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- Westinghouse Vibrating Rectifier, 1910-1920 -

- 1910-1920
- Collections - Artifact
Westinghouse Vibrating Rectifier, 1910-1920
- Brenkert Motion Picture Projection Rectifier, Model R76, 1920-1939 -

- 1920-1939
- Collections - Artifact
Brenkert Motion Picture Projection Rectifier, Model R76, 1920-1939
- Experimental High Voltage Mercury Rectifier -

- Collections - Artifact
Experimental High Voltage Mercury Rectifier
- Type 226-A High Voltage Half-Wave Rectifier -

- Collections - Artifact
Type 226-A High Voltage Half-Wave Rectifier
- Brenkert Motion Picture Projection Rectifier, Model R76, 1920-1939 -

- 1920-1939
- Collections - Artifact
Brenkert Motion Picture Projection Rectifier, Model R76, 1920-1939
- Water Cooled Transmitting Tube, Used at W8XE Ford Motor Company Radio Station, 1925 - Vacuum tubes appear in older radios, televisions, amplifiers, computers, and other electronic devices. Their function: to amplify and strengthen weak electronic signals. Typical tubes are sealed glass bulbs evacuated of gas, allowing electron flow to be influenced by a cathode, plate and grid. This is a water-cooled version--a necessity to displace the intense heat generated by large, powerful tubes.

- 1925
- Collections - Artifact
Water Cooled Transmitting Tube, Used at W8XE Ford Motor Company Radio Station, 1925
Vacuum tubes appear in older radios, televisions, amplifiers, computers, and other electronic devices. Their function: to amplify and strengthen weak electronic signals. Typical tubes are sealed glass bulbs evacuated of gas, allowing electron flow to be influenced by a cathode, plate and grid. This is a water-cooled version--a necessity to displace the intense heat generated by large, powerful tubes.
- Experimental High Voltage Mercury Rectifier -

- Collections - Artifact
Experimental High Voltage Mercury Rectifier
- Cooper Hewitt Mercury Arc Rectifier Tube, 1927 -

- 1927
- Collections - Artifact
Cooper Hewitt Mercury Arc Rectifier Tube, 1927
- Cooper Hewitt Style 321055 Rectifier Bulb, 1920-1925 -

- 1920-1925
- Collections - Artifact
Cooper Hewitt Style 321055 Rectifier Bulb, 1920-1925
- F.S. McCullough Co. Heliotron Rectifier, Used by Ford Motor Company at Radio Station W8XE in Dearborn, Michigan, 1925 -

- 1925-1926
- Collections - Artifact
F.S. McCullough Co. Heliotron Rectifier, Used by Ford Motor Company at Radio Station W8XE in Dearborn, Michigan, 1925