A couple of these towers have first been built by
Nikola Tesla - the man himself, while testing a possibility of the transmission of
electric current through the
Earth's
core. By some
erroneous methodology, he thought he succeded and began publishing
bragging articles about his 0% loss
transmission equipment.
That was
dead wrong. However, did manage to build a Tesla Tower - a tower made up of a stack of hand-made
transformer coils that concentrated the
potential in a small
globe on the top of the tower. This generated an
electric voltage of 2 MILLION VOLTS!
It is worthwhile to note that even the extremely experienced professionals would still need some
CAD tools to do the same. Namely, most of the reproducers that weren't following
Tesla's schemes exactly as they were done experienced a
meltdown of their tower.
In the late 1950s and throught the 1960s, the
RAF tested the Tesla Tower. What happens often is that a
ball of plasma appears because of extremely high voltage. Needless to say, you don't want to be near when this happens.
This was only one of the many successful
Nikola Tesla's experiments in
resonance. One of his experiments in this field produced a demolition of a whole building block in
New York.