Welsh type WT501 "Peanut" triode
date: label: date made
content: ca 1923
notes: label: Description (Brief)
content: A "Welsh Peanut Tube" in a 4-pin (short) socket adapter. A brass candelabra bayonet base with two contacts, glass insulator, a red-insulated lead emerging from the base shell, and a green-insulated wire coiled around the neck of the tipped tubular envelope. The red lead is attached to one connector on the adapter, both ends of the green insulator are attached to the other connector. Stamped on shell: "Welsh / W. T. 501". Distributed by Radio Research Guild, made by Welsh Electric Lamp Corp, Reference: https://www.radiomuseum.org/dsp_hersteller_detail.cfm?company_id=12236; and Tyne, "Saga of the Vacuum Tube," page 365.
label: Description (Brief)
content: Maker is uncertain, this may have been made by a licensee. Donor card reads: "Triode made by Radio Research Guild, Newark, N.J. in 1923 and was known as the "Welsh peanut" tube. The tube itself contains a filament and a grid. Plate is added by the user by wrapping turns of wire around the envelope. Mounted in a double contact bayonet base, filament connected to the shell and one contact, the grid to the other contact. This tube is the result of several patent litigations dealing wit triode tubes in general. Made available when conventional tubes were in very short supply. Very inefficient requiring a very high plate voltage."
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.324337
label: catalog number
content: 324337
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: 2 1/2 in x 1 1/2 in; 6.35 cm x 3.81 cm
label: Measurements
content: tube only: 2 1/8 in x 3/4 in; 5.3975 cm x 1.905 cm
label: Measurements
content: socket only: 1 in x 1 1/2 in; 2.54 cm x 3.81 cm