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Description: | 4 electronic valves with metal casing and 7 or 9 pins from base. 3 are cylindrical in shape with 9 pins, one is red and one has inscription printed on the side. The fourth one is shaped, becoming smaller near the top with second inscription printed on the side, underneath the metal paint there is glass. Part of a massive collection of valves in a cardboard box. | License: | http://www.abdn.ac.uk/historic/Copyright_terms_conditions.shtml | Publisher: | ABDNP University of Aberdeen, Natural Philosophy Collection of Historical Scientific Instruments | Rights holder: | 47718 | Temporal: | 1800 | Source: | University of Aberdeen | Creator: | Rogers Electronic Tubes Limited; COSSOR | Identifier: | http://calms.abdn.ac.uk/Geology/dserve.e... | Go to resource |
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