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Re: Fw: 1/4 wavelength
In a message dated 1/7/99 3:19:20 AM Mountain Standard Time, tesla-at-pupman-dot-com
writes:
>
> I have a question about secondary windings. According to a chart I found
> from Chris Hill, a 4" diameter secondary has 774
> feet of wire to make the coil. However the given resonant frequency is 540
> khz. According to a different web page I found,
> the length of wire in a secondary should equal the 1/4 wavelength, which
> for 540 khz is 454 feet. what gives? Am I missing
> something here? any info much appreciated. markjons-at-bright-dot-net
>
For the quarter wave freq., the 454 feet is correct. To way too many digits,
the equation would be Q-wave freq = 245892.764/feet of wire. Results in kHz.