Thank-you very much! I think it also was in the QST magazine. I'll look in to it. signed DON N5XOFI did a GOOGLE search for you and found this YOUTUBE video describing the Saturn 6 Metre Halo used in 1962 which may be the same one? It doesn't operate on 2 metres however. I used a 6 Metre Halo in 1964 using a Layfayette 6 Metre AM rig running about 20 watts or so. Made a lot of contacts with it. Here is the YouTube video: 6 Metre Halo 1962