Aircraft landing beam transmitter set
name: label: associated user
content: unknown
label: associated institution
content: Bureau of Standards
notes: label: Description (Brief)
content: NBS# X27, unit includes rheostat BS 38019. A transmitter assembly with a dial on the front graduated from 10 to 200 by tens. On the top is a green General Electric resistance unit (BS R3066A), a Dubilier condenser ("43"), and an adjustable inductance (two copper plates with braided copper leads). On the base is a sliding adjustable resistance coil, a "T" type 711 triple pole, single throw switch (handle is missing). Three horizontal copper-coiled tubes include two (with cloth insulation) connected to a green ceramic fuse block, and one with bare copper connected to a vertical bare copper-wound tube mounted on the bakelite frame. A fixed capacitance ("BS-I-6") is mounted on the fuse block. An asbestos heat-protector pad is mounted to the underside of the top. "27" written on the base. A brass plate with control settings was found with this unit but it's not clear that it actually goes with this piece.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from the United States Bureau of Standards, Dept. of Commerce
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.313590
label: catalog number
content: 313590
label: accession number
content: 188571
label: collector/donor number
content: X27
label: collector/donor number
content: BS 38019
objectType: label: Object Name
content: Transmitter
label: Object Name
content: radio transmitter
label: Other Terms
content: Transmitter; Radio
physicalDescription: label: Measurements
content: overall: 21 in x 17 in x 15 1/2 in; 53.34 cm x 43.18 cm x 39.37 cm