Bob Miller wrote:
My homebrew 2-meter j-pole (made from 450-ohm ladderline) is also
resonant on its 3rd harmonic, 70cm, and has reasonably low swr on both
bands.

Third harmonic UHF verticals are not a good idea. The take-off-angle
is about 47 degrees so most of the RF is lost. Yes, they work after
a fashion, but not nearly as well as a 1/4WL vertical.
--
73, Cecil http://www.qsl.net/w5dxp



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