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ARCTURUS No 127, 1929

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ARCTURUS No 127, 1929

Triode, indirectly heated, with 5 pin Base.
The blue colour was used as a trade mark of the Arcturus Radio Tube Company.

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2007 The Museum of Technology, The Great War and WWII
Company registered in England No. 7452160, Registered Charity No. 1140352, Accredited Museum No. 2221