Re: Arc/Spark RE: [TCML] Magnetic Quenching

[Ed Phillips <evp@xxxxxxxxxxx>]

In engineering a _spark_ is quite distinct from an _arc_.
 An arc oscillator is (noisy) CW, a spark gap provides damped
 waves.  An arc (in operating range) has negative resistance,
 this allows gain, which allows oscillation: CW oscillation.

 With respect, the usage of the terms 'arc' and 'spark' in
 Tesla Coil discussions is rather too lose.

 best
  dwp"

	Correct.  As a matter of interest I have a picture saved [somewhere - can't find it] of one of Pulsen's labs ca 1906 which shows what is obviously a CW TC, presumably powered by an arc.  Obviously doable and a properly function arc should be at least 50% efficient, probably as good as any of the VTC's or spark excited coils.  On the other hand it's not as simple as a straight spark which works so well and is so cheap and easy.

Ed


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