Sterling spark transmitter, No. 1, by W. D. Wireless Factory, Soho, London, England, 1915-1918. The Sterling tuned spark gap wireless transmitter operated on the frequency range of 100-260 metres. The transmitter's output of 30-40 Watts fed to the 120 feet of trailing aerial gave it an operating range of 8-10 miles. The set was usually mounted on a tray on the side of the aircraft fuselage. The trailing aerial of stranded copper wire with a 3Ib weight on the end was spooled out either from the side of aircraft fuselage alongside the wireless set or through an insulated gland in the floor. Sterling spark transmitter, No. 1, 1915-1918. 1915-1918
Sterling spark transmitter, No. 1 for airborne wireless, England, 1915. Almost identical to 1939-311 Sterling spark transmitter, No. 1, by W. D. Wireless Factory, Soho, London, England, 1914-1918 but lacking ammeter on top. The Sterling tuned spark gap wireless transmitter operated on the frequency range of 100-260 metres. The transmitter's output of 30-40 Watts fed to the 120 feet of trailing aerial gave it an operating range of 8-10 miles. The set was usually mounted on a tray on the side of the aircraft fuselage. The trailing aerial of stranded copper wire with a 3Ib weight on the end was spooled out either from the side of aircraft fuselage alongside the wireless set or through an insulated gland in the floor. Sterling spark transmitter 1915