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Re: Is this a Wheeler coil?
Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>
See this document and the equations for "Conical Primary" on page three.
Here is a "Variometer" that uses such coils in an "accordion" stack
Some programs might calculate the inductance "better" if needed, or
at least to double check:
All this is for "round" spirals. As far as I know, the "square" ones
are done by "trial and error"... They are probably "close" to round
ones in "area"... The WWVB one is like a 50 year old salvage part
from the Navy but I think the put new wire on it...
This "might" tell more:
There is some accuracy date here for flat primaries:
At 04:05 PM 11/22/2006, you wrote:
Thank you to all the helpful persons out here in "Teslaland" who
have provided their valuable time to assist me.
>From all that help....it seems like my spiral needs are somewhat
different in geometry that what I had originally expected.
Picture if you will a flat piece of sheet metal in the X-Y
plane...say a square of 48 inches x 48 inches.
Into that sheet I need to make CUT a spiral...it can be any 'shape'
or geometry...but it needs to have an inductance between 3 to 10
It would be well if the adjoining turns are 'very close'
together...say 1/16 inch spacing between turns.
Lastly...and if needed...turns may be at different
'elevations'...such as to make a 'truncated cone" spiral extending
in to the Z - axis.
Kinda wonder if Wheeler had this in mind when he developed his equation....
Any/all help is Greatly Appreciated.
Happy Holiday Season to All.