|Note the three poles for the loop antenna.|
I setup in the front yard of my house. I wanted to test an antenna configuration for the upcoming Field Day. The antenna is a 30 ft long by 20 ft high loop supported by three 30 ft fiberglass poles. The motivation for the loop is to stay within the confines of the camp site at Falling Waters State Park. I anchored the poles with a length of angle iron. I pound them in the ground about one foot and strap the poles to them. I can attach the wires at the top of the poles and push the poles up. There is no weight at the top other than the wire going across. This is pretty easy to erect. The loop is fed at the bottom center which is about ten feet high. I used a Chameleon 5 to 1 transformer at the feed point and 30 feet of RG-8X to the tuner which is an LDG IT-100. The rig was my Icom 7100 on battery.
|The Chameleon 5 to 1 transformer at the bottom center of the loop|
|Angle iron at the base of the Jackite 31 ft poles.|
Myron WV0H kindly did some analysis on the antenna configuration. The analysis indicated that using larger coax like LM400 would be beneficial to reduce losses. I have many options for feeding and matching the antenna. I may try 300 ohm line as well. Note, I plan to dry run Field Day on June 2nd at the Falling Water Camp site. Then I can custom fit this antenna to the site. Of course I have many antenna options to consider.
|Operating from the shade|
I am looking forward to future Second Saturday sprints. I hope to work some members next time. I also did some satellite work earlier in the day. I met with Bob KK4DIV and Bob WB4BLX behind the PCARC Club house. I was able to get three on FO29. So I got a good dose of ham radio on Saturday.
|FO 29 linear Satellite Ops. Photo by Bob KK4DIV|