Shri Jagdish Chandra Bose :

Father of wireless communication

In 1895 Shri J.C. Bose gave his first public demonstration of wireless electromagnetic waves at Presidency collage in Kolkata he sent wireless signals with the help of remote control instruments developed and constructed by himself. He also transmitted wireless signals to a one mile distance.

In 1897 Bose demonstrated wireless signals to scientists at the Royal Society of Science in London. At this demo Marconi was present. He used the wavelenght of 12.5MM & 5MM. The first wireless signaling experiment by Marconi on Salisbury Plain in England was done in may 1897. Popov in Russia was still working on basics of remote signaling in 1897. Bose developed "iron-mercury-iron coherer" the sensitive telephone detector in 1898 for his detailed experiment in wireless communication. The report about this was published in the proceedings of the Royal Society dated 27th. April,1899. Marconi used this details of mercury coherer in his transatlantic communication from Newfoundland on 12th. December,1901. Marconi also used the sensitive semiconductor device invented by Bose.

Shri J.C. Bose described at the Royal Institute in London, his research work on millimeter wavelengths. He used waveguide, horn antennas, dielectric lenses, polarizers and semiconductors of which some equipments are still exhibited at the Bose Institute at Kolkata. Some of his ideas and concepts from 1897 are incorporated in 1.3MM multi beam receiveron NARO12meter telescope at TUSCAN, Arizona in USA. Sir Neville Mott, Noble laureate in 1977 remarked "Bose was at least 60 years ahead of his time & anticipated use of P-type & N-type semiconductors.

Thanks to VU2DSI, OM Dattaji, OM Arasuji & Ham Radio News

The thrill of wireless :

"Wireless is a thrilling pastime. Fancy a boy sitting in his room at home with his fingers on a telegraph key and a telephone receiver to his ear listening-in to the news of the world as it is flashed out from the great coast stations or by ships far out at sea! It's a great experience. Yet thousands of boys are doing this wonderful thing every day and night of the year, and you, my young friend, can do it as easily as they, for any boy can own a real wireless station, if he really wants to."

A. Frederick Collins, The Book of Wireless, 1915.

My article on HAM RADIO NEWS :

(Jan - Mar 2008)

My very first QSO (vhf) :

Use the following widget to listen to my audio file.

FileFactory.com

My first DX QSO :

I want to share my first DX QSO contact. On 9th.Oct 2006 it was on SSB and the band was 20m, the time was 19.11 IST and the frequency was 14.245. Pumping out 80 watts of power through inverted vee. DX station was AH2J, OM Akira from Gaum Island. I was copying him 59+ blasting signals and in return I got signal report as 53. I managed to complete and from the one got addicted to this most wonderful hobby.

Even if you are new to the hobby, you can work DX almost as easily as a seasoned HAM. Pick the right frequency bands at the right time of day (or night) and the DX stations will be there - ready to rag chew.

Be courteous and fair to all hams on frequency, using good operating procedures is every bit as important as logging that DX.

What Is Ham Radio All About?

Ham radio is many different things to many different people. But even if you already have some idea already of what it's about, you may not have the "big picture." That's because ham radio is actually several different hobbies folded into one.
There's the "talking with people in faraway places" hobby; the "keep me company while I'm commuting" hobby; the "put your computer on the air" hobby; the "public service and emergency communications" hobby; the television hobby, the satellite hobby and so on. What all of these hobbies-within-a-hobby share is that, for all of its technical trappings, ham radio is basically about people -- people using technology to make contact with other people. One other basic: it's a LOT of fun!

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Why Do They Call Themselves "Hams?"

You'll hear lots of stories about why amateur radio operators are called "hams," but there is no proof for any of the competing claims, and the simple truth is that no one knows for sure. What we do know is this: regardless of its source, the "ham" label is worn with pride by radio amateurs around the world.Although the origin of the word "ham" is obscure, every ham has his or her own pet theory. One holds that early amateurs were called hams because they liked to perform, or "ham it up" on the air. Another proposes that the name came from the "ham-fisted" way some early amateurs handled their code keys. One of the most exotic holds that "ham" is an acronym from the initials of three college students who were among the first radio amateurs. Perhaps the easiest to accept is that "ham" is derived from "Am," a contraction of "Amateur."
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What Are the Amateur Radio Bands?

Amateurs are allocated nine basic "bands" (i.e. groups of frequencies) in the High Frequency (HF) range between 1800 and 29,700 kilohertz, and another seven bands in the Very High Frequency (VHF) bands and Ultra High Frequency (UHF) ranges, as well as Super High Frequency (SHF) bands. Even though many Amateur Radio conversations may be heard around the world, given the right frequency and propagation conditions, Amateur Radio is basically two-way communication.

A LITTLE SOMETHING ABOUT MY SHACK

My shack consist of equipments as follows:


ICOM IC-718 with DSP (HF ALL BANDER)


ICOM IC-2200H (VHF BASE)


YAESU FT-60R DUAL BANDER HANDY


YAESU VX3R DUAL BANDER HANDY


MFJ 901B (ANTENNA TUNER)


DIAMOND SX200 (SWR METER)