... they didn't used the word electronic in those days. Vacuum tubes were three element vacuum tubes. And detectors and ... telephones. Then during World War I, the three-element vacuum tube that Dr. Deforce had developed was now being put read more...

... could be in any desired place without time passing. The Vacuum Theory If this theory should ever prove true, then the vacuum theory of propulsion may be a clue for further scientific ... terrific upward thrust which no 15 known force can match. A vacuum in the direction of travel is created. If a low pressure is read more...

... that gave Lee de Forest the idea of the three - element vacuum tube that led to radio voice transmission. It was this read more...

... that gave Lee Deforest the idea of the three element vacuum tube, that led to ra dio voice transmission. It was this read more...

A Talk with John Fetzer August 29, 1986

... coming out of the crystal receiver stage when the first vacuum tube became available after World W ar I -- the Signal ... idea of putting a microphone into the plate circuit of a vacuum tub e, which resulted in wireless transmission by voice. read more...

... at Kitty Hawk. • Lee de Forest invents the three-element vacuum tube. • John Fetzer acquires a telegraph and learns Morse ... in Europe. • The transistor is invented and replaces vacuum tubes in radios. • Detroit Tigers games first broadcast on read more...

... idea of putting a microphone into the plate circuit of a vacuum tube, which resulted in wireless transmission by voice. read more...

... in a good way. when he died, there was a huge leadership vacuum. I was there as the president, but there's no way that I read more...

... him like at seven or something. And I was getting out the vacuum cleaner like about 6:25 or something and I look out and a ... people came to parties early, I usually handed them the vacuum cleaner! But anyway, so he shows up and we just kind of read more...

Category: Oral Histories
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