[DXCommander] shows us his 40 meter two-element vertical antenna build in the video below. A typical Yagi is just a dipole with some slightly longer or shorter elements to direct or reflect the ...

[AD0MZ]’s adjustable dipole solves that problem, making the antenna usable from the 80-meter band down to 10 meters. To accomplish this feat it uses something familiar to any sailor: a capstan ...

On the Who’s Buying What page, Jampro Antennas/RF Systems reported sales and delivery of FM systems to three stations in the Educational Media Foundation’s K-LOVE network. The contracts included a two ...

Continuous-wave vertical emission is demonstrated at approximately 3.5 THz in a very regular, low-divergence (±10°) beam, with a high slope efficiency of at least 160 mW A−1 and a mere 6 mA of ...