U.S. Navy / National model CN 1215 wavemeter and Kolster decremeter
date: label: date made
content: 23 May 1918
label: date made
content: 1918-05-23
name: label: maker
content: National Electrical Supply Company
notes: label: Description (Brief)
content: Marked: nameplate reads: "Radio Wavemeter and Kolster Decremeter / Made for Navy Dept. (BU. S.E.) by / National Electric Supply Co. / Washington, D.C. / Req. 1702 N.S.A. Cont. 36904 5-23-18 / Type CN1215 Serial No. 111 / [lambda] 100-3500 meters". Navy wavemeter and Kolster decremeter with cover. Main tuning control is calibrated in four sections from 100-3500 meters. (100-260, 250-600, 550-1400, 1300-3500 meters) Vernier scale has a .30-0-.30 calibration (S1 and S2), current squared meter has 0-100 scale, other panel controls include a buzzer, buzzer battery, crystal detector (xtal missing), three way switch for detector, meter, and buzzer. Four plug-in coils are used, three are mounted in top of the unit. Ref: Clark Collection: class 2, book 1. Navy Type Nos., 1918.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Franklin Wingard
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.320732
label: catalog number
content: 320732
label: accession number
content: 241556
objectType: label: Object Name
content: Wavemeter, Radio
label: Object Name
content: wavemeter
label: Other Terms
content: Wavemeter, Radio; Measuring Devices
physicalDescription: label: Measurements
content: overall: 10 1/2 in x 16 in x 8 1/2 in; 26.67 cm x 40.64 cm x 21.59 cm