m. diameter doesn't matter. In addition, it may turn out that the person who provided you with the above information simply does not point the antenna accurately enough at the satellite. In general, the advice of those who know and the experience of neighbors with "plates" will help here.
After that, it is worth deciding from how many satellites do you want to watch TV programs? In theory, you can "overgrow" with antennas like mushrooms after rain, but in practice the most common option is one "dish", a mount for three receiving heads, three LNB heads, a DiSEqC switch for 4 heads, then a cable from DiSEqC to the receiver, the receiver itself, and from it to the TV. This is the so-called multifeed scheme. Let's look again at Wikipedia.
Multifeed - a set of devices (in particular, converters) designed to receive a signal from several satellites on one parabolic antenna. A multifeed is often called a bracket on which additional converters are mounted.
Such a scheme has been worked out for years, it allows you to watch a maximum of Slavic-language programs with a minimum financial investment. With three LNB heads, manually, without resorting to special equipment, it is possible to adjust the acceptable signal quality to the three most popular satellites in Eastern Europe: Amos 4W, Astra 4.9E, Hot Bird 13E.
The beauty here is that you can use one antenna for these satellites. First, an antenna with a central head is tuned, as a rule, on Hot Bird 13E, although it can be on any other. This changes both the position of the cymbal itself and the head to achieve the maximum signal level. The signal from this satellite with a quality setting will be the strongest. Then two others are tuned, but only by means of the heads themselves.
The most common type of LNB head is for one output, as the most popular and cheapest. From it, the signal goes through the cable to the DiSEqC switch or to the receiver. With this scheme, it is possible to serve only one TV with a signal. But there are heads for more outputs, which allows one antenna and LNB head to supply a signal to more than one receiver, thereby saving on equipment. This is very convenient if, for example, there is more than one TV in the house.
LNB heads: with one outlet and four.
In the second case, all 4 outputs can be connected to different receivers or DiSEqC. The receiver can simultaneously work with only one LNB head, and this is where the DiSEqC switch is needed if you want to watch several satellites on one "dish". Depending on the program selected by the user, it connects one or another LNB head to the receiver and supplies it with the supply voltage necessary for the operation of the head. In the vast majority of cases, there is only one DiSEqC between the LNB head and the receiver, but there are intricate schemes with cascading DiSEqC, but these are such rarely requested cases that we will not consider them.
Next, you need a coaxial cable to connect the DiSEqC and the receiver. It must be taken with a margin of a couple of meters relative to the distance that you are measuring. But remember that the longer the cable, the more loss it has.
It's time to talk about the receiver. This is a very broad topic.
For most TV lovers, the simplest receiver, such as the Orton 4100C, will do. But general information optionally satellite set-top box won't hurt anyone.
First of all, if you have a modern TV, then look at its instructions or read it on the Internet - it may happen that the necessary digital signal receiver is already built into this TV. If not, then here's what to look out for.
1) The number and type of signal outputs, as a rule, there should be at least three of them: a regular antenna output, SCART, a regular Video-out. In this case, it is easier to avoid a conflict when connecting if there is other video equipment that is also connected to the TV, such as a DVD or BLUE-RAY drive, game console, terrestrial digital television receiver, etc.
2) Does the receiver support HDTV (high definition television) reception? In our area, this is still a curiosity - the presence of clearly broadcasting (in the native language) HDTV channels, and even those that you can watch for free, but time does not stand still.
3) Availability of instructions in an understandable language.
4) Number and type of service connectors. They are necessary for flashing the receiver. Flashing is necessary to fix errors in the current firmware or to update the channel list. (Yes, yes, the receiver is the same specialized computer as a telephone or a router, and it also needs to “fill in” something from time to time). Ideally, there should be two such connectors: RS-232 (pins in two rows) and USB. If there is no USB, then it is not a fact that your computer has RS-232 (aka COM port), but if you wish, you can buy an RS-232-to-USB adapter. You will also need a so-called null modem cable. If there is no RS-232 on the receiver, but only UBS, then this is not so scary, because any (well, almost) Personal Computer older than 1996 has at least one USB port.
5) As a consequence of the previous paragraph - it is very desirable for the receiver to easily find the firmware, for example, the program code from the manufacturer, and the list of channels - on a specialized site, or both in the second place. There are many options for popular models, but for exotics you will have to look. But you have to be careful, it's not so hard to screw up the receiver.
