HAM-MAG - arkansas ares races

1.­ History.
The waveform of the discharge of a capacitor into an inductive load has been well known for
years.
Trains of damped radio telegraphic waves made by a damped waves transceiver
In the past, radio transmitters were using such technique to generate bursts of waves, then
modulated by cw and later by microphone. Before the discovery of the first electronic tube, that
was the only way to communicate by rf!
A high voltage driving a spark could so generate bursts of damped waves into a coil, coupled to
the antenna circuit..
Example of a radioelectric
arc transceiver
Example of a radioelectric
& radiotelephonic arc transceiver
TheTitanic ship was using such circuits to generate radio waves of 600m of wave­lenght for its
radio­communications.
This is just the opportunity to invite the reader to consult the historic pages called « ondes
amorties » into the well­known encyclopedia « WIKIPEDIA »
http://fr.wikipedia.org/wiki/accueil
Of course, the discovery of the triode has conducted to the construction of radio­transmitters of
high­power and spark waves generators are now museum pieces…