Wireless Telegraphy and Radio Wireless Information Network and National Broadcast System
CEE 102: Prof. Michael G. Littman Course Administrator: Hiba Abdel-Jaber [email protected]
Computers allowed for NOTETAKING ONLY Please - NO Cell Phones, Texting, Internet use 1 Consumer Goods 1900 - 1980
Economics and Politics
2 Consumer Goods 1900 - 1980
RMS Titanic with Marconi Antenna Economics and Politics
3 Marconi - Wireless messages at sea
RMS Titanic with Marconi Antenna
4 transmitter receiver
Marconi - Wireless messages at sea Heinrich Hertz’s Experiment - 1888
§ Spark in transmitter initiates radio burst § Spark in receiver ring detects radio burst
5 transmitter receiver
DEMO Marconi - Wireless messages at sea Heinrich Hertz’s Experiment - 1888
§ Spark in transmitter initiates radio burst § Spark in receiver ring detects radio burst
6 transmitter receiver
Heinrich Hertz’s Experiment - 1888
§ Spark in transmitter initiates radio burst § Spark in receiver ring detects radio burst
7 Electromagnetic Wave
wave-speed frequency
wavelength
Time or Length 8 Electromagnetic Wave
wave-speed frequency Wireless Telegraph
Hertz Discovery wavelength Marconi Patents Marconi Demonstrations
Time or Length 9 Marconi’s Wireless Telegraph
Wireless Telegraph
Hertz Discovery Marconi Patents Marconi Demonstrations
10 Marconi’s Wireless Telegraph
Wireless Telegraph
Hertz Discovery DEMO Marconi Patents Marconi Demonstrations
11 Marconi’s Wireless Telegraph
12 13 Marconi’s Patent for Tuning
14 Tuning Circuit
Marconi’s Patent for Tuning L C
coherer
1 1 ν = 2π LC 15 Transmitting antenna
Marconi’s Patent for Tuning
coherer Cornwall (England)
16 KITE Receiving antenna
Transmitting antenna
Saint John’s (Newfoundland)
Cornwall (England)
…..dot……….……dot……...... …….dot…... December 12, 1901 17 KITE Receiving antenna
Saint John’s (Newfoundland)
Marconi gets Nobel Prize in 1909
…..dot……….……dot……...... …….dot…... December 12, 1901 18 Marconi gets Nobel Prize in 1909
19 Wide World Wireless Plan in 1912
Each location to be a station pair, … Transmitter in New Brunswick NJ Receiver in Belmar NJ
20 RMS Titanic sinks April 15, 1912 (1912 Radio Act – 24 hour watch)
21 22 23 Inflexible Pioneer (with a dark side)
24 EE Prof. Reginald Fessenden University of Pittsburgh - 1906
25 Amplitude Modulated (AM) Carrier Wave
EE Prof. Reginald Fessenden University of Pittsburgh - 1906
26 Amplitude Modulated (AM) Carrier Wave
550 – 1600 KHz (Carrier Freq.) example – 1010 KHz (WINS)
20 – 10,000 Hz (Audio Freq.)
example – 440 Hz (musical note A4)
Combined Wave
27 Amplitude Modulated (AM) Carrier Wave
550 – 1600 KHz (Carrier Freq.) example – 1010 KHz (WINS)
20 – 10,000 Hz (Audio Freq.)
example – 440 Hz (musical note A4)
Combined Wave
Demonstration of Amplitude Modulation and Detection
28 Amplitude Modulated (AM) Carrier Wave
29 Cat’s Whisker Crystal Radio
30 Cat’s Whisker Crystal Radio
Where is the Tuner ?
31 Cat’s Whisker Crystal Radio
Where is the Tuner ?
