Schumann Resonator

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Hi, I have been hoping to build something similar. Thanks very much for posting this. Just a few questions if you don't mind. In regard to the pdf of the coil and scaling, whats the best way to deal with a pdf in Eagle ? Is it possible to list trace width and trace distance so we know what the scale should be in Eagle ? And also, I have seen a few projects for generating 7.83 Hz and there appear to be a few variations on the pcb coil design. Is anyone aware of a .ULP to generate different types of bifilar coil in Eagle ? eg. circular, square, octagonal etc Hope these question aren't annoying. Many Thanks
 
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