[amsat-bb] homebrew Loop yagi

w7lrd@comcast.net w7lrd at comcast.net
Thu Jan 29 10:25:56 PST 2009

I am looking for some brain power from anyone who has built loop yagi's.  I am getting my information from The ARRL Antenna book 20th edition.   The book says follow exactly, however.  It calls for alluminum elements 0.0325 thick, I have copper 0.025 thick.  It calls for 3/4" alluminum boom I have 3/4 copper and some 1/2" stainless steel channel.  The feed to the driven element is UT-14, I have a  short piece with a SMA already attached, will connecting the SMA to a SMA-N adapter be acceptable?  I have seen the pretty pictures of Directive Systems antennas http://www.directivesystems.com/loopyagi.htm
Same idea only different parts.  Are these things pretty "forgiving" or are the components critical?  Also comparing the loop to a quagi the loop widths are 1/4" wide and the quagi used #18 wire, why?  My intent is satellites and/or terrestial.  Thanks for the bandwidth.
73 Bob W7LRD
AMSAT 28498

"if this were easy, everyone would be doing it"

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