32 Cat’s Whisker Crystal Radio
WHISKER
CRYSTAL Crystal Diode as One-Way Valve 33 Cat’s Whisker Crystal Radio Vacuum Tube Radio
WHISKER
CRYSTAL Crystal Diode as Light Bulb Triode as both One-Way Valve One-Way Valve and Amplifier 34 Vacuum Tube Radio
Light Bulb Triode as both One-Way Valve and Amplifier 35 David Sarnoff early (before WWI)
Telegrapher and office boy American Marconi Company
Meets Columbia Univ. Student Edwin Armstrong
Commercial Manager of American Marconi Company
36 David Sarnoff early (before WWI)
Telegrapher and office boy American Marconi Company
Meets Columbia Univ. Student Edwin Armstrong
Commercial Manager of American Marconi Company
37
“I have in mind a plan of David Sarnoff development which would early (before WWI) make radio a ‘household utility’ in the same sense as Telegrapher and office boy the piano or phonograph. American Marconi Company The idea is to bring music into the house by wireless.” Meets Columbia Univ. Student - Sarnoff in 1915 Edwin Armstrong
Commercial Manager of American Marconi Company
38 “I have in mind a plan of development which would make radio a ‘household utility’ in the same sense as the piano or phonograph. The idea is to bring music into the house by wireless.” - Sarnoff in 1915
Regeneration Circuit First IRE Medal of Honor SUPERHET Circuit FM Radio Circuit
40 Edwin Howard Armstrong
Regeneration Circuit First IRE Medal of Honor SUPERHET Circuit FM Radio Circuit
41 42 After WWI …
Radio Corporation of America
RCA founded out of American Marconi with GE executive as CEO RCA buys AT&T’s patents RCA buys Westinghouse’s patents
… and then dominates American Radio
43 After WWI …
Radio Corporation of America
RCA founded out of American Marconi with GE executive as CEO RCA buys AT&T’s patents RCA buys Westinghouse’s patents
… and then dominates American Radio
Listening to KDKA (Pittsburgh) - 1921
44 Einstein After WWI … Sarnoff
Radio Corporation of America
RCA founded out of American Marconi with GE executive as CEO RCA buys AT&T’s patents RCA buys Westinghouse’s patents
… and then dominates American Radio
New Brunswick NJ – 1921
45 45 After WWI …
Radio Corporation of America
RCA founded out of American Marconi with GE executive as CEO RCA buys AT&T’s patents RCA buys Westinghouse’s patents
… and then dominates American Radio
RCA Catalog of Products - 1922 46 Newlyweds - Edwin and Marion Armstrong in December 1922
RCA Catalog of Products - 1922 47 First Broadcasting Network - 1926 Newlyweds - Edwin and Marion Armstrong in December 1922
48 Entrepreneur Inventor
First Broadcasting Network - 1926 Newlyweds - Edwin and Marion Armstrong in December 1922
49 July 15, 1929
Entrepreneur
First Broadcasting Network - 1926
David Sarnoff President of RCA in 1929 50 July 15, 1929
Radio Drama: Mercury Theatre David Sarnoff on the Air with Orson Wells President of RCA in 1929 51 Radio Drama: Mercury Theatre on the Air with Orson Wells 52 3:34 into radio broadcast …..
Ladies and gentlemen, we interrupt our program of dance music to bring you a special bulletin from the Intercontinental Radio News. At twenty minutes before eight, central time, Professor Farrell of the Mount Jennings Observatory, Chicago, Illinois, reports observing several explosions of incandescent gas, occurring at regular intervals on the planet Mars. The spectroscope indicates the gas to be hydrogen and moving towards the earth with enormous velocity. Professor Pierson of the Observatory at Princeton confirms Farrell's observation, and describes the phenomenon as, quote, "like a jet of blue flame shot from a gun," unquote. We now return you to the music of Ramón Radio Drama: Mercury Theatre Raquello, playing for you in the Meridian on the Air with Orson Wells Room of the Park Plaza Hotel, situated in downtown New York. 53 3:34 into radio broadcast …..
Ladies and gentlemen, we interrupt our program of dance music to bring you a special bulletin from the Intercontinental Radio News. At twenty minutes before eight, central time, Professor Farrell of the Mount Jennings Observatory, Chicago, Illinois, reports observing several explosions of incandescent gas, occurring at regular Halloween Prank in 1938 intervals on the planet Mars. The spectroscope indicates the gas to be hydrogen and moving towards the earth with enormous velocity. Professor Pierson of the Observatory at Princeton confirms Farrell's observation, and describes the phenomenon as, quote, "like a jet of blue flame shot from a gun," unquote. We now return you to the music of Ramón Raquello, playing for you in the Meridian Grover’s Mill, West Windsor NJ Room of the Park Plaza Hotel, situated in downtown New York. 54 Halloween Prank in 1938
Presidential Fireside Chats with US Citizens 1933 - 1944 Grover’s Mill, West Windsor NJ
55 Presidential Fireside Chats with US Citizens 1933 - 1944
’ RCA Building at 1939 World s Fair 56 ’ RCA Building at 1939 World s Fair 57 July 23, 1951
’ RCA Building at 1939 World s Fair 58 July 23, 1951
February 1, 1954
59 July 23, 1951 Ham Radio Operators become Electronics Industry Pioneers
David Packard 9DRV
Frederick Terman 6AE
Jack St. Clair Kilby W9GTY
Steve Wozniak 6A6BND
60 Ham Radio Operators become Electronics Industry Pioneers Key Ideas
David Packard 9DRV Scientific: Marconi’s Tuning Circuit Armstrong’s Many Circuits Frederick Terman 6AE Social: Communications Systems Jack St. Clair Kilby Government Regulated W9GTY Symbolic: Fireside Chat with a Nation Steve Wozniak 6A6BND
61