Telefunken type EVE173 vacuum triode
date: label: date made
content: 1918
name: label: maker
content: Telefunken
notes: label: Description (Brief)
content: Four-pin base (three banana pins and one hollow post) with metal shell and plastic insulator. Horizontal copper anode, tipless T-shaped envelope. Paper label on base inked: "12-6-18". Donor card reads: "Triode made by Telefunken for the German army in World War 1. Similar in physical aspect with the RE-16-C-11 tube {catalog #324324]. Dates from 1914, made for amplifier use in intercepting telephone communications in the front line trenches.
label: Description (Brief)
content: Used first in an amplifier type "EVE-211". Filament: 2.7 volts at .55 ampere. 80 to 100 volts on the anode. Originally made with a nickel anode and grid ribbon. War shortages in 1918 forced the substitution of chemically treated copper for the nickel. The copper grid and anode will be found in the tube, indicating that it was produced by Telefunken close to the end of WWI. Amplification factor 10; mutual conductance of about 100 microhms; internal resistance about 100000 ohms."
label: Description (Brief)
content: See also: Tyne, "Saga of the Vacuum Tube," pages 250-251; https://www.radiomuseum.org/tubes/tube_eve173.html.
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.324325
label: catalog number
content: 324325
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: 4 3/4 in x 1 3/4 in; 12.065 cm x 4.445 cm