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Mechanical TV Sets of the 20s and 30s

 

The first mechanical television systems that produced real television images were developed by John Logie Baird in England and by Charles Francis Jenkins in the U.S. in the mid 20s.

Picture quality was very poor, and the screens were only an inch or so wide and were usually made up of only 30 to 60 lines (compared to 525 lines in the present U.S. system). Most of these sets used a motor to rotate a metal disk to produce the picture,  with a neon tube behind the disk to provide the light. Later mechanical systems used the lens disk, mirror screw and mirror drum.  The Scophony system was the only mechanical system capable of high definition pictures, but it was developed at a time when the cathode ray tube had already been demonstrated as a better method of displaying television pictures.

By 1931, television was being broadcast from about 17 stations in the U.S., not only from the major cities such as New York and Boston, but also from Iowa and Kansas. Several manufacturers were selling sets and kits.

The frequencies used for TV broadcasting at that time could travel long distances, so reception was possible hundreds of miles from the station. However, the pictures suffered from not only poor resolution, but also fading and ghosting.

In Columbus, Ohio, Murray Mercier, born in 1912, was one of the first people to watch television. Click here for his story.

In England, regularly scheduled 30 line television programming was first broadcast by the BBC in September of 1929.  At first, only the picture was transmitted for a few hours a week, after regular radio broadcasting was completed for the day. By March of 1930, sound and pictures were transmitted together. Most countries in Europe had at least one mechanical station.

Because of the poor picture quality, mechanical television was not a success. By 1933 almost all stations were off the air in the United States. Mechanical television transmission by the BBC continued until 1935, and in the Soviet Union until 1937.

 

Gallery of mechanical sets

Database of surviving mechanical sets

American mechanical TV stations

European mechanical TV stations

 

More on Mechanical Television

1932 television receiver circuits How we display pictures on mechanical sets
Another early Columbus, Ohio experimenter James Thurber's comments on TV in 1931
Baird's instructions to television actors Magazines about mechanical TV
Bell Labs Mechanical transmission standards
California Television Society Mechanical television demonstrations
Corona discharge in mechanical television Modern Mechanics 1932 TV receiver design
CRT receiver for 30 line television The Museum's mechanical camera 
Denis Asseman's mechanical set replicas Murry Mercier, Columbus TV experimenter
Don Lee Broadcasting - making a disk National Schools mechanical camera

Dutch 1932 television booklet

Peter Yanczer's site
Early recordings of TV images Program schedule of Baird TV
Felix the Cat Russian homemade mechanical TV
Intermediate film mobile television camera Scanning belt receiver
First British reception of U.S. TV Mechanical theater projection systems
First vaudeville show broadcast in Chicago Television training schools
How television came to Boston TV across the Atlantic in 1928
Hollis Baird - a Canadian? Western Junior Camera and Transmitter

 

 

These sets are in our collection

Click on the Image for More Information

* Indicates set is in working condition

 

 

 

Baird Televisor (1930) *

 

 

 

Baird Copy  (1950?)

 

 

 

Color Mirror Screw Receiver (1933/2007)*

 

 

Daven TV Receiver (1928) *

 

 

 

Daven Tri Standard (1928)

 

 

Fracarro 30 Line (ca 1930)

 

 

General Electric Octagon replica (ca 1950)

 

 

 

Hollis Baird Receiver with Globe Scanner

(1929)

 

 

Hollis Baird C-3-S Shortwave Converter (1930)

 

 

 

Hollis Baird 35 Receiver  (1930)

 

 

Jenkins JD-30 Receiver (1932)

 

 

 

Jenkins 100 (1931)

 

 

 

Mercier 24/45 Line (1928)

 

 

Mercier 60 Line (1929)

 

 

 

Mervyn Mirror Drum (1934)

 

 

 

RCA 60 Line (1931) *

 

 

 

Shortwave Converter (1928)

 

 

 

Western Visionette (1929) *

 

 

 

Western Empire State (1931) *

 

 

 

Daven Equipment (1928)

 

 

 

Jenkins JK-20 TV Reciver Kit Box

 

 

 

Phol Paper Scanning Disk

 

 

 

Radio Television Institute Phototube (1936)

 

 

 

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