Arrl Satellite

Ham radio has a long and important history. As society and technology continue to move on to new things, a small segment continues to enjoy the hobby as well as to educate and help during disasters.

WHAT IS HAM RADIO?

Ham radio is the the term coined for amateur radio enthusiasts who learn to operate radios as a hobby or for practical use. Hams – as operators are called – can use various methods for transmitting messages including Morse code via telegraph, voice transmission via radio or messages through a computer. New methods of transmitting television allow for images to be received around the world by hams. Some hams have contributed to the development of new technologies for other uses.

The term ‘ham’ has unknown origin although there are several theories.

WHO USES HAM RADIO?

Ham radio operators can be anyone – doctors, homemakers, truck drivers – who enjoys communicating with new friends. Hams can talk across town or around the world.

Ham radio was used by the military in the World Wars and by ships. The well known ‘SOS’ is just one of the codes that operators use to relay messages to one another.

In emergencies ham radio operators volunteer to assist with transmitting messages when normal communications are unavailable.

So far, we’ve uncovered some interesting facts about ham radio. You may decide that the following information is even more interesting.

Hams are all over the world – even in space! While in orbit or on the space station astronauts have spoken with other operators as well as children, teachers and parents. The program is called ARISS, Amateur Radio on the International Space Station.

Hams are young and old, men and women and of every background and occupation.

WHAT DO YOU NEED TO START?

In the United States you must obtain a license from the FCC (Federal Communications Commission).

To be licensed by the FCC you must pass an exam. The exam is administered by a volunteer ham operator and you are then mailed your license. You can often find websites or groups where you can locate a tutor who will answer questions or offer instruction before you take your exam. One such resource is the ARRL website. The ARRL is the National Association for Amateur Radio and provides training and resources for getting started as well as updates and news for the ham radio community.

HOW MANY HAMS ARE THERE?

The ARRL site claims over 170,000 members. FCC licenses have been issued to over 600,000 individuals in the United States and there are over 3,000,000 hams in Japan and many more throughout the world according to statistics found at ah0a-Site.

With so many people to talk to, there are even competitions to see how far away you can transmit and many other events within the community.

The day will come when you can use something you read about here to have a beneficial impact. Then you’ll be glad you took the time to learn more about ham radio.

About the Author:

Michael Hehn writes articles about various topics.
Find out what he has to say about communications at Communications

Article Source: ArticlesBase.com – Ham Radio – Passion for Communication

The Arrl Satellite Anthology Publication no. 87 of the Radio amateur 0872594645 $7.27

The ARRL Satellite Anthology by Rich Roznoy and American Radio Relay League… $24.95

