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Original poster: "David Thomson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <dave-at-volantis-dot-org>
Tesla coils only use induction for transmitting the initial pulse. Most of
the time the coil is operating, it is ringing and the high induction works
against the resonant rise causing the wave form to damp quickly. The
purpose of attaining resonance is to sustain the ringing and actually use it
to store and accumulate electrical movement.
In fact, Tesla's coil for generating the highest voltage has very little
mutual inductance compared to the helical coils we experiment with today.
His most powerful coils, for generating high voltages, were flat spiral
secondaries. The primary was designed such that it's inductance would
minimally interfere with the resonant rise of the secondary, thus attaining
thousands of times more electrical movement than the primary. This is
explained in his US patent 787,412.
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Monday, January 28, 2002 5:36 PM
Original poster: "Peter Lawrence by way of Terry Fritz <twftesla-at-qwest-dot-net>"
Trick question for the day...
Tesla coils work by "induction", the changing magnetic field around the
secondary coil induces a voltage in it. The direction of the induced voltage
is that of the coil, so the question is why don't the sparks also go around
in the same circular pattern as the induced voltage.
Trickier question, why doesn't this happen when the toroid breaks out early.