This high-definition video shows the Sun in the 171-angstrom wavelength of extreme ultraviolet light. It covers a time period of January 2, 2015 to January 28, 2016 at a cadence of one frame every hour, or 24 frames per day. This timelapse is repeated with narration by solar scientist Nicholeen Viall and contains close-ups and annotations. The 171-angstrom light highlights material around 600,000 Kelvin and shows features in the upper transition region and quiet corona of the Sun.
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From price to performance, the SteppOut Vertical is a true 1/4-wave vertical for 20-10m and for under $50! Let’s have some fun. The end product of this project is good “stealth... Read more
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Heil Sound is marking 2016 as “50 Years of Maximum Rock & Roll.” The yearlong celebration will kick off at the Winter NAMM show in January. A commemorative podcast series of interviews w... Read more
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Icom IC 7851 vs IC 7800 Video from Icom Inc. showing a local oscillator C/N characteristics comparison between Icom’s IC-7851 and IC-7800 HF/50/70MHz Amateur Radio Transceivers. For fu... Read more
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Sam, R7AB has one of the largest antenna systems for HF in the world. Here is a video fly-by showing just part of that site. You will be amazed at what is there Read more
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 of Our Sun in Action){kind=link}