Category Archives: Uncategorized

Understanding Antenna Gain in a Few Minutes

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I often enjoy reading on a topic and then try to summarize it in a short article on this website. But today isn’t the case. Sometimes a simple instruction video does a much better job than all the words I … Continue reading →

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How to build a foxhole radio receiver

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According to Wikipedia, and I quote; “A foxhole radio is a radio built by G.I.s during World War II. The foxhole radio differed from the crystal radio. A razor blade and pencil were used as a diode in a foxhole … Continue reading →

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Deliberate interference and radio wars

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Moments after people began using radio waves as a mode of communication, jamming or deliberate interference was invented. In the early days of radio communications, patent owners and radio technology manufacturers were in a constant battle to have supremacy over … Continue reading →

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Building an efficient HF station

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Upon discovering the Amateur radio hobby, I quickly realized what we’re the critical components needs to have an efficient HF station. In this case, bigger is not always better and here’s why. Radio waves are electromagnetic energy traveling thru space. … Continue reading →

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Where do northern lights come from

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Aurora in northern Canada Since an image is worth more than a thousand words, I found a very well made video-clip which vulgarizes how northern (polar) lights are formed. If you still haven’t completely understood the whole aurora borealis (North … Continue reading →

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Where on earth are all the Amateur-Radio operators

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World famous Amateur-Radio operator King Hussein of Jordan (JY1) I installed a “Revolver Map” widget on this website to gather information about people visiting. After a while, I realized the information gathered was not only giving me visitor’s location, but … Continue reading →

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Understanding directional antennas

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I stumbled on a great video on the internet which shows exactly how a Yagi directional antenna works. This video was produced by MakeMagasine.com and presented by Diana Eng. In short order, it demonstrate how a dipole antenna transfers energy … Continue reading →

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The 80-40-20-10 meter fan-dipole project

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This is the Alpha-Delta DX LB Plus I want to replace. At the beginning of summer 2012, I designed and built a 3 band fan dipole. I was so happy with the results that I decided to try the same … Continue reading →

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Beginner’s guide to HF radio propagation

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A long long time ago, as a kid, I had the chance to experiment with community band (CB) radios. On some occasions, especially during the summer season, we would receive signals from far far away and occasionally established two way … Continue reading →

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The 20-17-15 meter fan-dipole project

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For over a year, I’ve been using commercially bought antennas, one of which is a 160m-10m multi-band Alpha-Delta DX LC Plus. During that period of time, I had the chance to study this multi-band antenna and began figuring how it … Continue reading →

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