High frequency sliding inductance on wood base, 1900-1950
1900-1950
Wooden pillar insulators, 1900-1950
1900-1950
Copper busbars and ebonite insulators, 1900-1950
1900-1950
Stock Exchange automatic telegraph, 1872-1880
1872-1880
Rotary convertor, 1900-1950
1900-1950
De Forest syntoniser, 1902-1907
1902-1907
Magnetic key, 1850-1870
1850-1870
Ring transformer, 1892
1892
Replica of the first Morse telegraph, 1835
1934
Aerial tuning inductance, 1900-1950
1900-1950
Iolanda transformer in wooden box, 1900-1950
1900-1950
Siemens and Halske's ABC Telegraph used in Russia
1850-1897
Low frequency iron core inductance, 1900-1950
1900-1950
Tuning indicator with lamp, 1900-1950
1900-1950
High-frequency chokes, 1900-1950
1900-1950
Stud field regulator, 1900-1950
1900-1950
'MPB' call sign plaque, 1900-1950
1900-1950
Lucas grapnel, 1888-1960
1888-1960
Flag from Cable Ship 'Faraday' (sunk 1941), 1923-1941
1923-1941
Billi condenser used for aerial tuning in Newfoundland, 1901
1901
Henley needle galvanometer, 1855-1860
1855-1860
Thirty pair PVC insulated and sheathed armoured cable, 1933-1969
1933-1969
Coaxial cable sample, 1948-1967
1948-1967
Mirror galvanometer for the transatlantic telegraph, 1858
1858
Marconi coherer and Admiralty pattern decoherer, 1900-1910
1900-1910
Syntonic Leyden jars, 1880-1889
1880-1889
Specimen of telegraph cable laid in Birmingham in 1856
1856
Coherer, ebonite, with adjustable contacts, 1890-1896
1890-1896
Letter written by William Thomson (Lord Kelvin), 1858
1858-03-02
Polythene insulated copper conductor cable, 1939-1969
1939-1969
Experimental transmitting ‘jigger’ used by the Marconi Company, 1899
1899
Blotter with Western Telegraph Company markings, 1900-1960
1900-1960
Morse key with send-receive switch, 1900-1920
1900-1920
Guard lamps on wooden board, 1900-950
1900-1950
Lord Kelvin's 'ironclad' marine galvanometer, 1865-1866
1865-1866
1500-pair exchange area cable, 1969
1969
A.B.C. telegraph transmitter, 1835-1845
1835-1845
Receiving ‘jigger’ used by the Marconi Company, 1899
1899
Ashtray and matchbox holder advertising the Eastern Telegraph Company, 1901-1929
1901-1929
Morse key, 1850-1870.
1850-1870
Letter opener with calendar and map, 1893-1894
1893-4
Aerial inductances, 1901
1901
Cable for aerial installation, 1930-1962
1930-1962
Seventy five pair polythene insulated and sheathed distribution cable, 1933-1969
1933-1969
Morse tape on which signals were recorded by means of a coherer, 1900
1900
Sample of four-core telegraph cable connecting Vancouver Island with the mainland
1904
Hand perforator and copy stand for Wheatstone automatic telegraph system, 1890-1910
1890-1910
Thirty pair self supporting polythene telephone distribution cable, 1933-1969
1933-1969
'Leiber's Five Letter American Telegraph Code', book issued 1915
1915
Double-current telegraph key, 1830-1900
1830-1900