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RE: [TCML] vacuum tube coil
Clive,
VTTCs do not make sparks as long as a conventional TC for a given power input, there parts are also more expensive (if you are planning on building a small coil, I won't say that is true for a large system) The wiring is also more complicated. The advantage is that they emit less RF interference. Here is an exert from an e-mail I got from the FCC consumer center regarding the legality of Tesla coils.
Spark gaps are horribly inefficient wide-band generators and were replaced by
the narrow band vacuum tube oscillator.
So, That is the advantage, they are a narrow band emitter. I hope this answers your question.
Scott Bogard.
> Date: Tue, 13 Nov 2007 12:54:04 -0800
> From: mrclivehansen@xxxxxxxxx
> To: tesla@xxxxxxxxxx
> CC:
> Subject: [TCML] vacuum tube coil
>
> Hello,
> Does anyone know what the distinct advantage of a vacuum tube tesla
> coil? I have seen a lot of hype regarding these and cannot spot the
> advantage. I am thinking about building one, however, I just want to
> know why they are better (or worse) than a traditional coil design
> with a spark gap. I found this schematic which is the one I am
> considering. http://research.microsoft.com/~swinder/sparks/tes2circuit.jpg
>
> -Clive
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