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A few questions about radio and transmitting

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minimum waveguide diameter is 1/4W. 1 wavelength at 100Mhz is 3 meters. waveguide diameter at 100Mhz is 0.75 meters, or about 2.25 ft.
 
UncleJed, I'm going by the equations on this site.



Which is a typical cantenna. It seems to be 3/4s wavelength. or about 3.5 inches for the 2.4ghz range. For a 3/4 wavelength at 100mhz it would be 7 and half feet (give or take)
 
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