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HAM RADIO

HAM RADIO. HAM? WHAT IS IT?. The pioneer of the HAM were three scientists. H :HERTZ A :ARMSTRONG M :MARCONI. HERTZ : DEMONSTRATE EXISTANCE OF ELECTRO MAGNETIC WAVES ARM STRONG : DEVELOP RESONANT FREQUENCY OSCILLATORS FOR RADIO FREQUENCY MARCONI:ESTABLISH FIRST RADIO CONTACT.

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HAM RADIO

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  1. HAM RADIO

  2. HAM? WHAT IS IT? The pioneer of the HAM were three scientists. • H :HERTZ • A :ARMSTRONG • M :MARCONI

  3. HERTZ : DEMONSTRATE EXISTANCE OF ELECTRO MAGNETIC WAVES • ARM STRONG : DEVELOP RESONANT FREQUENCY OSCILLATORS FOR RADIO FREQUENCY • MARCONI:ESTABLISH FIRST RADIO CONTACT

  4. HAM RADIO IS ALSO KNOWN AS AMATEUR RADIO

  5. What is the difference between HAM radio and ordinary radio? Amateur radio operators are often called "Ham Radio operators" or simply "Hams". Hams are not allowed to do anything with their radios that earns them money in any way.  Ham radio operators cannot 'broadcast' to the public.

  6. RADIO TELEGRAPHY • The International Morse codes: A ._ J._ _ _ S… 1._ _ _ _ B _... K_._ T_ 2.._ _ _ C _._. L._.. U.._ 3…_ _ D_.. M_ _ V…_ 4…._ E. N_. W._ _ 5….. F .._. O_ _ _ X_.._ 6_.... G _ _ . P._ _. Y_._ _ 7_ _... H …. Q_ _._ Z_ _.. 8_ _ _.. I .. R ._ . 9_ _ _ _. 0_ _ _ _ _

  7. USE OF MORSE CODES • The use of Morse codes at the worst condition of weather when voice is not heard properly. • It is sending as …. • .( dot) and _ (dash) form by Morse keys.

  8. CALL SIGN • Call sign is an identification of a station issued by authority. The first part of the call-sign is known as prefix which indicates the country of the license and last part is called suffix .

  9. Example of call sine • For example one call sign is given below: • VU3HHP : VU3 indicates prefix and HHP indicates suffix. • Some important country’s call- sign • India : VU Japan : JA-JS • Sri lanka : 4S Germany : DA-DR • Canada : VE Italy : I • Pakistan : AP Australia : VK • America : K,W,N England :G • Russia : UA-UZ South africa : ZS

  10. What Hams Do? •  Whether one would like to chat with friends to discuss topics of a mutual interest, or volunteer for emergency services •  Talking with friends within the local community using a hand-held transceiver on VHF or talk internationally using HF radio transmitters.

  11. What do you mean by 'Amateur Radio Service'? • 'Amateur Radio Service' is a two-way radio communication service available to persons who are licensed by the communication authority to carry out experimentation in the field of radio communication techniques. The Indian Wireless Telegraphs (Amateur Service) Rules 1978 defines 'Amateur Service' as "a service of self training, inter-communication and technical investigations carried on by amateurs that is, by persons duly authorized under these rules interested in radio technique solely with a personal aim and without pecuniary interest".

  12. Frequency requirements Short wave/High frequencies (HF) 1.820 – 30.000 MHz • VHF (Very High Frequencies) • 144-146 MHz

  13. Radio telegraphy operating procedure • In radio telegraphy contact using Morse Code is still used very affectionately by thousands of ham radio operators. They make conversation as fluently as they do in voice using Morse code.

  14. The instruments used for Communication • HF(1.8MHz to 30MHz)Tranceiver • VHF(144 to 146 MHz) Transceiver • Depends on sensitivity of the receivers, it will work accurately. • Half wave dipole antenna mount on the top of the roof for maximum signal to noise ratio • The transmission done through Ionosphere

  15. SSB TRANSMITTER

  16. SUPER HETERODYNE RECEIVER

  17. The Role of Ionosphere in Radio Wave Propagation • Long distance propagation of radio waves depends on an invisible layer of charged particles, which envelops the Earth. This layer of charged particles known as the ionosphere has been in existence for millions of years.

  18. HAM RADIO PARADISE LIKE PARADISE • Propagation • Attenuation • Radiation • Amplification • Detection • Interference • Sensitive • Efficient

  19. Q CODES • The Q codes consists of three letters starting with the letter ‘Q’. • Q codes are facilitate faster communication in Morse code. • Instead of sending a long sentence, the amateur radio operator can just send a combination of three letters to represent a long sentence.

  20. Examples of some Q codes • QRA? : What is the name of your station? • QRH? : Does my frequency vary? • QRL? : Are you busy? • QTH? : What is your position in latitude and longitude?

  21. Phonetics used by amateur radio operators • If we listen to a two way amateur wireless conversation for the first time in our life, we could come across certain words , which perhaps never heard before! • It is also useful when calling distant station or the band is crowded.

  22. Examples of Phonetics • A : ALPHA K: KILO • B : BRAVO L : LIMA • C : CHARLIE M : MIKE • D : DELTA N: NOVEMBER • E: ECHO O : OSCAR • F : FOXTROT P : PAPA • G : GOLF Q : QUEBEC • H : HOTEL R : ROMEO • I : INDIA S : SIERRA • J: JULIET T : TANGO

  23. Examples of Phonetics • U : UNIFORM • V : VICTOR • W : WHISKEY • X : X-RAY • Y : YANKEE • Z : ZULU • FOR THE CALL SIGN :VU3HHP , IT IS :VICTOR UNIFORM THREE HOTEL HOTEL PAPA

  24. PHOTO OF INSTRUMENT

  25. CONCLUSION • HAM RADIO IS JUST A HOBBY TO MAKE CONVERSATION FOR A LONG TIME . • IT IS ALSO USEFUL TO SAVE LIVES AT THE TIME OF DISASTER PROBLEMS.

  26. REFERENCES • A HAND BOOK BY GUJARAT INSTITUTE OF AMATEUR RADIO

  27. THANK YOU

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