- Television systems before 1940
A number of experimental and broadcast pre
World War II televisionsystems were tested. The first ones were mechanical based ( mechanical TV) and of very low resolution, sometimes with no sound. Later TV systems were electronic ( electronic TV).
* France 1932 (mechanical): 60 lines, 12.5 frame/s, 3:7 vertical
aspect ratio, vertical scanning ~35x60 pixelsper frame, sound, live images
* France 1935: 375 lines, abandoned 1936
* France 1935 (electronic): [441 pixels per frame, sound, talking movies aspect ratio, ~31x30 pixels per frame, movies
* Doberitz 1932 (mechanical): 48 lines, 25 frame/s, 4:3 horizontal aspect ratio, ~64x48 pixels per frame, sound, talking movies
* Berlin R.P.Z. 1932 (mechanical): 60 lines, 25 frame/s, 4:3 horizontal aspect ratio, ~83x60 pixels per frame, test movies and live images
* Germany 1932: 90 lines
* Germany 1935:
* Germany 1939 (
Einheitsempfänger E 1): 441 lines, 25 frame/s, line frequency 11025 Hz. Vision 46.0 MHz Sound 43.2 MHz.
* Germany 1940: 1.000 lines signal projection, no glass screen but projection screen (successful experiments in
Reichspostlabors, but no mass production, note that in Germany public telegraphy, telephone, and radio services were subject to the "Reichspostministerium" since the early 20th century, and TV was regarded a postal issue as well until the 1980s)
* Netherlands 1930s were weird:
441 lines, 25 frame/s, line frequency 11025 Hz
* Late 1940s: 567 lines
* Warsaw 1937 (mechanical): 120 lines, test movies and live images from a studio
* Electronic TV (343 lines) was under development and was publicly demonstrated during the Radio Exhibition in Warsaw in August 1939, regular operations planned to start at the beginning of 1940, work stopped because of the outbreak of World War II.
* Switzerland 1932 (mechanical): 30 lines, 16.6 frame/s, 4:3 horizontal aspect ratio, ~40x30 pixels per frame, test movies and live images
During the 1930s there were also experimental transmissions from the Vatican - but further details are unknown
*Italy 1932 (mechanical): 60 lines, 20 frame/s, 4:3 horizontal aspect ratio, ~45x60 pixels per frame, test movies and live images
*Italy 1937 (electronic): 375 lines, 25 frame/s, 4:3 horizontal aspect ratio, daily from Rome, between 6pm and 9.30pm on 6.9 meters with a power of 2kW
*Italy 1939 (electronic):
441 lines, 25 frame/s, 4:3 horizontal aspect ratio, regular service from Rome and Milan. 2 kW transmission power on VHF 45 MHz
* England 1926 (Baird mechanical): 30 lines, 5 frame/s, black-and-white experimental transmissions
* England 1928 (Baird mechanical): 30 lines, 5 frame/s, first experimental color TV transmissions
* London 1932 (Baird mechanical) : 30 lines, 12.5 frame/s, 3:7 vertical aspect ratio, vertical scanning, ~70x30 pixels per frame, sound, live TV from studio
* England 1936 (Baird): 240 lines, 25 frame/s, line frequency 6000 Hz, used from November 1936 to February 1937
* UK (1936, EMI):
405 lines / 50 Hz. Used from November 1936 to 1985.
** The EMI
405 lines system (1938-1939) was the first to have an ITUSystem Letter Designation.
** The EMI system is officially known as
System-A. As the EMI system predates PAL, there is no PAL designator in the ITU television system table.
* USSR 1932 (mechanical): 30 lines, 12.5 frame/s, 4:3 horizontal aspect ratio, ~40x30 pixels per frame, test movies and live images
* USA 1933: 240 lines
* USA 1936: 343 lines; limited public demonstrations in
New York City( RCA) and Philadelphia( Philco). Field tests in Los Angelesused various line systems, but adopted RCA's 441 linessystem by 1938.
* USA 1938-9: First TV receivers sold on a very limited basis, mostly in New York. Manufactures included
RCA, General Electric, DuMont, and Andrea.
* USA 1937-1941:
441 lines@ 30 f.p.s.(RCA) and 605 lines (Proposed by Philco), both replaced by 525 line System-Mon July 1, 1941 when the Federal Communications Commissionissued the first commercial licenses.
Timeline of the BBC
History of television
Timeline of the introduction of television in countries
Timeline of the introduction of colour television in countries
Geographical usage of television
Moving image formats
Oldest radio station
List of experimental television stations
Oldest television station
Early television stations
Individual television stations
BBC/ BBC Television
Broadcast television systems
Television systems before 1940
Related topics in television systems
Oldest television station
[http://www.xs4all.nl/~aobauer/TV%20E1%201939.pdf (in German) Rolf Wigand: Technische Beschreibung des E 1 (Zeitgenössischer Artikel in „Radio-Mentor", pdf 295 kB)]
[http://bs.cyty.com/menschen/e-etzold/archiv/TV/telefunken/einheitsempfaenger.htm (in German) Eckhard Etzold: Ausführliche Webseite mit vielen Fotos sowie Schaltbild des E 1]
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