Cosmos DE.11 general-purpose triode valve (McVitie Weston valve collection), 1924
1924
Zither switch with open-wire multiple and two-motion ratchet drive, 1894
1894
Amplifying valve type V24, 1920-1922
1920-1922
Ora wireless receiving triode, 1921
1921
Strowger two-motion selector with vertical mount, 1903-1920
1903-1920
Strowger step-by-step automatic telephone exchange switch, 1897-1898
1897-1898
Experimental television receiver used by JL Baird in demonstration, made 1925-1926
1925-1926
Popular Wireless no. 1 vol. 1, 1922
1922
Central Battery transmitter (sectioned), 1903-1926
1903-1926
Telephone receivers with wooden handles, 1877-1902
1877-1902
Facsimile 1865 homemade telephone, 1888
1888
K.L.1 ungettered valve, 1920-1927
1920-1927
Wall telephone with Blake transmitter, 1880-1900
1880-1900
Main part of Marconi 1.5KW transmitter from 2LO
1922-1925
Cossor Wurncell W.1 output triode valve (McVitie Weston valve collection), 1923
1923
C.W. transmitter/receiver, Mk.1, 1917
1917
Crossley telephone receiver, 1880
1880
Filings coherer, Lodge-Muirhead system, 1900-1910
1900-1910
Receiver for Baudot Multiplex type-printing telegraph, 1911-1925
1911-1925
Bell from Cable Ship 'Faraday', 1923
1923
Coherer, coarse iron turnings, 1894-1904
1894-1904
Baudot five key keyboard, 1897-1926
1897-1926
Filings coherer, glass tube formed into bulbs at each end at right angles, 1899
1899
Double coherer (experimental), 1895-1906
1895-1906
Bas-relief head and shoulders of Guglielmo Marconi, 1903
1903
Filings coherer, glass tube, 1898
1898
No. I.T. Morse tape printer, 1925
1925
Receiving ‘jigger’ used by the Marconi Company, 1898
1898
Embossing telegraph receiver 1878-1900
1878-1900
Flat steel-spring (or watch-spring) coherer, 1894
1894
Filings coherer, small glass tube with bulb at one end, 1894-1904
1894-1904
Filings coherer, glass tube capped at ends, 1894-1904
1894-1904
Thirty-inch terrestial globe showing cable routes, 1900-1920
1900-1920
Filings coherer, glass tube bent at 45-degree angle at one end to form side-pocket, 1898
1898
Coherer, with steel needle inside part-wound with copper wire, 1894-1904
1894-1904
Filings coherer, Lodge-Muirhead system, 1900-1910
1900-1910
Iron borings coherer (Branly type), 1894
1894
Horseshoe magnet and keep used with experimental form of magnetic detector, 1900-1910
1900-1910
Portrait bust of Lord Kelvin, 1896
1896
Branly tripod coherer, 1900-1910
1900-1910
Coherer, with several needles, 1894-1904
1894-1904
Original wheel or steel-disc coherer, 1902
1902
Watch and wrist strap
1908
Watch by Waltham with a Dennison case
1904
Self-winding wristwatch by John Harwood
1928
Watch by Sir John Bennett
1884
Chronometer escapement in domed glazed case by William T. Heyes
1903
Watch with complications and minute repeating by Samuel Smith & Son
1899
Pendant in form of plastic model of "Heinz" gherkin
1885-1895
Ear trumpet and walking stick combined
1875-1885