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Joined: Mon Feb 20 2006, 05:49PM
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A Tesla coil can be modeled as a quarter wave transmission line. At that condition, the impedance looking into the base of the coil is Zin=Zo^2/ZL. This says that the input impedance looks smaller when the load impedance is high, up to the limit of looking like a short circuit.
This seems to mean that Tesla coils are low impedance devices when operating at high VSWR, so why not use a high frequency step down transformer to try to match the driver capabilities to the load? The secondary of the transformer would connect directly to the base of the secondary coil and ground to provide high coupling. High coupling would otherwise cause a near shoot through condition otherwise.
Low coupling would seem to me to lead to high reactive power in the driver, which will reduce efficiency.
This could allow for CW operation without a breakout point.
Anyone want to try this out? meow meow meow says the beckoning cat
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