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- Fessenden Variable Coupler, Used at Arlington Wireless Station NAA, 1913-1917 -

- 1913-1917
- Collections - Artifact
Fessenden Variable Coupler, Used at Arlington Wireless Station NAA, 1913-1917
- Wireless Towers at Naval Radio Station, Radio, Virginia, circa 1930 -

- circa 1930
- Collections - Artifact
Wireless Towers at Naval Radio Station, Radio, Virginia, circa 1930
- Rotor from Fessenden Rotary Spark Gap, Used at the Naval Wireless Station NAA, Arlington, Virginia, 1913 - This device was part of a system used to amplify the time signal from U.S. Navy station NAA at Arlington, Virginia. Station NAA received a time signal from the Naval Observatory clock via telegraph wire, rebroadcasting it via a powerful transmitter to receivers all over the nation. Americans utilized radio technology to set their clocks to this standardized signal.

- 1913
- Collections - Artifact
Rotor from Fessenden Rotary Spark Gap, Used at the Naval Wireless Station NAA, Arlington, Virginia, 1913
This device was part of a system used to amplify the time signal from U.S. Navy station NAA at Arlington, Virginia. Station NAA received a time signal from the Naval Observatory clock via telegraph wire, rebroadcasting it via a powerful transmitter to receivers all over the nation. Americans utilized radio technology to set their clocks to this standardized signal.
- U. S. Wireless Station, Fort Myer, Virginia, circa 1914 -

- circa 1914
- Collections - Artifact
U. S. Wireless Station, Fort Myer, Virginia, circa 1914
- Transmitter Room of the Naval Wireless Station NAA, Arlington, Virginia, 1912 -

- 1912
- Collections - Artifact
Transmitter Room of the Naval Wireless Station NAA, Arlington, Virginia, 1912