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
Willis world clock, 1929-1935
1929-1935
'MPB' call sign plaque, 1900-1950
1900-1950
Lord Kelvin's 'ironclad' marine galvanometer, 1865-1866
1865-1866
Ring transformer, 1892
1892
Hand perforator and copy stand for Wheatstone automatic telegraph system, 1890-1910
1890-1910
Cooke and Wheatstone's double needle telegraph, 1844
1844
Billi condenser used for aerial tuning in Newfoundland, 1901
1901
Thirty pair PVC insulated and sheathed armoured cable, 1933-1969
1933-1969
Specimen of telegraph cable laid in Birmingham in 1856
1856
Polythene insulated copper conductor cable, 1939-1969
1939-1969
Magnetic key, 1850-1870
1850-1870
1500-pair exchange area cable, 1969
1969
A.B.C. telegraph transmitter, 1835-1845
1835-1845
Murray multiplex tape transmitter, 1910-1920
1910-1920
Cable for aerial installation, 1930-1962
1930-1962
Sample of four-core telegraph cable connecting Vancouver Island with the mainland
1904
Thirty pair self supporting polythene telephone distribution cable, 1933-1969
1933-1969
Hundred and fifty cable, 1933-1969
1933-1969
Experimental form of Marconi Company magnetic detector, 1900-1910
1900-1910
OALC4 DA fibre optic submarine cable, 1999
1999
Wheatstone's portable ABC telegraph, 1858
1858
Trough battery, 1801-1838
1801-1838
Ashtray and matchbox holder advertising the Eastern Telegraph Company, 1901-1929
1901-1929
Morse key, 1850-1870.
1850-1870
Replica of the first Morse telegraph, 1835
1934
Bain's chemical telegraph, 1850.
1850
Single needle telegraph, 1846
1846
Machine used for covering wires with silk and cotton, 1837
1837
Henley needle galvanometer, 1855-1860
1855-1860
Specimen of Dover-Calais telegraph cable, 1851
1851
Hertzian receiving resonator, 1890-1894
1890-1894
Cable grappling illustration, 1874-1924
1874-1924
Coherer, ebonite, with adjustable contacts, 1890-1896
1890-1896
Letter written by William Thomson (Lord Kelvin), 1858
1858-03-02
Experimental transmitting ‘jigger’ used by the Marconi Company, 1899
1899
Morse key with send-receive switch, 1900-1920
1900-1920
Specimens of Pacific cable in glazed presentation case, 1902-1923
1902-1923
Aerial inductances, 1901
1901