In the whirlwind of the modern digital electronic revolution the
days of analogue electronics, when international telecommunications
was conducted without satellites or fibre optic cables, are often
forgotten if not unimagined. Yet for a substantial part of the 20th
century this was the case, and the global telephone and telegraph
services were carried through the medium of long wave and short
wave radio. This book tells the story, following the initial work
of Marconi, of how radio technology developed from crude
beginnings, into a reasonably sophisticated network, successfully
competing against the cable network. Starting with electrical spark
technology and evolving with valves, semi-conductors came late in
the day for point to point radio. These systems were operated with
minimal automation and a high degree of human intervention,
managing and overcoming the limitations and difficulties of long
distance radio propagation. The relative efficiency of point to
point radio and the cost of replacement satellite installations
resulted in radio playing a part in international
telecommunications up to the 1980's, giving the author direct
experience of this fascinating medium.
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