These two wires connect to the same stuff suggesting that they receive same type of signal. Whe, then, do they are kept separate ?
2006-06-18 18:27:38 · 4 answers · asked by Smiling_Umesh 3 in Science & Mathematics ➔ Other - Science
Has to do with the idea of the basic TV antenna. It is known as a dipole. In fact, a rabbit ear antenna is a dipole (two pole) antenna, but is normally set up as a "V". The two poles (at any point in time) each pick up 1/2 of the signal wave and add them together at the input of the tuner via a coil that has one end hooked to one arm and the other end to the other arm. That is why the two wires. The signal is then "transformer" coupled in to the front end of the TV tuner. For more "gain" several arms of different lengths are hooked together and fed via the two wires to the input coil or transformer. That is called a "beam" or "hi gain" antenna. Today we have cable, but we still have the two wires. Now it is a concentric or so called "coaxial" cable that goes to the input coil.
2006-06-18 18:57:05 · answer #1 · answered by Dusty 7 · 2⤊ 0⤋
Coaxial TV cable is in fact a waves guide.
The middle wire carries the necessary signal for TV and the outer one is a shield wich keeps out magnetic and electromagnetic fields (which exists anywhere) to interact with the signal carried out by the middle wire.
So, the middle wire carries the necessary signal and the outer one provides shield.
2006-06-18 18:57:54 · answer #2 · answered by Remesh M 1 · 0⤊ 0⤋
What would you do if they had 5 or 6 more wires?
2006-06-18 18:31:00 · answer #3 · answered by Oriental Delight 5 · 0⤊ 0⤋
Most people call it "(cable) TV transformer" or "75 to 300 ohm transformer". The correct name for it is "4:1 balun", but this term is rarely, if ever, used by the general public.
2016-05-20 01:35:36 · answer #4 · answered by Anonymous · 0⤊ 0⤋