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 →