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Re: Tesla's CS Coil Data from ScanTesla and all....



Original poster: Mddeming@xxxxxxx

In a message dated 6/26/05 10:34:13 P.M. Eastern Daylight Time, tesla@xxxxxxxxxx writes:
Apart from the coupling I measured another interesting aspect of
the design was the choice of aspect ratio for the extra coil (or at
least some variations of it) - 1:1 for some. That ratio scores the
highest Q for any coil I've measured and is also cited for that
reason in other literature.


Malcolm

 Hi Malcolm,

It has been shown in several references that the theoretical maximum Inductance for a given length of wire (and hence for a given resistance) occurs in a helical coil when h=0.9r, which, however, is not a practical ratio for most coils. The 1:1 ratio would be consistent with having the best XL/R in a "practical " dimension coil.

Matt D.