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telegraph signal set from my parents. its blue painted metal case had the morse code printed in white on top, a simple key, a light bulb, an internal buzzer, and it operated on two d cells. it was fascinating for a while, but my interest really took off when i decided to make my own crystal radio set...
. he studied the morse code used in radio and had contacts of nearly miles with his wireless outfit. marshall become an instructor of industrial arts at the olathe, kansas high school at age upon his graduation. that job lasted years until his retirement in . his thousands of students benefited from...
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