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 ...
It’s thus worth putting in the effort to make a better antenna, and if you’re not fortunate enough to have a lot of space, your best choice may be a magnetic loop. [Robert Hart] takes us ...
They can have an unlimited number of shapes and sizes, but can transmit/receive in almost any polarization. These antennas have moderate inherent directivity, but arrays can be better tuned for ...
Description: A.H. Systems' FCC-1 antenna provides an accurate standard for precise EMI and site anttenuation measurements (per OET-55 and ANSI C63.5). The FCC-1 is manufactured per the FCC balun ...
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 ...
The best indoor TV antennas let you receive free over-the-air broadcast TV channels without having to install a large outdoor antenna on the roof of your home. You’ll find that the main ...
Use this chart to estimate your obesity level based on your weight and height. An example is shown for an individual who weighs 80 kg (176 lbs) and stands 1.75 meters (175 cm or 69 inches) tall. Those ...
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 ...
As part of a nationwide roll-out, every home in Britain should be offered a smart meter from their energy supplier by the end of 2025. But what is a smart meter and how do they work? Here's ...
新中国成立75年以来，党中央、国务院高度重视人民生活，持续增进民生福祉，坚持让人民群众共享经济发展和社会进步成果，城乡居民收入和消费 ...
Freshmen of the class of 1977 of Beijing Normal University study in the library in March 1978. [Photo/Xinhua] As we mark the 75th anniversary of the founding of the People's Republic of China, it ...
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