It may have been this page, though I'm pretty sure the resource I used told me what length to cut it. http://www.diytvantennas.com/dipole.php http://www.diytvan

It may have been this page, though I'm pretty sure the resource I used told me what length to cut it. http://www.diytvantennas.com/dipole.php http://www.diytvantennas.com/dipole.php Still, we can figure this out: Wikipedia says North American UHF frequencies are on average 680MHz across all channels, which corresponds to a wavelength of about 44cm. A folded dipole needs to have a length half of that, so we want a 22cm antenna when folded, plus about a 1cm gap.