04:189:102 Lecture Notes - Lecture 5: Lee De Forest, Vacuum Tube, Superheterodyne Receiver

• School: Rutgers University
• Department: Communication and Informatio
• Course: 04:189:102
• Professor: THELANDERSSON; BOACHI, HENRY

Document Summary

Also created a pants presser, ear cleaner, had over 300 patents. Patented a device that strengthened radio waves, didn"t work. Spade detector, relayed 572 words to ireland. People began to realize de forest based his creations off of fesseden"s. Audion tube and a was all he had left. The radio tube foundation of all radio. He wanted to rank his name with marconi. October 1907, a singer sang first broadcast through radio. Company collapsed because of fraud they said his paris transmit wasn"t really from paris but he was found not guilty and starts a 4th radio company. Combined waves of heavy frequency with lower frequency to create new wave. You could hear music, events, voices from far away. Kdka one of the first stations to broadcast regularly. 1924 there were 1400 stations and 350 million spent on radios. One person was so desperate he stuck his microphone out the window and said listen to the sounds of nyc.