Experimental form of Marconi Company magnetic detector, 1900-1910

Radio Communication

1900-1910

Earliest experimental form of magnetic detector developed by the Marconi Company, with fixed soft iron core and single layer primary coil on core and telephone circuit winding in bobbin surrounding the primary coil, probably made by Marconi's Wireless Telegraphy Company, Chelmsford, Essex, England, 1900-1910

Moulded unprocessed bakelite panel ready for ECME, 1936-1955

Radio Communication

1936-1955

Moulded unprocessed bakelite panel ready for ECME machine metallised on both sides by zinc spraying, probably made by Sargrove Electronics Ltd, Walton-on-Thames, Surrey, England, 1936-1955

MW valve radio receiver

Radio Communication

1939

Mains Minor MW valve radio receiver, made by Ferguson Radio Corporation Ltd, c. 1939.

Filing coherer, glass tube, fitted on to mounting bracket with terminals, 1894-1904

Radio Communication

1894-1904

Filing coherer, glass tube fitted on to mounting bracket with terminals, designed or used by Sir Oliver Lodge, England, 1894-1904

V2A Marconiphone receiver (long-range model) , 1922-1924

Radio Communication

1922-1924

V2A Marconiphone receiver, long-range model, chassis manufactured by Plessey Company Limited, radio manufactured by Marconiphone Company Limited, Chelmsford, Essex, England, 1922-1924

Radio Times volume 1 No. 1, 1923

Radio Communication

1923

Radio Times volume 1 No. 1, produced by the British Broadcasting Company and published by George Newnes Limited, England, 1923

microphone from 'Oscar One' CB transceiver, 1980-1983

Radio Communication

1980-1983

Microphone from `Oscar One' 27 MHz f.m. CB mobile/base radio transceiver, manufactured by South Midlands Communications Limited, Eastleigh, Hampshire, England, 1980-1983

Home made 30-line televisor, 1934

Radio Communication

1934

Home made 30-line televisor, made by Robert (Bob)Albert Lampitt, Wolverhampton, England, 1934.

Spark gap or knob coherer, 1889

Radio Communication

1889

Spark gap or knob coherer, unknown maker, England, 1889. Used by Sir Oliver Lodge to first show the coherer effect and detect electric surgings by closing the circuit of a galvanometer during experiments on lightning guards.

Experimental form 1 (Licence to use Wireless Telegraph), 1905

Radio Communication

1905

Experimental form 1 (Licence to use Wireless Telegraph for Experimental purposes) dated 14 November 1905 and made out to Ernest Dundas Gledall Esq BSc, issued by the General Post Office on behalf of the Postmaster General, British, 1905

Ampex videotape recorder type VR 1000A

Radio Communication

Ampex videotape recorder, type VR 1000A, serial number 329. Since television signal contained frequencies up to about 5MHz, the speed at which the tape passed the head must also be very high – much higher in fact than the speed at which it was practicable or economical to move the tape from reel to reel. In the case of the Ampex VR1000, this problem was solved by causing the four heads to sweep rapidly across the tape, whilst running the tape at only 38cm/sec. In this way, the signal was recorded as a series of narrow tracks across the tape, the head-to-tape speed being about 100 times higher than the forward speed of the tape. The heads were carried on a rapidly spinning wheel. The double bay of equipment with the console contained control equipment necessary to ensure a steady picture: servo-mechanisms and their associated electronics for controlling the speed of tape movement and head-wheel rotation and the means of switching the replay signals from one head to another as the wheel rotated.

Wireless World Diary, 1933

Radio Communication

1933

'Wireless World' diary for 1933, published by Iliffe and Sons Limited, City of London, England, 1933

two-valve short wave radio - telephonic receiver, 1927

Radio Communication

1927

Two-valve, short wave radio - telephonic receiver, made for the Science Museum by Frederick H Walker, Walton-on-Thames, Surrey, England, 1927

