Thread View: dc.ham-radio
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Started by Kenneth McKenzie
Wed, 08 Nov 2000 00:00
RADIO
Author: Kenneth McKenzie
Date: Wed, 08 Nov 2000 00:00
Date: Wed, 08 Nov 2000 00:00
15 lines
1306 bytes
1306 bytes
Thomas Edison describes in his patent application for the wireless telegraph in May of 1885 as follows; For receiving signals I locate in said circuit between condensing surface and the ground a diaphragm sounder which is preferably one of my electro motograph telephone receivers. The first wireless telegraph picked up the telegraph signals with a loud speaking telephone. De Forest patented his triode in 1907 twenty two years later. For his first radio he used an Edison loud speaking telephone. Edison's Patent and an essay about wireless transmission can be seen on my site at www.geocities.com/starapex Click on the radio Cheers Ken McKenzie
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