Monthly Archives: March 2013

Radiotelephone

Posted on by June 2, 2021
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As vacuum tubes were making CW practical, they were also making voice transmissions possible. Experimental broadcasts using radiotelephone—or just “phone” to hams—began as experiments by amateurs and some of the wireless telegraph companies, including Marconi and DeForest. In these early years of radio, just having a receiver to listen to the limited number of phone broadcasts was sufficient to be regarded as a radio amateur. The Marconi Wireless Telephone was demonstrated publicly for the first time on 12 June 1916.  … Continue reading →

Spark to CW

Posted on by June 2, 2021
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Through the years, starting well before the war, amateurs occasionally had discussed undamped oscillations and how Audions could be used to detect them.1 By summer 1916 a government radio inspector was predicting that in five years most amateurs would be using undamped waves.2 QST noted that with the influx of “mature men” and a willingness to spend more (around $250) on equipment, it was just a matter of time before a “Mr. Undamped Wave” would appear and lead the way. … Continue reading →

QSS Tests

Posted on by June 2, 2021
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Never having observed the effects of a complete solar cycle on signals before, or at least not having paid attention to them, hams continued to be impressed, intrigued, and puzzled by the changing on-air conditions as the minimum approached, still two years away as the new decade began. At least one thing was clear: Radio waves didn’t simply move from point to point along a straight line and decrease in strength with distance.  Something else was happening too, but what? … Continue reading →

Freaks

Posted on by June 2, 2021
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The uneven, partly unpredictable nature of radio wave propagation continued to fascinate hams during and after the war. The solar cycle had peaked around 1917, just in time for hams to miss it because of the war shutdown.  Now, with the next solar minimum little more than two years away, hams had just gone through the first winter season of prime-time operating since the reopening—and had begun to notice some peculiarities and marked differences in signals from when they last … Continue reading →

Armstrong in QST

Posted on by June 2, 2021
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At age twenty-nine and already one of the most well-known radio engineers in the world, Edwin H. Armstrong was a veteran of the great war, and the president of the Radio Club of America. He was also professor of electrical engineering at Columbia University in New York City, where the R.C.A. was based and met regularly. Later recognized as one of the most important inventors in radio, Armstrong embodied the close relationship between amateur experimenters of the early years and … Continue reading →

New Hams (F.)

Posted on by June 2, 2021
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While somewhat greater in number than before the war, women hams were still regarded by other amateurs with a mixture of curiosity and amusement. Nevertheless, even before the war several were already experienced as telegraph operators and had become prominent in message handling as amateurs. Coincident with the closing down of amateur activity for the war, an editorial in August 1917 announced that “The Ladies are Coming,” reporting that “several hundred of the fair sex” were now among the brethren, … Continue reading →