Lansdale / Philco type 7C7 vacuum pentode
date: label: date made
content: ca 1939
name: label: maker
content: Lansdale Tube Company
notes: label: Description (Brief)
content: An 8-pin metal base with center post, tipless T-shaped envelope. Stamped on envelope: “Philco / Made in U.S.A.” Donor’s card reads: “Twin-diode high-Mu triode made by Lansdale Tube Co. for the Philco Corporation. Glass lock-in type, used as combination detector, amplifier, and AVC tube. Heater type: 6.3 volts at .15 amperes.” Donor may have been in error identifying this as a triode.
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.324679
label: catalog number
content: 324679
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube, Triode
label: Object Name
content: pentode
label: Other Terms
content: Electron Tube, Triode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 2 5/8 in x 1 1/8 in; 6.6675 cm x 2.8575 cm