For those interested. this design has served me well for many years. I worked on it in 1994 while trying to come up with a good 40m dx loop; V51E across the other side of the kalahari was perfecting a bob tail curtain.
I will post how to put together a air core 1:1 balun using pvc pipe.
73s
va3qy/zs6ew/a22ew
Attachment deltaloop.pdf not found