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File:強制空冷菅.jpg

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Captions

High power vacuum tubes manufactured by NEC

Summary edit

Description
日本語: 写真中央（8T-11R/強制空冷3極管/1954年/日本電気製）、同左（7F-31R/強制空冷4極管/1960年/日本電気製）、同右（TR-1519/中型三極管/1950年頃/日本電気製） 東京工業大学博物館・百年記念館（2階：電気〜光/通信の先端研究史）所蔵
English: Center of the photo (8T-11R / forced air-cooled triode / 1954 / made by NEC), same left (7F-31R / forced air-cooled quadrupole tube / 1960 / made by NEC), same right (TR-1519 / Medium-sized triode / around 1950 / manufactured by NEC) Tokyo Institute of Technology Museum, Centennial Memorial Hall (2nd floor: History of advanced research on electricity-optical / communication)
Date
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Author Yoit

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current07:27, 21 March 2016Thumbnail for version as of 07:27, 21 March 20162,736 × 3,648 (6.3 MB)Yoit (talk | contribs)User created page with UploadWizard

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