N.V. Gloeilampenfabriek Radium type W20 "Radio-Record" ballast tube
notes: label: Description (Brief)
content: A plastic 3-pin base, banana pins, tipless S-shaped envelope with taper at neck. Four-legged metal filament with crimp connectors, 2 upper and 3 lower support hooks. Stamped: "Radio-/ecord / W 20 / 152". Maker: N.V. Gloeilampenfabriek Radium of Holland used the brad name Radio-Record. A current regulator for a power-supply unit. References: Tyne: "Saga of the Vacuum Tube, page 426-427; https://www.radiomuseum.org/tubes/tube_w20_record.html.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.315565
label: catalog number
content: 315565
label: accession number
content: 216300
label: collector/donor number
content: 5m-52
objectType: label: Object Name
content: Ballast
label: Object Name
content: resistance
label: Object Type
content: ballast
label: Other Terms
content: Ballast; Resistance
physicalDescription: label: Measurements
content: overall: 3 3/4 in x 1 3/4 in; 9.525 cm x 4.445 cm