In 1896, Marconi successfully covered a distance of about 3 km using electromagnetic waves. A little later, he established radio contact across water between Lavernock Point, South Wales and Flat Holm ...

[Ashish] let us know about his experiments in recreating the earliest type of radio set: a spark-gap transmitter and iron-filings coherer. He goes through the historical development of the kit in ...

When we think of a spark gap radio transmitter, most of us immediately imagine an early twentieth century ship’s radio room or similar. Most of us know these transmitters as the first radio systems, ...

How can we make a spark transmitter? To create a spark you need a large voltage difference: the bigger the voltage difference, the bigger the spark. The bigger the spark, the more radio waves are ...

Ever since a young Henrich Hertz began constructing the scores of electrochemical cells needed to power the world’s first radio transmitter in the 1880s, designers have sought out better and more ...

Why does a spark produce radio waves? Air normally does not conduct electricity. However, if the voltage is high enough (for a given amount of air) the electrical energy causes the air atoms and ...