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HAM RADIO A.Rishikesh [ECE] G.Pullaiah College of Engineering and Technology.

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1 Introduction 2 Activities and practices 3 Licensing 4 Applications 5 Conclusion 6 References Contents

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Introduction Ham radio is for anyone who likes to communicate with others via wireless technology. Amateur radio is a worldwide group of people who communicate with each other over a wide frequency spectrum using many different types of wireless transmitting modes.

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Introduction Amateur radio operators are often called ham radio operators or simply "hams". Amateur (HAM) Radio is truly a hobby but often one that makes a difference especially in emergency or disaster situations. Amateurs talk to local friends over the radio waves using a hand-held transceiver, communicating digitally with packet radio.

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Activities and practices Amateur radio operators use various modes of transmission to communicate. Voice transmissions are most common. Frequency modulation (FM) offering high quality audio. Single sideband (SSB) offering more reliable communications.

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Activities and practices Non-hams can " listen in " via their own receivers or radio scanners Many ham bands are found in the frequency range that goes from above the AM radio band (1.6 MHz) to just above the citizens band (27 MHz). During daylight, 15 to 27 MHz is a good band for long-distance communications.

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Activities and practices At night, the band from 1.6 to 15 MHz is good for long-distance communications. These bands are often referred to historically as short-wave bands (as in "short-wave radio"). Some ham radio operators use the very reliable Morse code , while others use voice . Morse code signals (beeps) often get through when voice transmissions cannot. There are also very many digital modes.

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Activities and practices Hams, on the other hand, conduct two-way conversations , often with another ham or with a group of hams in an informal roundtable . Hams also participate in networks, often called nets , at predetermined times and frequencies to exchange third-party messages. In the case of disasters, hams exchange health and welfare information with other hams.

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Activities and practices Some hams use radioteletype, (RTTY) with computer screens replacing the noisy teletype machines of the past.

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Activities and practices When deadly floods struck central and southern Texas in mid-October 1998, amateur radio operators from four states volunteered their time. Susan Manor, NF0T, is shown helping with communications at the New Braunfels Red Cross office.

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Licensing License tests cover electronics theory and amateur radio rules and regulations. There is no age restriction. Each country has its own licensing arrangements. Many countries share many of the same frequency bands with hams in the United States. Each license class allows operation in certain bands. The higher the class of license, the more allowable frequency bands that are available for use.

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Licensing Who issues Amateur Radio License in India? Every licensed Radio Amateur is given a call sign that is used to identify you and your location of license. Each country that has Amateur Radio status is allocated a range of call signs by the International Telecommunications Union (ITU). Amateur Radio License in India are licensed by the Wireless Planning & Coordination wing of Ministry of Communications, Govt. of India.

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Licensing Call sign structure as prescribed by the ITU, consists of three parts which break down as follows, using the call sign ZS1NAT as an example: ZS – Shows the country from which the call sign originates and may also indicate the license class. 1 – Gives the subdivision of the country or territory indicated in the first part (this one refers to the Western Cape). NAT – The final part is unique to the holder of the license, identifying that person specifically.

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Licensing With these privileges come responsibilities and rules for the operation of an amateur radio station. Specifically, there are a few things that hams are not allowed to do: Hams are not allowed to do anything with their radios that makes them money in way. Ham radio is a hobby. Ham radio operator cannot `broadcast' to the public.

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Applications While many hams simply enjoy talking to friends, others pursue a wide variety of specialized interests. Amateur Radio Direction Finding. Amateur radio emergency communications. Communicating via amateur satellites. VHF, UHF and microwave operation on amateur radio high bands .

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Conclusion What is the benefit for the Students by Joining Amateur Hobby: He/ She is introduced to the Scientific activity at a very young age. He/ She will possess a license from the Ministry of Communications, Government of India. He/ She joins the fraternity and interact with other Students, Teachers, Scientists, Doctors, Lawyers, Politicians, Kings and Prime Ministers from all over the World. He/ She can take part or share information on the latest developments in various technologies.

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References www.howstuffworks.com Ministry Website: Wireless Planning & Coordination Wing .

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