Variometer for Armstrong regenerative receiver
date: label: Date made
content: 1912
name: label: maker
content: Armstrong, Edwin Howard
notes: label: Description
content: This is one of two tunable variable condensers used by Edwin Howard Armstrong in his first regenerative radio circuit in 1912. Turning the dial moves a set of plates inside the box in relation to a fixed set of plates. This changes the amount of charge stored in the electrical circuit and allows the listener to alter the received radio frequency.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Marion Armstrong
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.314503.06
label: catalog number
content: 314503.06
label: accession number
content: 202631
objectType: label: Object Name
content: Capacitor, Variable
label: Object Name
content: capacitor
label: Object Name
content: variable condenser
physicalDescription: label: Measurements
content: overall: 7 1/4 in x 7 1/4 in x 7 1/2 in; 18.415 cm x 18.415 cm x 19.05 cm