U.S. Navy GE type SE-1605-B RF-AF amplifier
U.S. Navy / GE type SE-1605-B RF-AF amplifier
Previous
Next
Usage conditions apply
- Description (Brief)
- Marked: "Radio-Audio Frequency / Amplifier / (6 step) / Range: 600-2300 Meters / Made for Navy Dept. (Bu.S.E.) / by / General Electric Co., U.S.A. / 1918 / Type SE.1605.B Serial No. 232 G"; also: "R1762". Unit is a RF-AF amplifier and detector employed by Lowell and Dunmore in their early experiments with alternating current receivers at the Bureau of Standards. The 1605-B was also employed with the French multiple tuner (catalog number 321934) as the RF tuning section. A loop antenna-variable capacitor combination was also used as the tuner on occasion. The circuitry is essentially a 3-stage RF amplifier followed by a grid-leak detector and two transformer-coupled audio stages. Moorhead triodes were apparently used in Navy type sockets. Two filament rheostats and a stabilizer control are provided on the panel. Lid has 3 screens for observing tube filaments. Reference: Clark Collection SRM 51-166, Wiring Diagram and Picture. US Patent Office: "Record and Testimony on Behalf of Lowell and Dunmore" (1928), pages 548-549, 500-501.
- Location
- Currently not on view
- Object Name
- Amplifier
- radio amplifier
- Other Terms
- Amplifier; Radio
- date made
- 1918
- associated date
- 1918
- maker
- General Electric Company
- Measurements
- overall: 8 3/4 in x 13 in x 5 3/4 in; 22.225 cm x 33.02 cm x 14.605 cm
- ID Number
- EM.321932
- catalog number
- 321932
- accession number
- 245709
- collector/donor number
- R1762
- Credit Line
- from John B. Brady, thru Mrs. John B. Brady
- See more items in
- Work and Industry: Electricity
- Data Source
- National Museum of American History
Nominate this object for photography.
Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.
If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.
