U.S. Navy / GE type SE-1605-B RF-AF amplifier

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.

Date Made: 1918Associated Date: 1918

Maker: General Electric Company

Location: Currently not on view

See more items in: Work and Industry: Electricity

Exhibition:

Exhibition Location:

Credit Line: from John B. Brady, thru Mrs. John B. Brady

Data Source: National Museum of American History

Id Number: EM.321932Catalog Number: 321932Accession Number: 245709Collector/Donor Number: R1762

Object Name: Amplifierradio amplifierOther Terms: Amplifier; Radio

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

Guid: http://n2t.net/ark:/65665/ng49ca746ae-2511-704b-e053-15f76fa0b4fa

Record Id: nmah_709766

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