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Aircraft Spark Transmitter - Wireless Transmitter No.1, circa 1918 Object Reg. No: ST 021661

Summary:
Aircraft type transmitter used by the Royal Flying Corps and Australian Flying Corps during World War I. These transmitters were installed in two-seat reconnaissance aircraft such as the RE.8 used to spot German artillery and troop concentrations and call in artillery fire by morse message. A long 120 foot wire aerial on a reel had to be wound out by the observer to enable transmissions to be sent on the 100-260 metre wavelength. Power was provided by a 6-volt wind powered accumulator providing an output of 30-40 watts.
Description:
Rectangular wooden box with hinged ebonite lid. A spiral inductor is mounted on the lid along with four terminals and two moveable clips. A window on one side allows viewing of the spark gap. Instrctions are glued to bottom of box. Clipped to inside of box is abrasive stone for cleaning contacts and the gap, spare spark gap, and a spanner.
Acquisition Information:
Donation from R. St. Clair, 1941
Discipline: Technology
Dimensions: 110 mm (Height), 190 mm (Width), 160 mm (Length)

More information

Tagged with: world war i 1914-1918, morse code, military communication, air forces, transmitters
Themes this item is part of: Information & Communication Collection, Transport Collection, Radio from sparks to valves, 1914 - 1920
Primary Classification: COMMUNICATIONS
Secondary Classification: Radio
Tertiary Classification: transmitters
Inscriptions: Side of box: SIGNAL CORPS, U.S. ARMY. / AIRPLANE RADIO TELEGRAPH / TRANSMITTING SET BOX / TYPE BC-15A / ORDER No 140274. DATE AUG. 22, 1918 / MADE BY / CONNECTICUT TELEPHONE & ELECTRIC COMPANY
Top panel adjacent to terminals from left to right: - BATTERY KEY + COUNTERPOISE ANTENNA
Inside box - sheet: Operating Instructions for Airplane Radio Telegraph Transmitting Set, Type SCR 65-A / (text and diagrams)
Inside box - abrasive stone: No. 53(?) MEDIUM INDEX / MADE IN USA
Place & Date Used: France, 1914-1918
Manufacturer: Connecticut Telephone & Electric Company, Connecticut, United States, circa 1918

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