U.S. Army Signal Corps American Expeditionary Force field radio transmitter, model WI-193A

U.S. Army Signal Corps / American Expeditionary Force field radio transmitter, model WI-193A

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Usage conditions apply
Description (Brief)
No nameplate. Marked on instruction sheet inside label: "Type WI-193A. Transmitter is a direct coupled coil set, supplied by a 6 volt storage battery and is known as the 'Boy Scout Set'. It draws approximately 5 amperes and supplies approximately.75 amperes to a 5 ohm antenna at wavelengths ranging from 100 to 300 meters. An antenna 75 feet in length is suitable." Label on fixed condenser box: "MICA Condenser / Made by Dubilier Condenser Co., Inc. NY / for Signal Corps, U.S.A. / Pat'd. June 12, 1917 / Other Patents Pending". A portable World War 1 field radio used by the US Army Signal Corps with tuning helix on outside of box. Battery, key, antenna, and counter poise connections located on top panel. Spark gap located inside box with spark coil and condenser. Unit is run from a 6 volt storage battery. Unit restored in 1963.
Currently not on view
Object Name
radio transmitter
Date made
about 1917
date made
ca 1917
Dubilier Condenser Co.
place made
United States: New York, New York City
overall: 20 cm x 16 cm x 20 cm; 7 7/8 in x 6 5/16 in x 7 7/8 in
ID Number
accession number
catalog number
Credit Line
from Franklin Wingard
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Work and Industry: Electricity
Data Source
National Museum of American History
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