Topband: Delta loops antennas

[wb6rse1 at mac.com]

Over the last decade I have experimented with a variety of loops: coax, delta, diamonds, flags. The only real-estate available has been the roof of my house. There is just no room on my city lot to accommodate a K9AY or beverages, let alone a 4-square - much as I would like to have had the luxury of trying any of them. My experience with a roof mounted FOØAAA quickly demonstrated that it must be ground mounted. No surprise, ground dependent designs are just not effective when elevated on a roof. 

I've also tried a variety of toroidal cores for the loop matching transformer with mixed results. A binocular core transformer, as described by W8JI and others, finally made the large loops sound like real antennas.

I agree that the K6SE original QST paper and ON4UN's latest "Low Band DXing," book deserve study. George, AA7JV, also has demonstrated the effectiveness of a variety of ground mounted loop configurations.

73 - Steve WB6RSE