Reporter mobile radiophone, 1951-1953
1951-1953
BT Ambassador 8100R telephone, 1981
1981
High-frequency chokes, 1900-1950
1900-1950
Mirror galvanometer for the transatlantic telegraph, 1858
1858
Filings coherer, glass tube with side pocket mounted on cylindrical rod with brass screw terminals at ends, 1894-1904
1894-1904
Coherer with coarse brass turnings, 1894
1894
Antenna from Ptarmigan communications system, 1985-2010
1985-2010
Filings coherer, glass tube containing powdered copper, bulb at one end, 1894-1904
1894-1904
High frequency sliding inductance on wood base, 1900-1950
1900-1950
Filings coherer, Lodge pattern with two wires inserted into bulb at one end, 1894-1904
1894-1904
Lord Kelvin's 'ironclad' marine galvanometer, 1865-1866
1865-1866
Trough battery, 1801-1838
1801-1838
Henley's magneto electric double needle telegraph, 1848-1852
1848-1852
Steljes ABC type printing telegraph receiver No. 477
1895-1910
Wheatstone's portable ABC telegraph, 1858
1858
Filings coherer, Lodge pattern, 1895-1900
1895-1900
Low frequency iron core inductance, 1900-1950
1900-1950
Filings coherer, glass tube bent into U-shape at one end with bulb to form side-pocket on mounting bracket with terminals, 1894-1904
1894-1904
Filings coherer, glass tube almost of taper shape, 1894-1904
1894-1904
Stroh's type-printer for Wheatstone ABC communicator, 1870-1881
1870-1881
Filings coherer, Lodge-Muirhead system, 1900-1910
1900-1910
Filings coherer, glass tube formed into T-shape at one end and bent round into U-shape at other end with bulb, 1899
1899
Copper busbars and ebonite insulators, 1900-1950
1900-1950
Coherer, narrow-bore glass tube, 1894-1904
1894-1904
Specimen of Dover-Calais telegraph cable, 1851
1851
Filings coherer, small glass tube with bulb at one end, 1894-1904
1894-1904
Spiral spring coherer, 1890-1894
1890-1894
Rotary convertor, 1900-1950
1900-1950
Murray multiplex tape transmitter, 1910-1920
1910-1920
Cooke and Wheatstone double needle telegraph, 1844
1844
Filings coherer, glass tube with side-pocket attached to mounting bracket, 1894-1904
1894-1904
Aerial tuning inductance, 1900-1950
1900-1950
'MPB' call sign plaque, 1900-1950
1900-1950
Filings coherer, Lodge-Muirhead system, 1900-1910
1900-1910
Machine used for covering wires with silk and cotton, 1837
1837
Cooke and Wheatstone's double needle telegraph, 1844
1844
Stud field regulator, 1900-1950
1900-1950
Filings coherer, glass tube curved into near U-shape at one end with coil winding at other end, 1894-1904
1894-1904
Wooden pillar insulators, 1900-1950
1900-1950
Coherer, with several needles in contact with crystal, 1894-1904
1894-1904
Filing coherer, glass tube, fitted on to mounting bracket with terminals, 1894-1904
1894-1904
Filings coherer, Lodge-Muirhead system, 1900-1910
1900-1910
Iolanda transformer in wooden box, 1900-1950
1900-1950
Guard lamps on wooden board, 1900-950
1900-1950
Moving magnet galvanometer with dial inscribed "Greenwich Mean Time", 1843-1897
1843-1897
One of the First Rechargeable Batteries, about 1860
1860
Tuning indicator with lamp, 1900-1950
1900-1950
Filings coherer, small glass tube with bulb at one end and cap of red sealing wax at other end, 1898
1898
Filings coherer, glass tube bent into U-shape at one end, 1894-1904
1894-1904
Deck-watch used by Capt. George Vancouver on board HMS Discovery 1791-5
1791