Modern ham radio operators often face restrictions on antennas ... meter ham bands. According to the video, performance below 7 MHz was lackluster, but it worked nicely at higher frequencies. The ...

For a quick example, a dipole antenna ... 80 m need about four times as much linear space. But if you’re willing to trade a large space requirement for a high voltage hazard instead, a magnetic ...

These antennas have moderate inherent directivity, but arrays can be better tuned for specific directions. Loop antennas have radiation patterns ... A circular polarized wave radiates energy in both ...

Here’s how it works. I couldn't live without a TV antenna. It's as important to me as any streaming service because it allows me to watch sports, sitcoms and news without having to pay a monthly ...

Rising 28,169 feet above the Earth's surface, Nepal's Kanchenjunga or "five treasures of snows" is the world's third-highest mountain and the object of destiny for the members of the Slovak ...

The first competition in the first modern Olympics in 1896 was the 100-meter dash, with American Thomas ... he lost to Bolt by an eyelash, 9.79 to 9.80. Gatlin says that's what caused him to ...

Bono, The Edge, Adam Clayton and Larry Mullen Jr. have brought an undeniably unique personality to rock music, and there musical output during the 80’s has undoubtedly contributed to them ...

Smart meters measure your gas and electricity use, like traditional meters do, and send the readings to your energy supplier automatically. They give both you and your energy provider accurate and ...

The installation of the main reflector for the antenna system of the 40-meter-aperture radio telescope completes in Shigatse, Xizang autonomous region, Oct 7, 2024. [Photo/CCTV News] The main ...

The inaugural women’s sprint hurdle event was over 80 meters rather than 110. It was won by American all-rounder Babe Didrikson, who knocked a second off the world record in the heats ...