How Do Radio Stations Get Their Numbers?

What do the numbers in radio stations mean?

The numbers on your radio dial represent frequencies used by your local radio stations.

If the FM dial is set at 89, the radio signal you hear is broadcasted at 89 MegaHertz (MHz), or 89,000,000 cycles per second..

Why is AM radio so bad?

AM stands for Amplitude Modulation and has poorer sound quality compared with FM, but it is cheaper to transmit and can be sent over long distances — especially at night. The lower frequencies of the band we use for AM signals creates a wavelength that is extremely large.

Is shortwave dead?

Several shortwave radio stations across the world have been shutting down lately. The British Broadcasting Corporation (BBC) recently ended the BBC Tamil shortwave service.

How do radio stations get their call letters?

The letters ‘N’ and ‘A’ were given to military stations, but ‘K’ and ‘W’ were assigned out for commercial use. Radio stations east of the Mississippi River had to start their stations with ‘W’, and stations west of the Mississippi with ‘K’.

How do I find out how many listeners a radio station has?

To see roughly how many people are listening to the number one station in an entire week, multiply the “one second” number by 10. For example, for Casper WY the number one station has 635 people listening in one second, so it has 6,350 people listening in one week.

Why do some radio stations have 3 call letters?

THREE LETTER CALLS Radio and television station identification – expressed in a series of three or four letters of the alphabet – goes back to the days of the telegraphy when operators keyed a few characters to identify themselves when contacting or “calling” each other.

Why is AM radio not used?

The decline in AM audio was due more to regulation than to method of modulation. One aspect of radio not understood by most listeners is the concept of occupied bandwidth, or the amount of spectrum that a station uses to transmit its signal.

What is the most powerful AM radio station in America?

List of 50 kW AM radio stations in the United StatesCall signFrequencyPowerKDKA1020 kHz50 kW UKDFD760 kHz50 kW-D, 1 kW-N, DA2 (Class B)KDRI830 kHz50 kW-D, 1 kW-N, DA2 (Class B)KDUN1030 kHz50 kW-D, 0.63 kW (630 watts)-N (Class B)116 more rows

Why do FM stations end in odd numbers?

FM radio stations end in odd numbers to prevent interference. The reason they are odd numbers rather than even numbers is that 1 (odd number) is the first number we start counting from, not 0 (even number). FM radio stations in the U.S. transmit in bands between 88.0 megahertz (MHz) and 108.0 MHz.

Why does AM radio not work at night?

Most AM radio stations are required by the FCC’s rules to reduce their power or cease operating at night in order to avoid interference to other AM stations. … However, during nighttime hours the AM signals can travel over hundreds of miles by reflection from the ionosphere, a phenomenon called “skywave” propagation.

Are Numbers Stations real?

Sometimes they are read live, sometimes in Morse code, and sometimes by means of digital noise transmission. These are the so-called numbers stations. Numbers stations have been in existence since World War I. Over the years they have attracted sporadic interest from journalists, video game designers, and filmmakers.

Is AM or FM Better?

With AM radio, the amplitude, or overall strength, of the signal is varied to incorporate the sound information. With FM, the frequency (the number of times each second that the current changes direction) of the carrier signal is varied. FM signals have a great advantage over AM signals.

Is AM radio dead?

AM is dying for a lack of listeners. Only 10 to 20 % of all radio listeners listen to it, and that depends upon the locale. … Then there is digital radio, although this is not a popular option. The U.S. version (called HD Radio) is available on both the AM and FM bands, but few receive it.

Why do pilots use call signs?

“The first call signs were likely used by ground controllers to communicate with pilots, as pilot-to-pilot radio wasn’t efficient at that time,” she said. “It was faster and easier to call a pilot by his nickname, and it would have confused the enemy in case they were listening.”

Why does AM radio exist?

One reason AM broadcast is still around it is used mostly for talk radio. There are a few FM talk radio stations, most are on AM. Talk radio does not require the quality of audio that FM can provide with music, so many AM stations went with talk radio. … So many AM stations remain on because of this.

Why are numbers stations creepy?

There is a small community of aficionados who believe messages like this are a throwback to the era of Cold War espionage. They are the mysterious “numbers stations”. … Encountering these shortwave radio messages, many radio hams concluded that they were being used to send coded messages across extremely long distances.

Are old radios dangerous?

You should be very wary of all unrestored old electrical devices such as kitchen appliances, fans, signs, and radios. Cords become frayed with age, insulation breaks down on various parts and switches wear out. … Antique Radios may also contain hazardous substances, see Antique Radios and Asbestos.

What is a tactical call sign?

tactical call sign (plural tactical call signs) (military) A call sign that identifies a tactical command or tactical communication facility.