NTS

This page provides information and links related to the ARRL National Traffic System.

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Common Mode Currents

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 I was explaining to a fellow ham the other day about the need for baluns in the shack. For my purposes, I have a balun on my antennas that are naturally unbalanced. For example, feeding a dipole directly with a coax creates an unbalanced condition. This causes common mode currents to flow on the outside of the coax feed line. This causes the coax shield to radiate into space - most commonly, into your neighbors stereo system. To my surprise and delight, I ran across a YouTube video published by Gregg Messenger - VE6WO where he shows how common mode currents can occur on a feedline. How To Build A Terrible Antenna! Common Mode Current Experiments
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Listening to Whistlers

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I have an interest in building an ELF receiver that can hear whistlers. Here is a YouTube video of what they sound like: And, here is a link explaining what they are:  https://en.wikipedia.org/wiki/Whistler_(radio) One problem is that, to hear the signals in the range of 0 Hz to 20 KHz, it is best to get well away from the urban environment with all the 60 Hz power line noise. So, I thought one could place the receiver on a mountain top. It could be powered with solar cells and beam the data back on a telemetry link (UHF) to a receiver here in the valley. From there, the data could be made available as a feed to the MESH network sites. More later....
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The Richard Meiss - WB9LPU - Telegraph Keys

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In the world of Amateur Radio, there are many hobbyists that combine their love for radio with a love for fine machinery. Here is one example of that combination. Richard Meiss, WB9LPU, has been designing and making home brew keys since 1998. The RotoTwin key, shown in the video below, is one of the most unique. But, his skill does not stop there. Check out the links below the video.   REFERENCES: WB9LPU YouTube Videos (it will make you weep!) WB9LPU's Key Corner W1TP Museum of Telegraphy (Richard Meiss Keys)
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