Полезные ссылки на наиболее удачные публикации по любительской тематике в обзоре ТОП радиолюбительских интернет ресурсов за прошедшие 2 недели. К просмотру предлагается обзор лучших радиолюбительских сайтов: «Top Amateur Radio Websites» (Выпуск No 2009). Подборка интересных и полезных для радиолюбителей ссылок составлена 1 июня 2020 года на DXzone.com.
NOAA Satellite Signals With a PVC QFH Antenna and Laptop, this website also link to a github where you can find files and supporting documentation for constructing a QFH Antenna
A growing website dedicated to bringing you great accessories to use along with SDR, without breaking the bank. Worldwide shipping and fast dispatch
JSatTrak is a Satellite tracking program written in Java. It allows you to predict the position of any satellite in real time or in the past or future. It uses advanced SGP4/SDP4 algorithms developed by NASA/NORAD or customizable high precision solvers to propagate satellite orbits.
This page host a simple Windows program that will create an overlay for Google Earth that displays the Maidenhead grid. If you only need 4-character locator coverage, you can download an alternative ready-to-use kmz-file.
The folded dipole antenna or folded dipole aerial is widely used, not only on its own, but also as the driven element in other antennas like the Yagi antenna and various other types of antenna. Folded Dipole Myths, Bandwidth and details on folded dipoles
Learn Morse Online in 40 lessons with this web based morse code learning program, based on the Koch method. Choose the lesson, adjust the wanted parameters, and start the transmission of a set of random characters based on chosen lesson. Recognize the code and verify it at the end of the lesson.
The Quadrifilar Helical antenna provides circular polarization and complete hemispherical reception, which is precisely what is needed to receive the polar orbiting weather satellites, and as a 2 meter antenna it will receive horizontal, vertical and clockwise circular polarization.
This free PDF file contains two Worldwide grid square maps. The first map displays the fields (first two letters of a maidenhead locator) while the second includes also squares (third and fourth digit) and it can be useful to determine what is your ham radio grid square. PDF file can be enlarged and scaled to A3 and higher dimensions.
How do you practically conduct an RF exposure evaluation of your station? What information do you need and what values must you compute? What are the tools and techniques readily available to the casual operator to ensure compliance with the FCC regulations about RF exposure
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