6) If it is not possible to flash the receiver, then it must support adding satellites and channels, entering keys, in manual mode from the remote control. This business is tedious and requires care, but there is less chance of completely disabling the equipment. Although ... in capable hands ...;)
7) If you want to watch paid channels now or in the future, then the receiver must support special security cards with keys. This means the presence of a special connector and firmware support.
Over time, many people have old rubbish left - satellite receivers that break down, become obsolete or go to another operator and are thrown into a landfill or thrown into a "dark corner". But if you wish, you can assemble devices from nodes that are still useful.
the TV modulator itself from the satellite receiver.
For example, in the old receivers Tricolor TV, NTV +, Raduga TV, now deceased and others, there is an RF modulator for transmitting a video signal to the antenna input of the TV, which is essentially a miniature television transmitter with digital synthesis and control over the IIC digital bus.
I had a small number of receivers Tricolor TV GS DRE 5000, 7300 and the like without cryptomodules lying around, but I had the opportunity to keep 30 pieces for myself ... I missed it .... From the "motherboard" we literally cut out the modulator itself. On different motherboards modules of different names, but essentially the same, are made on the TA1297AFNG chip. The specification for this modulator indicates the supply voltage of +5 and +30V. Why 30 volts I did not understand, it works without it.
Modulator control circuit on ATMEGA8
This microcircuit is a ready-made PLL TV modulator for the UHF (UHF) range with an overlap from 21 to 69. You can programmatically adjust the spacing of the audio, the default width is 5.5 MHz. Too bad it doesn't support stereo sound. But we'll survive nothing. The signal from this TV modulator is fed through the TV cable to the antenna jack of the TV, but if desired, it can be transmitted through the wall, around the apartment or house, just connect external antenna and/or add a transistor amplification stage. Or connect antennas to a UHF amplifier by swapping the input with the output ... The signal source can be a satellite receiver, media player or video surveillance system.
another prototype...
But just by applying voltage, this TV modulator will not work, you need to assemble a device that sends control commands. In my version, the device is assembled on the popular and inexpensive ATMEGA8 microcontroller, I also used the indicator from the GS DRE 5000 receiver (it will come from all similar ones) to display the channel number.
When you turn on the power of the modulator, it automatically turns on channel 36, then you can select any channel in the UHF range with the control buttons. Subsequently, a firmware for the microcontroller will be written, where the channel number will be memorized when turning it off and on and adjusting the sound width of 5.5 - 6.5 MHz.
The quality of the transmitted picture
For now, look for how and with what to flash the microcontroller in the search engines, later I will create a topic on our FORUM. I did not make a printed circuit board, because. the schema is very simple. I advise you to buy a breadboard and solder everything on it, if anyone is going to do it ...
Firmware for ATMEGA8 microcontroller: RFmodulatorV1.
POST SCRIPTUM...
There is an inaccuracy in the diagram, the device has a TNF 0170U623R modulator from TENAS, which was also installed on the boards by the GS receiver. When he "picked" - he mixed up the modulator block. It is made on the MBS741T1AEF chip. The one shown in the diagram did not work for me. Commands for MBS741T1AEF apparently correspond to TA1297AFNG, the program was written exactly according to the TA1297AFNG datasheet.
Updated firmware with remembering the channel number when the channel number is disabled RFmodulatorV2.
And swap 3 and 4 on the modulator.
You can discuss this and other news on our
At the end of the twentieth century, satellite television quickly burst into our homes and began to improve just as rapidly. Not everyone remembers the first satellite receivers Soviet production from the company Krosna! It was a huge unit, on which only 8 channels could be tuned by rotating the wheels of variable resistors. But progress in this area has led to the fact that the equipment for receiving satellite television has become rapidly aging. The analog signal was replaced by a digital MPEG-2 standard, and now it is already living its last days, after the introduction of the MPEG-4 standard, which MPEG-2 receivers can no longer receive and decode ...
Naturally, in the hands of the population, as well as in landfills, analog as well as digital satellite receivers of early models began to rapidly accumulate. For ordinary people, this is just rubbish, but for us radio amateurs, it is a rather valuable source of parts, cases in which you can assemble some kind of device, connectors, power cords, transformers and ready-made power supplies.
And oddly enough, analog receivers may be of greater interest to radio amateurs, because they were assembled on full-sized components and, having not a small current consumption, had power supplies and decent power transformers. You can also profit from displays, high-frequency units and ordinary capacitors, resistances, transistors, diodes, etc. in them.
