Amateur Extra: Sporadic E Propagation

Sporadic E Propagation

At what time of year is Sporadic E propagation most likely to occur? A. Around the solstices, especially the summer solsticeB. Around the solstices, especially the winter solsticeC. Around the equinoxes, especially the spring equinoxD. Around the equinoxes, especially the fall equinox Sporadic E Propagation refers to the phenomena where radio signals bounce off of …

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Amateur Extra: Gray Code


What is an advantage of Gray code in digital communications where symbols are transmitted as multiple bits A. It increases security B. It has more possible states than simple binary C. It has more resolution than simple binary D. It facilitates error detection Firstly, what the heck is “Gray code” anyway? The reflected binary code …

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General: Quad Antennas


Approximately how long is each side of the reflector element of a quad antenna? A. Slightly less than 1/4 wavelength B. Slightly more than 1/4 wavelength C. Slightly less than 1/2 wavelength D. Slightly more than 1/2 wavelength So lets look at what a “quad antenna” entails.  As you might have guessed from the name, …

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