Date
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Chronology
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Comments and source(s)
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| 1929 |
Reappraisal by Marconi after the BBC granted Baird certain transmission facilities for experimental television |
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| 1929 |
Radio receivers were manufactured by Marconiphone which was subsequently sold to the Gramophone Company |
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| 1930 |
A television research group was established within Marconi to investigate the commercial possibilitiers and to register patents from which useful licence revenue might be derived. |
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| 1931 |
The Gramophone Company became EMI and produced domestic and radio receivers using the Marconiphone trademark. Subsequently, from about 1936, they provided television receivers for the Marconi-EMI system also using the Marconiphone trademark. |
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| 1932 |
The first practical results from the research group were demonstrated when low definition signals were transmitted from Chelmsford to Australia on a wavelength of 26 metres. These tests were carried out with the collaboration of Amalgamated Wireless (Australasia) Ltd.. |
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| 1934 |
Marconi's television interests were merged with those of EMI Ltd in a company called Marconi-EMI Television Co in which Marconi's was responsible for all aspect of transmission |
http://www.gracesguide.co.uk/Marconi's_Wireless_Telegraph_Co |
| 1935 |
A BBC committee of inquiry prompted a side-by-side trial between Marconi's all-electronic television system, which worked on 405 lines to Baird's 240. Marconi won, and in 1937 Baird's system was dropped. |
http://www.bbc.co.uk/history/historic_figures/baird_logie.shtml
Picture of the "head" used by Logie Baird here
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| 1936 |
The Marconi-EMI system was adopted by the BBC for its public high definition television service - the first in the world - broadcasting from Alexandra Palace. |
http://www.gracesguide.co.uk/Marconi's_Wireless_Telegraph_Co |
| 1936 to 1939 |
Only 2000 licences were issued during this period questionning the viability of television |
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| 1939 to 1945 |
Marconi suspended all television developments and focussed on meeting the war effort |
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| 1946 |
The decision was taken to go into production with television studio equipment.
English Electric takeover of Marconi. One of the consequences of this was the reconstitution of the Marconi valve laboratory as the English Electric Valve (EEV) Company.
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| 1947 |
Development started on the image orthicon camera tube |
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| 1948 |
The Marconi-EMI alliance was dissolved. This was primarily due to EMI actively moving into the Marconi home ground - the transmitter market - and became a competitor. |
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| 1948 |
The Broadcasting Division was formed |
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| 1949 |
Marconi demonstrated the world's first public demonstration of 625-line large screen television at the International Television Exhibition in Milan. |
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| 1950 |
The BBC accepted the MkIB camera.
Television spanned the English Channel and the first air-to-ground television broadcast from an aircraft in flight took place. Marconi image orthicon cameras were used on both occasions.
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| 1950 |
The MkII camera was developed for studio use. It included 4-lens turret, an electronic viewfinder and a 3" image orthicon manufactured by EEV. |
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| 1951 |
Marconi equipped the Holme Moss television station with the world's most powerful transmitters |
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| 1953 |
The BBC awarded Marconi the contract to replace the original (1936) transmitter at Alexandra Palace with one providing 200Kw ERP (Effective Radiated Power) which made it the world's most powerful Band I transmitter. |
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| 1954 |
The MkIII camera became available with a 4½" image orthicon based on work being done by RCA. There were major reliability issues and the 3" image orthicon was substituted. The following year the 4½" image orthicon problems were resolved. |
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| 1954 |
The Independent Television Authority (ITA) was set up by the Postmaster General and placed orders on Marconi for three vision transmitters and three sound transmitters operating in Band III. The first of these became operational in Croydon 12 months later. |
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| 1962 |
In July the Telstar satellite was used for a successful broadcast between the USA and UK, followed in the September by a successful experimental colour broadcast. Marconi cameras were used at both ends of the transmission path. |
A History of The Marconi Company by W.J. Baker |
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