1.General Info:

F9FT (Frank Tonna) antenna was very popular in old Soviet Union VHF. It was very simple for home made assembling. Most popular is a 16 elements version. You can see my old QTH's 13 el. F9FT antenna on picture below. Now I use 16 el. F9FT (with non isolated elements from boom). It's more better than 13 elements.