Bell Labs type 175HQ deep-sea telephone repeater tube
date: label: date made
content: ca 1957
name: label: maker
content: Bell Telephone Laboratories. Murray Hill Laboratory
notes: label: Description (Brief)
content: A telephone amplifier tube for underwater cables. Double-ended tube, ceramic bases, T-shaped glass envelope. Five leads emerge from one end, one lead from the other. "PM568" stamped on envelope.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Hallam E. Mendenhall
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1988.0695.38
label: catalog number
content: 1988.0695.38
label: accession number
content: 1988.0695
objectType: label: Object Name
content: Vacuum Tube/Repeater
label: Object Name
content: pentode
physicalDescription: label: Physical Description
content: manufactured (overall style)
label: Physical Description
content: molded (overall production method/technique)
label: Measurements
content: overall: 4 in x 1 1/4 in; 10.16 cm x 3.175 cm