ARLA/CLUSTER: Vintage Radio: The Life, Decline and Possible Rebirth of AM

[Sergio Matias]

http://wshu.org/post/vintage-radio-life-decline-and-possible-rebirth-am

"In the beginning, there was Morse code. After the discovery of radio waves
and how to create them, came the question of how to use them for
communication. If a transmitter could be switched on and off with a
telegraph key, then it could transmit long and short bursts of radio waves
corresponding to the long and short dashes and dots of Morse code.

The receiver would detect these bursts and convert them to audible dashes
and dots that the operator could hear. Given how robust a Morse signal is,
the large commercial traffic companies like Marconi’s were quite satisfied.
However, amateur operators using Amplitude Modulation (AM) to inject audio
into a radio signal, not to mention the general public listening to them,
were more interested in audio that they could understand, be it voice or
music. Thus began the early roots of broadcasting.

But why AM? (..)"


73,

-- Sérgio/ct1hmn
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