Re: Need Formula for length of spiral

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

Original poster: "Steve Stuart by way of Terry Fritz <twftesla-at-qwest-dot-net>" <sstuart-at-glasscity-dot-net>

Try: 
       L = (Do - Di) / 2 * 1.6 * pi * T

Where:
       L  = conductor length
       Do = outside diameter
       Di = inside diameter
       T  = number of turns

It will give you a pretty close approximation

73 de Steve
·¸¸·´¯`·¸¸·´¯`·¸¸·´¯`·¸¸·´¯`·¸¸·´¯`·¸¸· 
w8an-at-w8an-dot-net
http://www.w8an-dot-net

Tesla list wrote:
> 
> Original poster: "John Tomacic by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <tesla_ownz_u-at-hotmail-dot-com>
> 
> Hi everyone,
> 
> Does anyone have a formula that I can use to calculate the length of wire
> required in a flat spiral coil? I have the formula for inductance, however,
> I really need the wire length.
> 
> Thanks,
> 
> John
> SST coiling in Ottawa.
> 
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