Monthly Archives: May 2015

Amateur Extra Lesson 11.1, Hazardous Materials

Here’s your video introduction to Section 11.1, “Hazardous Materials,” in the ARRL Extra Class License Manual for Ham Radio. Topics discussed include polychlorinated biphenyls (PCBs), Beryllium, Lead (Pb), and Carbon Monoxide. You can return to the list of Amateur Extra … Continue reading

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Amateur Extra Lesson 10.2, VHF/UHF/Microwave Propagation

Here’s your video introduction to Section 10.2, “VHF/UHF/Microwave Propagation,” from the ARRL Extra Class License Manual for Ham Radio. Topics covered include the radio horizon, multipath, tropospheric propagation, transequatorial propagation, auroral propagation, meteor scatter communications, and earth-moon-earth propagation. You can … Continue reading

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Amateur Extra Lesson 10.1, Topics in HF Propagation

Here’s your video introduction to Section 10.1, HF Propagation, in the ARRL Extra Class License Manual for Ham Radio. Topics include ground wave propagation, NVIS, sky wave propagation, Pederson ray, absorption, long-path and grayline propagation, and fading. You can return … Continue reading

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Amateur Extra Lesson 9.4, Antenna Design

Here’s your video introduction to Section 9.4, “Antenna Design,” in the ARRL Extra Class License Manual for Ham Radio. This is a short section and a short video. Included are short demos of both EZNEC and 4nec2. To return to … Continue reading

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Amateur Extra Lesson 9.3, Antenna Systems

Here’s your video introduction to Section 9.3, “Antenna Systems,” in the ARRL Extra Class License Manual for Ham Radio. Topics covered include impedance matching of transmission lines to antennas, how transmission lines work, including electrical length, propagation velocity, loss, reflection … Continue reading

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