De Forest type H "Oscillion" transmitting triode
date: label: date made
content: ca 1921
name: label: maker
content: De Forest Radio Telephone & Telegraph Co.
notes: label: Description (Brief)
content: De Forest type H "Oscillion" radio tube. No base, BT-shaped glass envelope with tip on top, lead wires emerging from the bottom, and a contact tube on each side below the bulge. Stamped: "De Forest / tube / 2203". Donor card reads: "Triode made by De Forest for amateur use following World War 1. One of the first transmitting tubes definitely designed for use on the higher frequencies being used by amateurs. This tube sold for $18.00. Filament 10 volts at 2.35 amperes, plate 1500 volts at 50 milliamperes. Average out put on the amateur frequencies was 20 to 25 watts.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Paul G. Watson
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.324320
label: catalog number
content: 324320
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube, Triode
label: Object Name
content: triode
label: Other Terms
content: Electron Tube, Triode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 6 1/4 in x 3 1/2 in x 2 1/4 in; 15.875 cm x 8.89 cm x 5.715 cm