Radio Tubes

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$149.00
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$300.00
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$750.00
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$69.00
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$69.00
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$79.00
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Radio Tubes

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Vacuum Tube: How Does It Work? (Part 1)

How Does A Power Car Radio Antenna Work

Antenna is very essential for a radio. The air surrounding us in very silent. The activities that are electromagnetic cannot be captured by the ears of normal human being. All the waves including the one from TV, radio, communication through wireless and even transmissions of the internet are in this environment where we all live, sleep and eat. The human body is not affected by this kind of electromagnetic waves. And hence it does not have the capability to sense its travel. So it is very essential to use a device that could capture all these signals. But how do auto radio antennas work?

But what exactly is known by a radio antenna. A device which is is used for capturing this waves which wander the air surrounding us is known as an Antenna. An antenna has a tubular structure which is generally made up of stainless steel. Most of these antennas are generally telescopic. They can change their length and height as they wish. Longer antennas and lower frequency broad casts are required for transmission of AM radio.

We must realize that the atmosphere around us carries many waves. It carries the waves which are being transmitted. These are detected by a component in the radio. It is called antenna. It is made up of steel of stainless steel type. It is a tubular structure generally thin. They can be extended or reduced in length.

There is a major classification in this. Amplitude modulation and frequency modulation. The broadcast of AM signals happen at shorter frequencies and broadcast of FM signals happen at a higher frequency range. Only antennas that are long can pick up lower frequency signal and only antennas that are short are capable of broadcast of FM signals that happen at a higher frequency.

The antennas have good reception and detection capabilities. When you adjust the station in your radio, it detects the signal available in that frequency. At one point the reception is maximum. At that point the signal is clear.

There are lot of differences between an ordinary radio antenna and radio antenna of car because the car is not stationary. A heavy wire should be connected that runs through the body of the car that remains shielded. We may have doubt why shielding should be done. This is done to prevent interference of external waves. These external wave can be anything right from cell phone or even various power lines in the road. Only when this interference is stopped there can be smooth flow of radio waves to tuner from the antenna of the radio in the car.

Nowadays technology has become so advanced technology like presence of gears in the tubes of the antenna. These tubes are operated by means of a motor. This is to receive the signal by the antennas when the radio is being switched on. There are other differences also between stationary radio antenna and that of a radio antenna of a car that is moving because the steel used in construction of antenna in car is more stronger and rigid. Some vehicles are also trying to use the same technology used in mobile phone for transmission of radio wave signals. However this is still in experimentation stage only.

The article how do auto radio antennas work would have given you basic ideas on the types and working of antennas. The discovery of such new things not only makes our life simple, but also makes us realize that man can do wonders with his small brain. The creation will result only after a series of failures. It is the combined effort of the mind and the brain which makes people work on new things.

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