Re: [TCML] 12"/16" Large Coil Diameter Selection

[Finn Hammer <f-h@xxxx>]

It won't make any difference, but go for the 12" tube, it will save you
some wire.

3:1 ratio is strictly Richard Quick, and it is an based on an outdated
point of view. And 60mA NST's.
One of the few good things DC Cox did here, was to advocate above 5:1
ratio. This ratio gets the topload suitably far up off the primary, so
that, provided that it (the topload) is sufficiently large in diametre,
will throw sparks to the ground instead of directly onto the primary, or
strikerail
But since you are going to pour the power from a pig into it, what you
_really_ might want to get is a tube longer than 60".....

Cheeers, Finn Hammer

----- Original meddelelse -----

> Fra: Ln2guy42@xxxxxxx <ln2guy42@xxxxxxx>
> Til: tesla@xxxxxxxxxx <tesla@xxxxxxxxxx>
> Dato: Fre, 03. jun 2011 23:06
> Emne: [TCML] 12"/16" Large Coil Diameter Selection
> 
> Hello everyone!
> 
> I am planning on winding a large secondary coil and have an option
> regarding diameter size.
> 
> I have on hand a large supply of 18 awg magnet wire as well as two
> segments of sonotube. They are both 60" in length, but one is 12" in
> diameter and the other is 16" in diameter. The coil will be powered
> by a 14.4 Kv 10 kw pole transformer.
> 
> I have researched the archives and found that the main considerations
> in designing larger coils to be the lower aspect ratio (suggested to
> be 3:1), a larger diameter (for it is more "efficient" and can handle
> more power), as well as aesthetic design (overall coil size versus
> spark output length).
> 
> I was wondering if anyone had any suggestions/comments on which coil
> diameter to use based on any criteria that are important in this
> decision.
> 
> I am also curious to know how a 4" increase in diameter of a
> secondary coil will make a difference (if any) in coil performance
> with regards to the above criteria.
> 
> Thank you so very much for any input and I appreciate all comments.
> 
> Amir M.
> 
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