It all depends on what state the unit is in and what its configuration is, sometimes it can be used as a clock, a timer with an actuator, but some devices can be used in a more interesting way.
We are talking about tuners with a built-in positioner. The positioner is electronic device, designed to turn the satellite dish along the orbital axis to various satellites with memorizing their positions and then turning the dish to these positions by supplying a supply voltage of +/- 48 volts to the actuator. The actuator is a DC electric motor with a gearbox and a retractable stem. They come with a retractable part of various lengths: 8-12-18-24-32 inches and are quite powerful, for example, I know of cases when, on a jammed rotary mechanism, the motor bent the channel ten! There were also tuners with a dual positioner designed to orient the antenna in both the horizontal and vertical axes.
What is the main idea of this review: what can be learned from these devices and how can they be applied in case of preserved performance. If the tuner with a positioner has retained its functionality as a positioner (analogue), it can be used for its intended purpose as a positioner, as well as for opening doors, gates, orienting a solar panel, etc. If all the electronics are burned out and cannot be restored, but the transformer remains intact, a pair of transformer - motor can be used for the same processes, but with your electronic filling.
The article provided photographs of 2 old receivers and you yourself will evaluate their filling. One of them is an analog Mirage 2200 with a double positioner. I inserted a 3-position toggle switch into it so that I could supply power from it to the engine, without the participation of a positioner.
One author suggested the easiest way to do this. A satellite dish is used as the basis, because it is ideal in shape for focusing the sun's rays, formally it is designed to focus waves. In addition, such an antenna has an adjustable node, which allows you to change its angle if necessary and conveniently follow the sun.
This solar oven works very simply. When the sun's rays hit the plate, they are reflected from it and then focused at one point. As a result, the temperature rises sharply at this point, the principle is very similar to the operation of a lens.
Materials and tools for manufacturing:
- parabolic satellite dish;
- a board or timber to create a reliable foundation;
- saw for metal;
- wooden plank;
- mirror film;
- glue;
- scissors and other tools.
Solar oven manufacturing process:
Step one. Making a platform for the oven
In order for the stove to stand securely on the ground and at the same time hold the pot, you need to make a good support for it. A board is suitable for these purposes, but it is better to use a beam, as it is heavier. The platform must be made as wide as possible, then the stove will be more stable and will not tip over even with a strong gust of wind. You need to cut off two pieces of the board and then screw the antenna to it with self-tapping screws as shown in the photo.
Step two. We lengthen the gander
The thing is that the dish is designed to focus waves in the region of the LNB heads, that is, this is too small a distance to focus the rays on the bowler hat. In this regard, the gander needs to be slightly lengthened. For these purposes, a wooden block is used. It needs to be sharpened at one end, and then driven into the antenna pipe. At the end of the gander, you need to hammer in a hook, a bowler hat will be hung on it. Instead of a hook on the gander, you can make cuts into which the bowler handle will simply be inserted. Thus, the distance to the bowler from the antenna web can be adjusted if necessary.
Step three. Create a reflective surface
In order for the sun's rays to bounce off the antenna, its surface must be made mirrored. For these purposes, you can use foil, mirror film or small pieces of mirror. It is important to understand here that the efficiency of the furnace will directly depend on the quality of the materials used. The better the material will reflect the sun's rays, the higher the temperature at the focused point will be.
Step four. Final Assembly and Inspection of the Furnace
Now the oven can be assembled and tested in practice. It must be turned towards the sun in such a way that the focused rays fall directly on the bowler hat. You may have to experiment with the distance from the antenna web to the bowler hat. The better the beam is focused, the higher the temperature will be.
There are several tricks to improve the efficiency of such a furnace. Firstly, the bowler hat must be black, since if it reflects the color of the sun, the efficiency of such a device will be low. Secondly, the pot can be placed in a heat-resistant bag, as a result, a greenhouse effect will form in the bag and the efficiency of the furnace will increase significantly.
The disadvantage of such a stove is that it needs to be turned every half hour to follow the sun. In addition, there is a risk of getting burned if accidentally exposed to focused sunlight. It is very dangerous to get such a source of energy into the eyes.
According to the author, the temperature at the focal point reaches several hundred degrees. So, for example, a stove easily ignites a wooden block, and this requires about 300 degrees. In the photo you can see how a newspaper caught fire from a beam of light, and all this after 15 seconds, although the temperature outside was only +18 degrees.
It is necessary to work with such furnaces in sunglasses, as there is a risk of burning the cornea of \u200b\u200bthe eye due to glare.