- Item type
- Object
- Makers
- Royal Ediswan
- Provenance
- Presented by the Marconi Corporation.
- Primary inscriptions
- "Royal Ediswan" printed on exterior surface of bulb.
- Object type
- Radio valve
- Dimensions
- Height: 120mm Width: 100mm Depth: 103mm
- Inventory No
- 67148
- Accession Number
- 2004-9/579
Description
4 Volt Fleming Valve, in polished teak? gallows mounting. With ebonite panel and metal alloy terminal upon upper surface of gallows. With two metal alloy terminals upon upper surface of base. Bulb has vertically-mounted nickel anode and other metal components. Previously catalogued with other, similar 12 Volt Fleming Valve (Inv. Num. 89342)
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12 Volt Fleming Valve, by Royal Ediswan, London, c. 1905Inventory Number 77499
4 Volt Fleming Valve, by Royal Ediswan, London, c. 1905Inventory Number 93660
4 Volt Fleming Oscillation Valve, by Royal Ediswan, London, c. 1905Inventory Number 21763
12 Volt Fleming Valve, by Ediswan, London, c. 1905Inventory Number 89342