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Re: Conical Secondaries



Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>" <davep-at-quik-dot-com>

Tesla list wrote:
> 
> Original poster: "S & J Young by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<youngs-at-konnections-dot-net>
> 
> List,
> 
> A few coilers have built cone shaped secondaries, such as the one at
> Griffith Observatory and the clone of it Bill Wysock built.
> 
> Question - other than aesthetics and perhaps saving some wire, are
> there any technical advantages or efficiencies to be gained?

	Not clear.  You note one: shorter wires also reduce losses.
	The former will be more complex, generally.

> With all the discussion of flat spiral secondaries, let's give conical
> secondaries their fair share of interest too!

	Shorter wire: good.
	More complex former: bad.

	Something 'sort of like' a conical secondary was used in some
	commercial RF operated HV supplies in the past.

	Tesla:
		Specified conical coils in some patents.
		Used them in some working coils.
		Did not (apparently) use them in Colorado Springs
		(which is his best documented large coil...)
	(Which is not to say one Must Not, however if he did not, there
	may be a reason...)

	best
	dwp