Operating Keys
name: label: Collection Creator
content: Clark, George Howard, 1881-1956
setName: label: See more items in
content: George H. Clark Radioana Collection
unitdate: label: Date
content: 1843-1949
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
identifier: label: Identifier
content: NMAH.AC.0055, Series 26
objectType: label: Type
content: Archival materials
scopecontent: label: Scope and Contents note
content: Series 26 consists of photographs; blueprints; reports; general data; drawings; descriptions; main sending key; relay keys, such as the Massie relay key; combined hand and relay key; relay control key; resistances, reactances, aluminum cells, etc. to reduce sparking at key contacts; and sample of tape perforated by Kleinschmidt perforator for use with the high speed automatic transmitter.