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80 METER ANTENNA 2 ELEMENT YAGI AT 150' ON ROHN 55G TOWER WITH A 48' BOOM
I want to thank K9XV, NA8V, KC9FC (KA9F), W9KY, W9YZ, W9IH, N9RV K9SD, K9IG, K7NV, K7KR, GI0AIJ, and Dick Chance (K9XV's dad) for all their help with this project both physical and motivational, as well as engineering. A special thanks to my xyl, Ann for everything else. I started seriously thinking about designing, building and erecting the antenna in the summer of 2000. I was planning on modeling it after the 402CD. Mike, W9KY, and I did some rudimentary testing of a 402CD half element vertically, observing what the effect of the coil and capacity hat had. We added a 20' piece of 2" pipe to the element and this was the start of a year and a half obsession of getting the antenna in the air. Tom, K9XV, who I had never met before but who lives about 4 miles from my house stopped by one day in 1999 to introduce himself . We discovered that we had a mutual friend in Arizona (K7KR) that had similar interest in antennas. At this time Tom (and his family) didn't know what was to come in regard to his spending an inordinate amount of time over at my house helping me with the 80 meter antenna project. Many of the ideas/concepts are Tom's and I want to thank him for his contribution to this endeavor. The antenna is installed at the 150' level on a Rohn 55G. It is a 2 element loaded yagi (elements 90' long) on a 47' boom. It is switchable between two resonant frequencies - 3525kHz and 3790 kHz. CONSTRUCTION DETAILS BOOM, STRUTS AND TILTING BOOM TO MAST ASSEMBLY |