Hello ! I wish to build a dual band antenna for the 40 and 20 mts bands. I have a 33 ft 3" diam. boom and I am thinking of a two elements moxon rectangle for 40 mts and a 3 or 4 elements yagi for 20 mts. Any idea, suggestion (or even an already made project ?). Best regards and 73, Fabio, IT9GSF.