Murphy 14-inch Band I/Band III television receiver, 1954

Radio Communication

1954

Murphy 14-inch Band I/Band III television receiver, Model V240, made by Murphy Radio Limited, Welwyn Garden City, Hertfordshire, England, 1954

antenna tuner from 'Oscar One' transceiver, 19801-983

Radio Communication

1980-1983

CB antenna tuner 100TU27 from `Oscar One' 27 MHz f.m. CB mobile/base radio transceiver, manufactured by South Midlands Communications Limited, Eastleigh, Hampshire, England, 1980-1983

aerial inductances, 1901

Radio Communication

1901

Four aerial inductances, wired together, used in Newfoundland in series with the balloon and kite aerials for tuning to the Poldhu (Cornwall) transmitted wavelength for the first wireless communication across the Atlantic, probably made by Marconi's Wireless Telegraphy Company, Chelmsford, Essex, England, December 1901

Coherer, ebonite, with adjustable contacts, 1890-1896

Radio Communication

1890-1896

Ebonite coherer with adjustable contacts, unknown maker, British, 1890-1896. Used in August 1896, in experiments carried out by Captain Henry Jackson

Iron borings coherer (Branly type), 1894

Radio Communication

1894

Iron borings coherer (Branly type), probably made by Oliver Lodge, England, 1894. Mounted on wooden baseboard.

low-pass filter from 'Oscar One' CB transceiver, 1980-1983

Radio Communication

1980-1983

CB low-pass filter 100LP30 from `Oscar One' 27 MHz f.m. CB mobile/base radio transceiver, manufactured by South Midlands Communications Limited, Eastleigh, Hampshire, England, 1980-1983

Model of open oscillator with spherical radiators used by Heinrich Hertz, 1949

Radio Communication

1949

Model (scale 1:4) of open oscillator with spherical radiators used by Heinrich Hertz, Science Museum Workshops, South Kensington, London, England, 1949

'Radio Celebrities Second Series' cigarette card album, 1934-1940

Radio Communication

1934-1940

'Radio Celebrities Second Series' cigarette card album, manufactured by Imperial Tobacco and distributed under the brand name W D and H O Wills and Company, probably Bristol, England, 1934-1940

moulded unprocessed Bakelite panel ready for ECME, 1936-1955

Radio Communication

1936-1955

Moulded unprocessed bakelite panel ready for ECME (Electronic Circuit Making Equipment) machine, probably made by Sargrove Electronics Limited, Walton-on-Thames, Surrey, England, 1936-1955.

Models of three wooden prisms used by Heinrich Hertz, 1949

Radio Communication

1949

Models (scale 1:4) of three wooden prisms used by Heinrich Hertz, made by the Science Museum Workshops, South Kensington, London, England, 1949

Flat steel-spring (or watch-spring) coherer, 1894

Radio Communication

1894

Flat steel-spring (or watch-spring) coherer, unknown maker, England, 1894. Used by Oliver Lodge in his lecture before the Royal Institution on 1 June 1894 on ‘The work of Hertz and his successors’

Burndept 'Ethodyne' superheterodyne receiver, 1926

Radio Communication

1926

Burndept 'Ethodyne' superheterodyne receiver, with two frame aerials, made by Burndept Limited, probably Blackheath, London, England, 1925

'Cat's whisker' Crystal Radio

Radio Communication

1920-1925

'Cat's whisker' crystal radio set with single headphone and original crystal, made by the Scientific Wireless Company, Manchester, and purchased in 1924-25.

Coherer, coarse iron turnings, 1894-1904

Radio Communication

1894-1904

Coherer, coarse iron turnings in glass tube with brass caps with screw terminals at ends, designed or used by Sir Oliver Lodge, England, 1894-1094

BBC GMR mug

Radio Communication

BBC GMR (Greater Manchester Radio) mug.

radio

Radio Communication

c.1944

Wartime utility AC four valve radio set, c.1944.

A-52 Murphy Radio Receiver, 1938-1939

Radio Communication

1938-1939

A52 Murphy Radio Receiver, made by Murphy Radio Limited, Welwyn Garden City, Hertfordshire, England, introduced 1938

Dansette radiogram

Radio Communication

Dansette radiogram

Gecophone broadcast receiver, model B.C 3200, 1924

Radio Communication

1924

Gecophone broadcast receiver, model B.C 3200, made by the General Electric Company Limited, England, 1924

Marconi 1.5kW transmitter used by 2LO

Radio Communication

1922

Marconi 1.5kW transmitter, Marconi Company Limited, Chelmsford, 1922. Used by the BBC London station 2LO between 1922 and 1925, as rebuilt c.1954 incorporating some non-original but contemporary components

One loose-coupled tuning inductance with crystal d

Radio Communication

One loose-coupled tuning inductance with crystal detector.

