Mechanical Morse Keyer

For those CW operators on a tight budget:

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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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