I gave a presentation on the history of transoceanic radio communications to the Frankford Radio Club a few days ago.
My presentation covers radio technology development from the Maxwell's mathematical description of electromagnetic waves in 1860-1865, Hertz's development of a crude spark transmitter and spark receiver that proved the existence electromagnetic waves in 1886-1888, Fessenden's heterodyne receiver patent in 1901, Marconi's development of two way transoceanic high power radio spark communications from1901 through 1907, the development of multi-hundred-kilowatt spark, arc and electron tube transmitters from 1906 through the 1930s,
Armstrong's development of regenerative and superheterodyne receivers from 1913-1918, ARRL's very successful one way transatlantic test in 1921 at about 1 MHz, the development of military and commercial HF receiver, transmitter and antenna technology from 1921 through the 1970s, and the development of early operational satellite communications capabilities from before 1960 through the 1970s.
My presentation closes with a brief description of recent Armed Forces Day operations on the site of the original NSS station.
Enjoy!
73
Frank
W3LPL
My presentation covers radio technology development from the Maxwell's mathematical description of electromagnetic waves in 1860-1865, Hertz's development of a crude spark transmitter and spark receiver that proved the existence electromagnetic waves in 1886-1888, Fessenden's heterodyne receiver patent in 1901, Marconi's development of two way transoceanic high power radio spark communications from1901 through 1907, the development of multi-hundred-kilowatt spark, arc and electron tube transmitters from 1906 through the 1930s,
Armstrong's development of regenerative and superheterodyne receivers from 1913-1918, ARRL's very successful one way transatlantic test in 1921 at about 1 MHz, the development of military and commercial HF receiver, transmitter and antenna technology from 1921 through the 1970s, and the development of early operational satellite communications capabilities from before 1960 through the 1970s.
My presentation closes with a brief description of recent Armed Forces Day operations on the site of the original NSS station.
Enjoy!
73
Frank
W3LPL