![]() ![]() Semple demonstrated some crystal pick-ups that Brush was working with, leading Chorpening and Woodworth to found The Astatic Microphone Laboratory, Inc. Their mutual friend, Charles Semple, worked for Brush Development Company where he had been experimenting with Rochelle salt crystals. Woodworth, W8AHW began experimenting with different types of microphones for their "ham' stations. ![]() In 1930, two amateur radio operators, Creed M. Only 10,000 NUMBERED microphones were made. My Serial Number is: 03916 and I live in Kansas CityÄescription: 18 Carat GOLD PLATED version of the Classic D-104(TUG9) amplified stand. I am curious as to how many are left and what the sequence of serial numbers are. I have a Golden Eagle D104 and I thought it would be nice to follow the serial numbers and locations. ![]()
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