Model of wire screen in octagonal frame used by Heinrich Hertz, 1949

Radio Communication

1949

Model (scale 1:4) of wire screen in octagonal frame used by Heinrich Hertz, made by the Science Museum Workshops, South Kensington, London, England, 1949

'Channel' Band III television converter, type C2, 1955-1960

Radio Communication

1955-1960

'Channel' Band III television converter, type C2, s/n2337, made by Channel Electronic Industries, Burnham on Sea, Somerset, England, 1955-1960

Clockwork interruptor, once owned by David Hughes, 1875-1880

Radio Communication

1875-1880

Clockwork interruptor made and used by David Edward Hughes (1831-1900), England, c. 1879

Original wheel or steel-disc coherer, 1902

Radio Communication

1902

Original wheel or steel-disc coherer (thin-film detector), made by E E Robinson, England, 1902. Made for Oliver Lodge and Alexander Muirhead

Bas-relief head and shoulders of Guglielmo Marconi, 1903

Radio Communication

1903

Bas-relief head and shoulders of Guglielmo Marconi on brass lamina, engraved "1903, R. Bravi, Milano", made by R Bravi, Milano, Italy, 1903

Telstar maser assembly with magnet, 1962-1967

Radio Communication

1962-1967

Telstar maser assembly with magnet, made by Mullard Research Laboratories, Redhill, Surrey, England, 1962-1967

Billi condenser used for aerial tuning in Newfoundland, 1901

Radio Communication

1901

Billi condenser, or adjustable receiving capacitor, used for tuning the aerial in Newfoundland for the first wireless communication across the Atlantic, probably made by Marconi's Wireless Telegraphy Company, Chelmsford, Essex, England, December 1901.

Models of two parabolic zinc reflectors used by Heinrich Hertz, 1949

Radio Communication

1949

Model (scale 1:4) of two parabolic zinc reflectors used by Heinrich Hertz, one with oscillator and the other with resonator, made by the Science Museum Workshops, South Kensington, London, England, 1949

Voigt condenser microphone

Radio Communication

1920-1940

Voigt condenser microphone, probably made by Voigt Patents Limited, Sydenham, London, England, 1920-1940.

Receiving ‘jigger’ used by the Marconi Company, 1898

Radio Communication

1898

Receiving ‘jigger’ or oscillation transformer, single layer primary and secondary coils (split), used by the Marconi Company, probably made by Marconi's Wireless Telegraphy Company, Chelmsford, Essex, England, 1898

part of Rugby transatlantic telephone transmitter, 1927-1956

Radio Communication

1927-1956

Part of Rugby transatlantic telephone transmitter, made by Standard Telephones and Cables, New Southgate, England, 1927

Silicon crystal for wireless telegraphy, mounted in a locket, 1906-1916

Radio Communication

1906-1916

Silicon crystal for wireless telegraphy, mounted in a locket, unknown maker, England, 1906-1916

BBC printing stamp

Radio Communication

1922-1924

BBC printing stamp issued to the Willesden Wireless Company, British, 1922-1924.

Crystal set with Braille dial markings, 1929-1935

Radio Communication

1929-1935

Crystal set with Braille dial marking, supplied by the British Wireless for the Blind Fund and made by Burne-Jones and Company, London, England, 1929-1935.

Brownie crystal receiver and pair of Lissen headphones, 1924-1927

Radio Communication

1924-1927

Brownie crystal receiver and pair of Lissen headphones, made by the J W B Wireless Company and Lissen Limited, London, England, 1924-1927

mini SWR bridge from 'Oscar One' CB transceiver, 1980-1983

Radio Communication

1980-1983

CB mini SWR bridge S3-30L from `Oscar One' 27 MHz f.m. CB mobile/base radio transceiver, manufactured by South Midlands Communications Limited, Eastleigh, Hampshire, England, 1980-1983