Re: optimal aspect ratio

["Tesla list" <tesla-at-pupman-dot-com>]

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

> Fellow coilers,
> 
> The latest edition of a German radio amateur magazine is dealing with 
> the optimal aspect ratio of cylindrical single layer air core coils 

	Optimal for what purpose?
	Smallest coil?
	Shortest coil?
	Most inductance?
	Highest Q?

> (like the solenoid type primaries in our TC systems).

> The author proves, that coils with an aspect ratio length/diameter of 
> 0.45 provide maximal inductance and minimal resistance.

> The number of turns is calculated from
> 	7.43 x 3rd root(L in µH/dia in mm) 

> Unfortunately there is no URL available (the publisher wants to sell 
> the copies of course.

	Wire spacing?
	(possible) influence of length of wire, as independent
	from inductance?

-- 
	best
	dwp

...the net of a million lies...
	Vernor Vinge
There are Many Web Sites which Say Many Things.
	-me