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
Receiving ‘jigger’ used by the Marconi Company, 1899
1899
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
Experimental form of Marconi Company magnetic detector, 1900-1910
1900-1910
Experimental transmitting ‘jigger’ used by the Marconi Company, 1899
1899
Aerial inductances, 1901
1901
BBC L1 lip microphone, 1937-1960
1937-1960
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
Secrecy notice for telegrams, 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
Savoy Hill 'Meat Safe' microphone stand
1923
Marconi-Sykes magnetophone
1923
Horseshoe magnet and keep used with experimental form of magnetic detector, 1900-1910
1900-1910
Receiving ‘jigger’ used by the Marconi Company, 1898
1898
V2A Marconiphone receiver (long-range model) , 1922-1924
1922-1924
Billi condenser used for aerial tuning in Newfoundland, 1901
1901
Adler tube amplifier, ZETA
1961
Crompton 6" voltmeter no.179- c.1882, 0 - 300v.
circa 1882
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
Glass tube of smallest balls made for ball-bearings
1945
Marconi 1.5kW Transmitter used by 2LO
1922
Centre-zero moving-coil galvanometer marked Harris
1943-1980
Centre-zero moving-coil galvanometer sold by Philip Harris Ltd.
1943-1980
BBC ribbon microphone
circa 1945
Receiving ‘jigger’ used by the Marconi Company, 1898
1898
Receiving ‘jigger’ used by the Marconi Company, 1898
1898
Experimental magnetic detector, 1900-1902
1900-1902
Steel Iolanda switchboard, with light bulb and shade
1900-1950