491 EFHW antenna balunununtransformer - 12KW SSB 300W FT8 - 80-10m

High-efficiency 491 transformer for EndFed Half Wave (EFHW) antenna 1.2KW SSB 300W FT8 From 80 up to 10m ! Classical 491 balunstransformers are based on FT240-43, with wide spaced windings, and a crossover.  But do you know that such design has a poor efficiency, down to 66 and up to 80 max only? Dont you want your RF power to be effectively radiated, without excessive heating, limiting your output power? Get the best High power 491 solution with this unbeatable product ! Efficiency measured 85 from 80 up to 10m Closewound windings autotransformer (142 turns ratio) Genuine stack of 3x FT240-52 from Fair-rite 2 220pF capacitor from TDK (6Kv) unique design on the market ! High-end 1,8mm enameled copper wire, double-coated, 210c and 10Kv insulation (spec IEC 60317-13) 11,5x9c