High frequency sliding inductance on wood base, 1900-1950
1900-1950
Wooden pillar insulators, 1900-1950
1900-1950
Stud field regulator, 1900-1950
1900-1950
Copper busbars and ebonite insulators, 1900-1950
1900-1950
Rotary convertor, 1900-1950
1900-1950
Guard lamps on wooden board, 1900-950
1900-1950
Aerial tuning inductance, 1900-1950
1900-1950
Iolanda transformer in wooden box, 1900-1950
1900-1950
Low frequency iron core inductance, 1900-1950
1900-1950
Tuning indicator with lamp, 1900-1950
1900-1950
High-frequency chokes, 1900-1950
1900-1950
BBC L1 lip microphone, 1937-1960
1937-1960
'MPB' call sign plaque, 1900-1950
1900-1950
Billi condenser used for aerial tuning in Newfoundland, 1901
1901
Experimental form of Marconi Company magnetic detector, 1900-1910
1900-1910
Aerial inductances, 1901
1901
Experimental transmitting ‘jigger’ used by the Marconi Company, 1899
1899
Receiving ‘jigger’ used by the Marconi Company, 1899
1899
Marconi multiple tuner, serial number 6305, 1900-1950
1900-1950
Magnetic key relay, 1900-1950
1900-1950
Fixed gap discharger, 1900-1950
1900-1950
Coil type testing buzzer, 1900-1950
1900-1950
Brass earth arrester plates, 1900-1950
1900-1950
V2A Marconiphone receiver (long-range model) , 1922-1924
1922-1924
Stud motor starter, 1900-1950
1900-1950
Buzzer key, 1900-1950
1900-1950
Secrecy notice for telegrams, 1900-1950
1900-1950
Main transmitting condenser in wooden case, 1900-1950
1900-1950
Marconi-Sykes magnetophone
1923
Main part of Marconi 1.5KW transmitter from 2LO
1922-1925
Savoy Hill 'Meat Safe' microphone stand
1923
Wave shortening condenser in wood case, 1900-1950
1900-1950
Picture and waveform monitor and camera control chassis for the Marconi Mk II television camera, 1950-1955
1950-1955
Billi condenser used for aerial tuning in Newfoundland, 1901
1901
Receiving ‘jigger’ used by the Marconi Company, 1898
1898
Horseshoe magnet and keep used with experimental form of magnetic detector, 1900-1910
1900-1910
Bridge telephone, 1900-1950
1900-1950
Daily Herald Photograph: Viola making
1954-05-29
BBC ribbon microphone
circa 1945
Glass tube of smallest balls made for ball-bearings
1945
Marconi 1.5kW Transmitter used by 2LO
1922
Steel Iolanda switchboard, with light bulb and shade
1900-1950
Low-power 'A' unit from 50KW m.f. transmitter
1929
Loop aerial type 2469B, serial no.939
1960-1963
Crompton 6" voltmeter no.179- c.1882, 0 - 300v.
circa 1882
Adler tube amplifier, ZETA
1961
Centre-zero moving-coil galvanometer marked Harris
1943-1980
Centre-zero moving-coil galvanometer sold by Philip Harris Ltd.
1943-1980
Experimental magnetic detector, 1900-1902
1900-1902
Crompton Parkinson A C test meter set
1926