- Item type
- Object
- Makers
- Ediswan
- Provenance
- Presented by the Marconi Corporation.
- Primary inscriptions
- "MARCONI'S W. T. CO. LTD. / PAT. APPN. No. 28413-19. Q" printed on exterior surface of bulb.
- Object type
- Radio valve
- Dimensions
- Diameter: 25mm Height: 70mm Weight: 0.05kg
- Inventory No
- 31396
- Accession Number
- 2004-9/307
Description
Marconi Radio Valve Type Q, with distinctive wire mesh cage grid. Grid is made of longitudinal wires with interwoven helical wire, all supported on rectangular wire frame. Filament is not clear but is single strand filament running length of valve and tensioned by a spring. With complete filament, and plain metal cylinder anode taken to one of the side connections. Previously catalogued with assorted other valves.
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