Marconi magnetic detector No. 12739 with cover, 1900-1950
1900-1950
Stud field regulator, 1900-1950
1900-1950
High-frequency chokes, 1900-1950
1900-1950
Low frequency iron core inductance, 1900-1950
1900-1950
Copper busbars and ebonite insulators, 1900-1950
1900-1950
Aerial tuning inductance, 1900-1950
1900-1950
Marconi-Reisz 'Marble' Microphone
1927-30
BBC L1 lip microphone, 1937-1960
1937-1960
High frequency sliding inductance on wood base, 1900-1950
1900-1950
Rotary convertor, 1900-1950
1900-1950
'MPB' call sign plaque, 1900-1950
1900-1950
Wooden pillar insulators, 1900-1950
1900-1950
Iolanda transformer in wooden box, 1900-1950
1900-1950
Guard lamps on wooden board, 1900-950
1900-1950
Tuning indicator with lamp, 1900-1950
1900-1950
Receiving ‘jigger’ used by the Marconi Company, 1899
1899
Experimental transmitting ‘jigger’ used by the Marconi Company, 1899
1899
Billi condenser used for aerial tuning in Newfoundland, 1901
1901
Aerial inductances, 1901
1901
Experimental form of Marconi Company magnetic detector, 1900-1910
1900-1910
BBC Marconi AXBT ribbon microphone
1944-1959
Fixed gap discharger, 1900-1950
1900-1950
Stud motor starter, 1900-1950
1900-1950
Marconi multiple tuner, serial number 6305, 1900-1950
1900-1950
Buzzer key, 1900-1950
1900-1950
Magnetic key relay, 1900-1950
1900-1950
Bridge telephone, 1900-1950
1900-1950
Marconi-Sykes Magnetophone microphone
1923
Marconi-Sykes magnetophone
1923
Savoy Hill 'Meat Safe' microphone stand
1923
V2A Marconiphone receiver (long-range model) , 1922-1924
1922-1924
Main part of Marconi 1.5KW transmitter from 2LO
1922-1925
Brass earth arrester plates, 1900-1950
1900-1950
Coil type testing buzzer, 1900-1950
1900-1950
Secrecy notice for telegrams, 1900-1950
1900-1950
Main transmitting condenser in wooden case, 1900-1950
1900-1950
Wave shortening condenser in wood case, 1900-1950
1900-1950
Receiving ‘jigger’ used by the Marconi Company, 1898
1898
Billi condenser used for aerial tuning in Newfoundland, 1901
1901
Horseshoe magnet and keep used with experimental form of magnetic detector, 1900-1910
1900-1910
Centre-zero moving-coil galvanometer marked Griffin and George Ltd.
1954-1980
Moving-coil voltmeter in angled wooden stand
1945-1954
Adler tube amplifier, ZETA
1961
Moving-coil milliammeter or universal indicator marked Griffin and George Ltd.
1954-1980
Hoffman extra light type ball journal S1.
1925
Hoffman medium type ball journal bearing
1925
Shunt, for Crompton Universal moving-coil galvanometer
1950-1983
Receiving ‘jigger’ used by the Marconi Company, 1898
1898
Crompton Parkinson A C test meter set
1926
Receiving ‘jigger’ used by the Marconi Company, 1898
1898