W4BD 4020 Ventilatore Verticale Quarto Onda HF Portatile POTA Cavo Antenna per 15/20/40m
Antenna modeling software says 450 Ohm ladder line/window line shouldn't work for a fan vertical, however theproof is in the performance of what I call a "miracle" antenna. This is theW4BD 4020 multiband antenna.