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Description: | VS 68 10E/11442 MADE IN ENGLAND BY THE M.O. VALVE CO. LTD. GEC 90 7757 AM (acid etched on the glass and picked out in white). 4775 66 (writen in black on the glass elememt support). MANU Marconi Osram Valve Company Limited. circa 1960 Osram Works, Hammersmith, London, England. DES after Siemens & Halske. 1922 Berlin, Germany. This Marconi Osram Stabilovolt VS 68 is an Air Ministry multi gap voltage stabilser valve. It has a directly heated cathode. The heaviness of the valve is due to the electrodes and the ceramic base; to which they are attached. The cathode is the outer domed electrode that covers three inner domed and a final solid set of four anodes, numbered 1-4 from the outermost, in Russian doll style. The anode voltages were reputedly 280V, 210V, 140V and 70V. The valve is mounted on a five pin B5 base.
This type of "Stabilivolt" device was originally designed by Siemens & Halske for x-ray equipment where low amperage current of over 200kv was required.
The technology for this type of valve was imported from Germany and valves of this type were manufactured under licence by Marconi from 1937 onwards. | License: | http://www.hmag.gla.ac.uk/spirit/rights/ | Publisher: | Hunterian Museum and Art Gallery, University of Glasgow | Rights holder: | Hunterian Museum and Art Gallery, University of Glasgow | Subjects: | SCIENTIFIC COLLECTION : | Source: | Hunterian Museum | Creator: | Hunterian Museum and Art Gallery, University of Glasgow | Identifier: | http://www.huntsearch.gla.ac.uk/cgi-bin/... | Language: | en-GB | Go to resource |
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