40 Meter Delta Loop by K9IMM
Ted had a vacant feed line at the top of one of his towers and decided to try a 40 meter delta loop fed at the top with horizontal polarization.
The antenna seems to be stronger than a similar vertically polarized loop in most cases, but it also hears more noise.
Top fed at 95′, each leg is approximately 48 feet 5 inches. The vertical height of the antenna itself is 34 feet 3 inches resulting in this case with the bottom 60 feet 9 inches above ground.
Pictured below is an AIM-4170 scan of the antenna using calibration that negates the coax feed line. These results were used to calculate the dimensions of the required 72 ohm matching section.
EZ-Nec predicts over 7.5dBi gain at 27 degrees elevation broadside to the loop.