Here’s the fourth installment of Ask Dave, which focuses on a CW conundrum: how to tune a CW signal with your HF receiver so that the other station can hear you easily. The process is called zero-beating, meaning making the signals match in tone. Your HF radio has a button or control called “spot” that enables this, giving rise to the jargon “spotting his signal.”
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By request here is the band graphic showing where certain types of activity take place on the 20-meter band. This is by no means a complete representation, but highlights some of the more interesting features. This graphic was used in the second Ask Dave video.
Graphic from Ask Dave Episode 2, showing some key features of the US Amateur 20-meter band (14 to 14.35 MHz)
This week’s installment is built around a response to a question from Justin Smith, AF7QN, who asked about calling CQ and where to listen for a response. That question sparked this tour of the 20-meter band for the new General or Extra, or for those hams who might like to try something new.
The key graphic showing the highlights of the 20-meter band can be found by clicking here.
Please comment! Let me know what you think of the format, and what I might change. You can ask questions directly by going to the Ask Dave! page by clicking here.
Here it is: the last video in the Amateur Extra series! This is your video introduction to Section 11.2, “RF Exposure,” in the ARRL Extra Class License Manual for Ham Radio. The material in the section is very similar to the material in Section 8.2 in the General Class manual. Also included are some parting thoughts, including information about a new video series, “Ask Dave!”
You can return to the list of Amateur Extra videos by clicking here. You can go directly to the Exam Preparation video by clicking here.
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 Class training videos by clicking here.
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 return to the list of Amateur Extra class videos by clicking here.
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