Once again I climbed up my trees and installed an antenna. This time an inverted delta loop for 80m.
|1:4 balun. As you see, all joints aren't weather sealed yet.|
I started the project with a 82m cable. With pure luck, the initial SWR tests were good for 80m, so until I measure my antenna with a MiniVNA I let this be as it is.
The results then?
I hadn't checked the theory for delta loops, so I was surprised about the results: it shows SWR far less less than 2:1 for all HF bands, except 160m but including the WARC bands! After a few days of testing I have an antenna that can do QSOs on all those bands. Including some nice DX stuff: VE on 80m, KH6 and ST2 on 40m, JY on 30m, ZL on 20m, Z24 on 12m and LU on 10m. Yes, I am happy with this all-round antenna!
Later experiences (updated 26.Nov .2011):
This loop makes me hear a lot more on the bands than my band-specific dipoles and ground planes. The difference is like looking at the stars with or without binoculars!