Yagi driven element length - HomeBrew Forum at eHam.net

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Yagi driven element length	Reply
by PE2G on June 29, 2009	Mail this to a friend!
Hello all, I'm new on the forum. I would like to build an open (non-folded) Yagi for UHF and have found a few useful Javascript applications on the net, e.g. http://www.k7mem.150m.com/Electronic_Notebook/antennas/yagi_vhf.html The 432 MHz, 22 element beam (click the button at the bottom of above page) shows a driven element length of 340 mm. I have a question about the total mechanical length of the driven elements. (I seem unable to find the answer anywhere.) It's unclear to me whether the calculated total length of 340 mm for the driven elements includes the gap between the two driven elements in the connection box. If so, the actual mechanical length of one driven element would be shorter than 170 mm (340/2)? Or should the overall mechanical length of both driven elements be 340 mm PLUS the gap in the connection box? Any comments are appreciated. Many thanks in advance! Frits, PE2G

RE: Yagi driven element length	Reply
by WB6BYU on June 29, 2009	Mail this to a friend!
Generally the length should be measured tip-to-tip, including any gap in the middle.

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