- How did spies use Morse code?
- What does the number of a radio station mean?
- How can I make my own FM radio station?
- HOW FAR CAN AM radio transmissions travel?
- What is the most popular radio station in the world?
- What are the FM radio frequencies?
- Is MHz the same as FM?
- Does anyone still use shortwave?
- What can I hear on shortwave radio?
- Why are radio stations only odd numbers?
- Why did AM radio die out?
- Do numbers stations still exist?
- What is the lowest FM channel?
- How many FM channels are there in air?
- What does K and W stand for?
How did spies use Morse code?
Spies Used Morse Code: They use voice “numbers stations” and something called a “one time pad”.
If viva Fidel and the boys told them they had to learn CW when “hams” don’t have to any longer they probably would have “found another hobby”..
What does the number of a radio station 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.
How can I make my own FM radio station?
The same principles apply: use the tiny computer to create and broadcast the signal, and attach an antenna to give it the broadcast range.Set up your Raspberry Pi. … Install the FM radio software. … Choose some music. … Add an antenna. … Broadcast. … Tune your radio and enjoy.
HOW FAR CAN AM radio transmissions travel?
about 100 milesUseful daytime AM service is generally limited to a radius of no more than about 100 miles (162 km), even for the most powerful stations. However, during nighttime hours the AM signals can travel over hundreds of miles by reflection from the ionosphere, a phenomenon called “skywave” propagation.
What is the most popular radio station in the world?
Top 10 most popular radio station in the worldKEXP.Spectrum Radio. … Soma FM. … Jango. … WFMU. … Global Radio. … Star 94 Atlanta. … BBC Radio 1. BBC Radio 1 is a British radio station operated by the British Broadcasting Corporationwhich also broadcasts internationally, specialising in current popular music and chart hits throughout the day. … More items…•
What are the FM radio frequencies?
Throughout the world, the FM broadcast band falls within the VHF part of the radio spectrum. Usually 87.5 to 108.0 MHz is used, or some portion thereof, with few exceptions: In the former Soviet republics, and some former Eastern Bloc countries, the older 65.8–74 MHz band is also used.
Is MHz the same as FM?
An EM signal of 100 MHz is near the middle of the standard frequency-modulation (FM) radio broadcast band, and has a wavelength of 3 meters, which is a little less than 10 feet. Some radio transmissions are made at frequencies up to many thousands of megahertz.
Does anyone still use shortwave?
Because, whether we like it or not, there are several remote places in this vast world, many of which still depend on shortwave broadcasting. … Shortwave is used not just by international radio stations or radio amateurs but is also essential for aviation, marine, diplomatic and emergency purposes.
What can I hear on shortwave radio?
Specialized interests of shortwave listeners may include listening for shortwave utility, or “ute”, transmissions such as shipping, sailing, naval, aviation, or military signals, listening for intelligence signals (numbers stations), or tuning in amateur radio stations.
Why are radio stations only 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 did AM radio die out?
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.
Do numbers stations still exist?
Experts are confident that numbers stations do still exist, even if there are fewer of them. “In the same way spy tricks such as pretending to feed ducks around a pond might still exist, numbers stations still exist too,” says Al Bolton, a radio amateur.
What is the lowest FM channel?
channel 200The lowest and almost-unused channel, channel 200, extends from 87.8 MHz to 88.0 MHz; thus its center frequency is 87.9 MHz. Channel 201 has a center frequency of 88.1 MHz, and so on, up to channel 300, which extends from 107.8 to 108.0 MHz and has a center frequency of 107.9 MHz.
How many FM channels are there in air?
18 FMAIR operates at present 18 FM stereo channels, called AIR FM Rainbow, targeting the urban audience in a refreshing style of presentation. Four more FM channels called, AIR FM Gold, broadcast composite news and entertainment programmes from Delhi, Kolkata, Chennai and Mumbai.
What does K and W stand for?
Knight and WilsonThe Carolinian Coffee Shop was owned by brothers Thomas, Kenneth and William Wilson and their brother-in-law T.K. Knight. In 1937, the initials K&W (for Knight and Wilson) were adopted and K&W Restaurant was established.