At the beginning wireless telegraphy
used the so-called spark transmitters originally based in the
Ruhmkorff spark induction coil. As aforementioned the
evolution of the Thermionics led to the birth of the first transmition
valves and soon the same were used in the modern transmitters
the heart of the modern the radio broadcasting.
The Ruhmkorff coil manufactured in the end of
century XIX. |
Schematic
of the Rhumkorff coil |
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