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
'MPB' call sign plaque, 1900-1950
1900-1950
Billi condenser used for aerial tuning in Newfoundland, 1901
1901
Receiving ‘jigger’ used by the Marconi Company, 1899
1899
Aerial inductances, 1901
1901
Experimental form of Marconi Company magnetic detector, 1900-1910
1900-1910
BBC L1 lip microphone, 1937-1960
1937-1960
Experimental transmitting ‘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
Bridge telephone, 1900-1950
1900-1950
Coil type testing buzzer, 1900-1950
1900-1950
Brass earth arrester plates, 1900-1950
1900-1950
Stud motor starter, 1900-1950
1900-1950
Buzzer key, 1900-1950
1900-1950
Wave shortening condenser in wood case, 1900-1950
1900-1950
Main transmitting condenser in wooden case, 1900-1950
1900-1950
Main part of Marconi 1.5KW transmitter from 2LO
1922-1925
Picture and waveform monitor and camera control chassis for the Marconi Mk II television camera, 1950-1955
1950-1955
V2A Marconiphone receiver (long-range model) , 1922-1924
1922-1924
Secrecy notice for telegrams, 1900-1950
1900-1950
Receiving ‘jigger’ used by the Marconi Company, 1898
1898
Savoy Hill 'Meat Safe' microphone stand
1923
Horseshoe magnet and keep used with experimental form of magnetic detector, 1900-1910
1900-1910
Billi condenser used for aerial tuning in Newfoundland, 1901
1901
Marconi-Sykes magnetophone
1923
Steel Iolanda switchboard, with light bulb and shade
1900-1950
Crompton Parkinson A C test meter set
1926
Astatic Current Indicator (No 615) marked 'Crompton's patent' maded by R E Crompton & Co
circa 1878-1927
Crompton 6" voltmeter no.179- c.1882, 0 - 300v.
circa 1882
Centre-zero moving-coil galvanometer marked Harris
1943-1980
Centre-zero moving-coil galvanometer sold by Philip Harris Ltd.
1943-1980
Glass tube of smallest balls made for ball-bearings
1945
BBC ribbon microphone
circa 1945
Daily Herald Photograph: Viola making
1954-05-29
Adler tube amplifier, ZETA
1961
Marconi 1.5kW Transmitter used by 2LO
1922
Low-power 'A' unit from 50KW m.f. transmitter
1929
Loop aerial type 2469B, serial no.939
1960-1963