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Mullard
Mullard
Limited was a British manufacturer of electronic components. The Mullard
Mullard
Radio Valve Co. Ltd. of Southfields, London, was founded in 1920 by Captain Stanley R. Mullard, who had previously designed valves for the Admiralty before becoming managing director of the Z Electric Lamp Co. The company soon moved to Hammersmith, London and then in 1923 to Balham, London. The head office in later years was Mullard
Mullard
House at 1-19 Torrington Place, Bloomsbury, now part of University College London.

Contents

1 Partnership with Philips 2 Factories

2.1 Mitcham 2.2 Blackburn 2.3 Others

3 Teletext 4 Semiconductors 5 Space science 6 Mullard
Mullard
brand name 7 Z Electric Lamp Company 8 See also 9 References 10 External links

Partnership with Philips[edit] In 1923, in order to meet the technical demands of the newly formed BBC, Mullard
Mullard
formed a partnership with the Dutch manufacturer Philips. The valves (vacuum tubes) produced in this period were named with the prefix PM, for Philips-Mullard, beginning with the PM3 and PM4 in 1926. Mullard
Mullard
finally sold all its shares to Philips
Philips
in 1927. In 1928 the company introduced the first pentode valve to the British market. Factories[edit] Mitcham[edit] Mullard
Mullard
opened a new manufacturing plant at Mitcham, Surrey
Surrey
in 1929. A second building was added in 1936. Both buildings had a very distinctive flat roof construction and were very similar to those at Philips' headquarters in Eindhoven, Netherlands. Co-sited with the Mullard
Mullard
buildings was the manufacturing complex for Philips
Philips
Radios. Mitcham
Mitcham
was also home to the Mullard
Mullard
Application Laboratory. Blackburn[edit] In the late 1930s Mullard
Mullard
opened a new plant in Blackburn, Lancashire. By 1949 Mullard
Mullard
had produced a number of television sets, such as the MTS-521 and MTS-684. In 1951 Mullard
Mullard
was producing the LSD series of photographic flash tubes. Others[edit] Mullard
Mullard
had factories in Southport
Southport
and Simonstone, near Padiham
Padiham
both in Lancashire. The latter closed in 2004. There was also a sister factory at Belmont in Durham (closed in June 2005).[2][3][4][5] Other factories included those at Fleetwood
Fleetwood
(closed in 1979) and Lytham St. Annes (closed in 1972). A feeder factory at Haydock
Haydock
closed in 1981. Teletext[edit] Main article: SAA5050 In the early 1980s, Mullard
Mullard
manufactured the SAA5050, some of the earliest teletext decoding modules made in the UK. Semiconductors[edit] Mullard
Mullard
owned semiconductor factories in Southampton
Southampton
and Stockport. Both sites were owned by NXP Semiconductors
NXP Semiconductors
(formerly Philips Semiconductors). The Southampton
Southampton
site is now closed. The one in Hazel Grove, Stockport specializes in power semiconductor devices. The first transistors produced by Mullard
Mullard
were the OC50 and OC51 point-contact types, which were not widely used. In 1953 Mullard
Mullard
moved to junction transistors, beginning with the plastic-cased OC10 series. These were followed by the glass-encapsulated OC44, OC45, OC70, and OC80 series (the output devices were metal encapsulated to facilitate heatsinking), which were produced in large numbers and copied by other companies, such as Valvo (another Philips
Philips
subsidiary), Intermetall and Siemens in Germany, and Amperex
Amperex
in the USA. RF transistors were the OC170 and OC171. In 1964 the company produced a prototype electronic desktop calculator as a technology demonstrator for its transistors and cold cathode indicator tubes. Space science[edit] In 1957 Philips- Mullard
Mullard
helped to set up the Mullard
Mullard
Radio Astronomy Observatory (MRAO) at the University of Cambridge. In 1966 the Mullard Space Science Laboratory (MSSL) was opened near Dorking, Surrey
Surrey
as part of University College London. The Royal Society
Royal Society
Mullard Award[6][7] for young scientists and engineers was set up in 1967. Mullard
Mullard
brand name[edit] Philips
Philips
continued to use the brand name "Mullard" in the UK until 1988. Mullard
Mullard
Research Laboratories in Redhill, Surrey
Surrey
then became Philips
Philips
Research Laboratories. As of 2007, the Mullard
Mullard
brand has been revived by Sovtek, producing a variant of the ECC83
ECC83
and EL34. Z Electric Lamp Company[edit] The Z Electric Lamp Co. continued business into the 1970s operating from premises in Thornton Heath, South London, manufacturing lamps of specialised design. However, it closed due to the recession in the mid 1970s. See also[edit]

British Valve Association

References[edit]

^ "Mullard". The National Valve Museum. Retrieved 14 January 2017.  ^ " Mullard
Mullard
& CES". Early Philips
Philips
Colour TV. Retrieved 14 January 2017.  ^ Milner, Mark (2 March 2005). "Union says LG Philips
Philips
is to close Durham factory". The Guardian. Retrieved 14 January 2017.  ^ "LG Philips
Philips
closure marks end of an era". The Journal. 23 July 2005. Retrieved 14 January 2017.  ^ Woodcock, Ray (January 2006). "And Then There Were None" (PDF). Philips
Philips
Electronic Pensioners. Retrieved 14 January 2017.  ^ " Royal Society
Royal Society
Mullard
Mullard
Award: Mullard
Mullard
Medallists". Royal Society. London. 2016. Archived from the original on 19 July 2016.  ^ " Mullard
Mullard
Award". Royal Society. Archived from the original on 14 October 2006. 

External links[edit]

Mullard
Mullard
the Blackburn
Blackburn
Vacuum Tubes Factory - YOUTUBE Information Film circa 1960 Mullard
Mullard
Semiconductors by Andrew Wylie Some Mullard
Mullard
History on personal blog History of Mullard
Mullard
Tubes Mullard
Mullard
Valve

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