Economy End Fed 80, 40, 20, and 15 Meter Antenna by K0DTQ
A shortened 40 meter rotary dipole - Resource Detail - The DXZone.com
Jessica McCarty on Twitter: "If you have ever wondered how tall a Brazil Nut tree is, here is a slide I made for the grad seminar on Global Plant Diversity. These Amazonian
Princess 40 Meters For Sale" - YouTube
Delta Loop for 40 m : Delta loop antenna plans for the 40 meter band
40-meter-long domus trimaran concept aspires to be the first truly zero-emission superyacht