Simple TV aerial
This is a very simple and effective antenna for receiving digital and analog television. Suitable for use both at home and outdoors. The antenna is a "bi-square" (double square) - it's the most simple and popular design for repetition. To build an antenna, you need a little:Next, we straighten the wire with our hands, making it even without the waves that formed after winding from the coil. We measure four sections of 10.5 cm on this wire in a row.Then we double the double square. The wire is thick and bends with difficulty, and this is good - it will not bend from accidental impacts.Extra wire bite off,leaving an allowance of approximately a centimeter to solder a closed loop.We clean the connection points and future soldering.Solder the contour with flux. It is better to use a soldering iron more powerful, since it is difficult to heat a thick copper wire.We clean the TV cable and solder to the antenna as in the photo.In principle, the antenna is ready for use. I will not stop at this and I will make a body for the central part. That's what I need.Since the round box is too deep, I will cut exactly half of it with a hacksaw.Then I melt the grooves for the antenna with a soldering iron.This can be done with the same hacksaw.I use glue to connect the wires to the case and the soldering point.Everything is ready. I'll hang the antenna over the window on the nail.Pick the connector on the second end of the cable and plug it into the TV socket. In the antenna jack of course.I’ll launch automatic channel search.
- - Coaxial cable.
- - TV connector.
- - Copper wire about a meter long, 2-4 mm in diameter. Any, even steel, is suitable.
- - Solder flux.
- - Plastic round junction box for the housing. Or any other.
Making an antenna for receiving digital television (DVB-T)I will make an antenna for receiving digital television channels. To begin production, first you need to calculate the size of the future antenna. And to calculate the size you need to know the middle range of the reception of digital channels. The average frequency is approximately equal to - 690 MHz.If you want to make an antenna for analog channels, then take, say - 470 MHz for the DMV, etc. (ranges of TV channels you can look HERE) Next, go here - ANTENNA CALCULATION Enter the frequency and press "CALCULATE" and see what is L1. L1 is the shoulder of the square for the antenna. In my case, for a frequency of 690 MHz, it is early about 105 mm. The required number has been found, nothing more is needed. Now we proceed directly to the construction of the bi-square antenna. We measure about 90 cm of thick copper wire and bite off either with pliers or with pliers.
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