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221:"kinkless tetrode" (beam power tetrode). In 1922 the company brought out valves using thoriated tungsten filaments, which needed less battery power to operate than former types. During World War II the company developed the CV122 valve used in the
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EMI sold its share of M-OV to GEC in 1956. The company continued to manufacture valves at the Brook Green Works, Hammersmith, London, until 1988. M-OV branded
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for £7,000. Cape mill was used as the main production facility at Shaw, with the adjacent Duke mill remaining mostly unused.
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The Saga of
Marconi-Osram Valve: A History of Valve-making at One of the World's Foremost Enterprises
135:. It was named after the Marconi Company and Osram, which were two major manufacturers of the tube.
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to produce valves and cathode ray tubes. The two mills named Cape and Duke, were bought from the
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Shaw produced a vast array of valves for the war effort, some of which are listed below.
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The company was founded in 1919, when the valve making interests of GEC (Osram) and the
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were combined. In 1929, Marconi sold its interest in the company to the
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for television, starting in the 1930s. The company also introduced the
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valves, continue to be highly prized by enthusiasts of the
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131:(vacuum tubes). It was a subsidiary of the (British)
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http://www.gracesguide.co.uk/Marconi-Osram_Valve_Co
158:In 1939, M-OV acquired two disused cotton mills at
48:. Unsourced material may be challenged and removed.
880:Defunct technology companies of the United Kingdom
698:GEC-Marconi scientist deaths conspiracy theory
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213:Notable products of the company included
108:Learn how and when to remove this message
234:Barry Vyse & George Robert Jessop,
814:This electronics-related article is a
184:VR99, VR100, VR101 and VR103 for the
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46:adding citations to reliable sources
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627:South African Class 9E, Series 2
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417:Associated Electrical Industries
191:TT11 for the TR1143 fighter set.
127:) was a British manufacturer of
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480:Robert Stephenson and Hawthorns
33:needs additional citations for
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875:Electronics industry in London
384:GEC Plessey Telecommunications
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507:Radio & Allied Industries
168:Lancashire Cotton Corporation
895:United Kingdom company stubs
818:. You can help Knowledge by
765:. You can help Knowledge by
133:General Electric Company Ltd
125:Marconi-Osram Valve Company
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333:Marconi Electronic Systems
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612:GEC Stephenson locomotive
448:Siemens Brothers & Co
870:General Electric Company
292:General Electric Company
177:VT104 and VT105 for the
427:British Thomson-Houston
348:Marconi Research Centre
198:used in airborne radar.
162:where it established a
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543:Marconi Communications
495:Willans & Robinson
374:Alenia Marconi Systems
607:British Rail Class 91
453:William Thomas Henley
394:Thomson Marconi Sonar
367:Former joint ventures
323:Hirst Research Centre
57:"Marconi-Osram Valve"
502:Gilbarco Veeder-Root
485:Ruston & Hornsby
465:Dick, Kerr & Co.
443:Metropolitan-Vickers
42:improve this article
522:Yarrow Shipbuilders
389:Matra Marconi Space
343:Marconi-Osram Valve
338:Marconi Instruments
299:Former subsidiaries
151:, a predecessor of
149:Gramophone Company
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98:February 2012
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59: –
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53:Find sources:
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31:This article
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19:
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820:expanding it
813:
767:expanding it
760:
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657:Cyril Hilsum
403:Predecessors
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318:GEC Traction
313:GEC Research
235:
229:Bibliography
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181:transmitter.
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160:Shaw, Oldham
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40:Please help
35:verification
32:
15:
600:Locomotives
538:BAE Systems
433:Edison Swan
379:GEC Alsthom
208:valve sound
859:Categories
662:Hugo Hirst
531:Successors
68:newspapers
569:Computers
188:receiver.
722:Category
576:GEC 2050
562:Products
438:Hotpoint
196:micropup
734:Commons
139:History
82:scholar
650:People
591:OS4000
548:Telent
512:Tracor
422:Birlec
242:
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691:Other
553:Unify
429:(BTH)
353:Osram
194:VT90
186:R1155
179:T1154
89:JSTOR
75:books
816:stub
763:stub
240:ISBN
219:KT66
121:M-OV
61:news
153:EMI
44:by
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