Thorpe 4-electrode valve (McVitie Weston valve collection) 1924
1924
V2A Marconiphone receiver (long-range model) , 1922-1924
1922-1924
Cosmos DE.11 general-purpose triode valve (McVitie Weston valve collection), 1924
1924
Selector super portable broadcast receiver, 1925-1930
1925-1930
Zither switch with open-wire multiple and two-motion ratchet drive, 1894
1894
Amplifying valve type V24, 1920-1922
1920-1922
McVitie Weston valve collection, Hivac XL HF triode valve, 1935
1935
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
Novelty crystal radio set, 1925-1930
1925-1930
200 series dial telephone, 1925-1935
1925-1935
Crystal set with Braille dial markings, 1929-1935
1929-1935
Osram A.T.40 triode valve, 1921-1934
1921-1934
Hull Corporation telephone, 1900-1910
1900-1910
Experimental television receiver used by JL Baird in demonstration, made 1925-1926
1925-1926
Central Battery transmitter (sectioned), 1903-1926
1903-1926
Radio valve, micromesh type 7A.2, 1932-1933
1932-1933
Burndept Ultra IV wireless receiver, glass back No. 4798, 1923
1923
Gecophone Crystal Detector Radio Set No. 1, 1923
1923
K.L.1 ungettered valve, 1920-1927
1920-1927
Main part of Marconi 1.5KW transmitter from 2LO
1922-1925
Nelson multi A valve (McVitie Weston valve collection), 1920-1930
1920-1930
Cossor Wurncell W.1 output triode valve (McVitie Weston valve collection), 1923
1923
C.W. transmitter/receiver, Mk.1, 1917
1917
Filings coherer, Lodge-Muirhead system, 1900-1910
1900-1910
Receiver for Baudot Multiplex type-printing telegraph, 1911-1925
1911-1925
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
Filings coherer, glass tube, 1898
1898
Replica of Morse's second model of telegraphy apparatus, 1934
1934
Billi condenser used for aerial tuning in Newfoundland, 1901
1901
No. I.T. Morse tape printer, 1925
1925
Receiving ‘jigger’ used by the Marconi Company, 1898
1898
Flat steel-spring (or watch-spring) coherer, 1894
1894
Filings coherer, small glass tube with bulb at one end, 1894-1904
1894-1904
Iron borings coherer (Branly type), 1894
1894
Filings coherer, glass tube capped at ends, 1894-1904
1894-1904
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
Branly tripod coherer, 1900-1910
1900-1910
Coherer, with several needles, 1894-1904
1894-1904
Original wheel or steel-disc coherer, 1902
1902
Primax moving iron loudspeaker, 1924-1927
1924-1927
Audio trunk cable specimen, 1925-1935
1925-1935
Section of cross-Channel telephone cable, 1897
1897