In the first chapter of this book the processes of radio
communication were traced very briefly from start to finish. Before
going on to the receiver we should know something about how the
space in between is bridged.
We have just seen how electrical power can be transmitted from
one place to another at the not inconsiderable speed of nearly
300000 km per second, in the form of waves along a line consisting of
two closely spaced conductors. A southerner who was asked to
explain how it was possible to signal by telegraph from New York to
New Orleans replied by pointing out that when you trea ...
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