Murdock variable condenser for Armstrong regenerative receiver

Murdock variable condenser for Armstrong regenerative receiver

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Description
This variable condenser was used by Edwin Howard Armstrong for his first regenerative radio circuit in 1912. Manufactured by Murdock Radio Co., the condenser stores an electric charge between intermeshed metal plates. The amount of charge stored can be varied by sliding one set of plates further into the unit.
Location
Currently not on view
Object Name
Capacitor, Variable
capacitor
variable condenser
Other Terms
Capacitor, Variable; Radio
Date made
1912
associated user
unknown
associated person
Armstrong, Edwin Howard
maker
Murdock Radio Co.
Measurements
overall: 5 in x 12 in x 3 3/4 in; 12.7 cm x 30.48 cm x 9.525 cm
ID Number
EM.314503.02
catalog number
314503.02
accession number
202631
Credit Line
from Marion Armstrong
See more items in
Work and Industry: Electricity
Data Source
National Museum of American History
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