Tag Archives: antenna

New Diamond SD330?3.5-30MHz Screwdriver Antenna

Posted on 23 November, 2010 by admin

Length:Approx. 1.85m / Weight:Approx. 1.1kg Frequency:3.5-30MHz / Max. power rating:200W (SSB) Impedance: 50? / SWR:Less than 2.0 Connector:M-P / Type:1/4 wave center loading Power supply voltage & current:DC 12V 100mA Up-down time:aprrox. 50 sec.(3.5?30MHz), aprrox. 20 sec. (7?30MHz)

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Sea Water Antenna

Posted on 5 November, 2010 by admin

httpvh://www.youtube.com/watch?v=9tIZUhu21sQ

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Home made Yagi antenna

Posted on 5 May, 2010 by admin

One of my favorite ham radio activities is making contacts on satellites. It’s really fun to know that you’re controlling something that’s receiving and sending communications from space. But communicating with satellites means carrying a big Yagi antenna around. So, … Continue reading →

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Разработана компактная Z-антенна

Posted on 28 January, 2010 by admin

Исследовательская группа Национального института стандартов и технологий (NIST) совместно с коллегами из компании Boeing и из университета Аризоны в г. Таксон США разработала и испытала компактную антенну высокой эффективности с поперечным разером существенно меньше половины рабочей длины волны. Новое открытие … Continue reading →

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