For 160m I use a loaded tower with 36 ground radials 30m long. The antenna works well allowing for regular QSOs with VK during appropriate seasons ( April/May and September/October) but is lacking in 160m contests. I decided to add a double T vertical some 30m from the tower, consisting of about 30m top wire, 30 bottom wire 3m up, and a vertical element about 20m long. In transmit, The double T antenna was almost as good as the loaded tower. When the T antenna was tuned as a reflector, F/B was about 5 db and the gain around 2 db. However in operations I could not sense any advantage of this 2 el setup, and the double T was removed.