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Submarine repeater valve, 1950-1960

1950-1960

Bright's bell telegraph, 1855

1855

C.W. transmitter/receiver, Mk.1, 1917

1917

Linear motor

1948

Solartron oscilloscope model CD568

1955-1961

Photomultiplier with base

1965-1968

Thermopile used to measure heat production, England, 1930-1940

1930-1940

Part of Ground station for German radiosonde

Demonstration radiation monitor type 1187A

1955-1970

Aircraft radio telephony transmitter, complete with round valve and microphone, 1915

1915

Bibby recorder Mark II, Met Ref No 985, MO 22/51, demonstration model, with perspex cover

1951

Part of Ground station for German radiosonde

Part of Ground station for German radiosonde

Sterling spark transmitter and key for use on aircraft, c.1915

1915

Marconiphone Model 701 television receiver

1936
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
Periscopic bubble aircraft sextant, Type 1A, No. 2053, by Kelvin and Hughes (Aviation) Limited, Barkingside, Essex, England, 1950-1951. The periscopic bubble aircraft sextant was used on the De-Havilland Comet passenger jet aircraft.

Periscopic bubble aircraft sextant: Type 1A, No. 2053

1950-1951
Bibby recorder MK II, Met Ref 985, MO 41/51

Bibby recorder MK II, Met Ref 985, MO 41/51

Dental X-ray machine, used in chiropody, with fully articulated arm, by Watson, English, 1930-1950

Dental X-ray machine

1930-1950
Linear gate and integrator (counter), in an equipment shelf, containing five units, including three summing amplifiers, one particle identifier and a counting unit. Equipment shelf by Fleming Instruments Limited, Stevenage, Hertfordshire, England. Linear gate by EMI Electronics Limited, British. All other objects by C. H. & K. Limited, British, 1955-1975

Linear gate and integrator (counter)

1955-1975
Tall radiosonde, improbably described as a rocket sonde (insufficiently robust)

Tall radiosonde

1959