The Arrl Satellite Handbook $30.22

ARRL SATELLITE HBK OSCAR AMSAT ANTENNA RADIO RECEIVER $22.00

The Arrl Satellite Handbook: Understanding Practical An $49.19

The Arrl Satellite Handbook, Steve Ford, Acceptable Boo $17.83

The Satellite Experimenter’s Handbook (ARRL Publication $13.95

I want something on introduct Wine Thermometer (JWW). * The wine thermometer style is delicate and can be easily inserted in a bottle of wine for temperature measurement * Not only can help people to find a suitable temperature for drinking, but also create some fun platinum * Nominal range: (0-30/0-40) C * Scale division: 1C * Filled fluids * Overall length: 130mm * Material above decoration: brass (chrome
(Redirected from 2 meters)
The 2 meter band amateur radio is a portion of the radio spectrum VHF, including frequencies ranging from 144.000 MHz to 148.000 MHz in ITU Regions 2 (North and South America plus Hawaii) and 3 (Asia and Oceania) and 144.000 to 146.000 MHz in ITU Region 1 (Europe, Africa and Russia). The privileges of the license amateur radio operators include the use of frequencies in this band for telecommunications, usually conducted locally within a range of approximately 100 miles (160km).
They operate on 2 meters
Because it is local and reliable, and because the requirements license to transmit in the band 2-meter are easily fulfilled in many parts of the world, this band is one of the most popular non-HF ham bands. This popularity, Compact size of the radios and antennas required and the ability of this band to provide reliable communications easy local also means that it is also the band more used to the efforts of local emergency communications, such as providing communications between Red Cross shelters and local authorities. In the U.S., the role of emergency communications is aided by the fact that apparently all amateur radio operators is 2 meters mobile radio or walkie-talkie.
Great part of the operation of FM 2 meter uses a radio repeater, a receiver and radio transmitter immediately retransmits a signal on a longer distance. However, even without repeaters available, provides reliable communication in Crosstown smaller towns and that makes it ideal for emergency communications. Radios simple for FM repeater operation have become plentiful and inexpensive in recent years. A fully functional FM transceiver and antenna can be obtained under 200 new U.S. $ much less for modern use.
DX
While 2 meters is better known as a local band, there are many opportunities for long distance (DX) communications. Occasionally, bending in the atmosphere's troposphere (ducting) can allow 2-meter signals to carry hundreds of kilometers. This is called a lift.
In rare cases, spread of sporadic E contacts can bring more than 1,000 miles (1,600 km). 2 meters is also used in conjunction with 70cm (Mode B or V / U) in some amateur radio satellites, giving distances up to about 3,000 miles (4,800 km) with a LEO satellite.

A set of 2 long Yagi antennas for 2 meter band fed in phase and gain more narrow main lobe of radiation (WA6PY)
By speeding up the code Morse using an audio recorder, or using a computer, very short bursts of signal can be bounced off the trail of ionized gas of meteor showers that allows DX. This is often called burst transmission.
Another phenomenon that produces the ionization of the upper atmosphere suitable for 2M DX aurora. Since the ionization persists more than meteor trails, regular audio signals can be used, but the constant motion of ionized gas leads to heavy distortion of signals which cause sound audio phantom and quietly.
To communicate over the longest distances Moonbounce hams use. This high power antennae well to reflect VHF signals off the moon. The VHF signals are usually beyond the Earth's atmosphere, so using the moon as a target is very handy. Due to the delay of the signal traveling to the moon and back, a person can hear the final broadcast of its own transmission back.
Links to sites spread 2m
DX-Sherlock real time propagation maps 2m
DX-Sherlock real-time VHF propagation and even ticker
References
^ U.S. Amateur Radio Frequency Appropriations. Http: / / www.arrl.org / Reply / field / regulations / allocate.html accessed 12 May 2008.
^ RSGB band plan in the UK. Http: / / www.rsgb.org / spectrumforum / bandplans / RSGB Band Plan or master.pdf http://www.rsgb-spectrumforum.org.uk/Papers/RSGB Band Plan master.htm Accessed on 14 May 2008.
^ Spectrum sharing with other amateur radio services a reality. The ARRL Letter, Vol. 20, No. 2. href = "http://www.arrl.org/arrlletter/01/1102/"> Http: / / www.arrl.org/arrlletter/01/1102/ Accessed on 14 May 2008.
^ href = "# http://www.rsgb.org/getlicence/ foundation"> # Http: / / www.rsgb.org/getlicence/ foundation RSGB Guide Licensing
^ target = "_blank" href = "http://www.rsgb.org/emergency/"> Http: / / www.rsgb.org/emergency/ RSGB emergency radio public service and community website
Very high frequency (VHF) and ultrahigh frequency (UHF) amateur radio bands
VHF
UHF

6 m
4 m
2 m
1.25 m
70 cm
33 cm
23 cm
13 cm
50 MHz
70 MHz
144 MHz
219,220 MHz
420 MHz
902 MHz
1.24 GHz
2.32.31 GHz
54 MHz
70.5 MHz
148 MHz
222,225 MHz
450 MHz
928 MHz
1.3 GHz
2.392.45 GHz
Categories: Amateur radio bands (and so on) For more information, please visit some products on the instrument protecction health, virtual digital multimeter. Wine Thermometer (JWW) Products are more here!

About the Author:

himfr can provide you most popular hot products from china!

Article Source: ArticlesBase.com – 2-meter band