Which feed for f/D 0.25? SWL-Clanon Dec 1st 2020 Having similar problem (1.26mts dish , 0.25 F-d ) trying right now the Backfire bifilar helix https://g8haj.uk/?page_id=477by G8HAJ on the CST MWS (so far 27dbi gain ) checking efficiencies...as we speak...model