Topband: Phased verticals

jcjacobsen at q.com jcjacobsen at q.com
Tue Jul 31 16:58:59 EDT 2018


Gd' day to all, 

Several of us were sitting around drinking coffee and the discussion came around to phased verticals. We then had a disagreement on how to feed them. So here is the question: 

You have room to put up a pair of 1/4 wl verticals, spaced 1/2 wl apart. You want to feed them 180 degrees out. One group said use the correct length of coax on one feed to achieve the reversal. Another said just use a network of some kind. The last group said just feed them with equal lengths of coax, but reverse the feed to one vertical ie: center conductor to radial system, shield to vertical element. 

So, at the risk of opening Pandora's box of worms, and not wanting to invoke tower "wenches" or plastic owls, what say you all? 

Tnx in advance and 73 from 
Jake K9WN 


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