Tag Archives: 9ZN

High Latitudes and Low Wavelengths

Posted on by June 2, 2021
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Donald B. MacMillan, an experienced arctic explorer and geologist, visited Hartford in early 1923 to discuss amateur radio with Hiram Percy Maxim.1 Among his various scientific investigations, MacMillan was planning to study the aurora borealis.  No one yet understood what the aurora was, but he had experienced it on previous trips and noticed that he could hear long wave radio signals through it. On his next expedition, besides photographing the aurora, he wanted to experiment with shortwave radio signals to … Continue reading →

The Chicago Plan

Posted on by June 2, 2021
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Amateurs were making progress taming the QRM problem. Sometimes a solution did not involve a new invention, or even technology at all. In a drama worthy of a Broadway play, Central Division Manager R. H. G. Mathews, 9ZN, described the bleak situation in Chicago before the war.1 Acute rivalry between local clubs had resulted in “gangs” in the north, south, and west sides of the city, “each having as a primary object the annihilation of the aerials of the others.” … Continue reading →