De Forest audion 1906-1915
1906-1915
Audion (with spherical bulb), 1906
1906
Transistor, early British Experimental Device from Pye Radio Research Labs
First sealed-off travelling wave tube, 1945-1946
1945-1946
De Forest Audion soft detector triode (McVitie Weston valve collection), 1906-1972
1906-1972
Ostar-Ganz general-purpose triode valve (McVitie Weston valve collection) 1906-1972
1906-1972
General Electric CA101 Pilotron triode (McVitie Weston valve collection), 1918
1918
Fotos triode valve with two top caps (McVitie Weston valve collection), 1916-1972
1916-1972
CV1092 diode, 1904-1965
1904-1965
AF triode valve (McVitie Weston valve collection), 1906-1972
1906-1972
Sylvania 1LA6 frequency changer valve, 1931-1966
1931-1966
CV525 pentode, 1924-1965
1924-1965
RCA 955 Acorn UHF triode thermionic valve (McVitie Weston valve collection), 1935
1935
Raytheon 6D6 VM RD pentode valve (McVitie Weston valve collection), 1934-1972
1934-1972
RCA Radiotron 35 VM RF pentode valve (McVitie Weston valve collection), 1931-1972
1931-1972
VT60A triode 807 valve (McVitie Weston valve collection), 1906-1972
1906-1972
Early junction transistor (B.T.H.), c.1953
Magnetron block
Submarine repeater valve, 1950-1960
1950-1960
Mullard video output pentode, T.S.P.4, 1920-1936
1920-1936
CV1025 triode, 1906-1965
1906-1965
Mullard T.H.4 radio valve, 1936
1936
Submarine repeater pentode P.O. type 10P, 1950-1970
195-1970
Cossor OM6 pentode valve (McVitie Weston valve collection), 1925-1946
1925-1946
E.S.75 wireless valve, 1883-1930
1883-1930
Mazda QP.240 battery double output pentode valve (McVitie Weston valve collection), 1935
1935
Mullard EF9 VM RF pentode valve (McVitie Weston valve collection), 1939
1939
Loud speaker valve type L.S.5. W/T, 1923
1923
Mullard EF50 Valve, 1939
1939
S.215 dummy valve, 1920-1929
1920-1929
One of Fleming's first thermionic diode valves, 1889
1889
Mazradia E4M triode valve (McVitie Weston valve collection), 1910-1960
1910-1960
Western Electric 717A pentode, 1926-1966
1926-1966
Osram A.T.40 triode valve, 1921-1934
1921-1934
Mazda 1R5 heptode valve, 1933-1966
1933-1966
One of Fleming's first thermionic diode valves, 1889
1889
Emitron 6X4 rectifier, 1931-1966
1931-1966
Submarine repeater pentode P.O. type 8P, 1950-1970
1950-1970
Submarine repeater pentode, 1950-1970
1950-1970
Radio valve, micromesh type 7A.2, 1932-1933
1932-1933
FE1 valve, 1920-1966
1920-1966
Marconi Osram DE 5b radio valve, 1920-1937
1920-1937
Submarine-repeater pentode, P.O. type 6P10, 1950-1970
1950-1970
Post Office PO/VA No. 2 triode valve (McVitie Weston valve collection), 1906-1972
1906-1972
McVitie Weston valve collection, Hivac XL HF triode valve, 1935
1935
Cossor Wurncell W.1 output triode valve (McVitie Weston valve collection), 1923
1923
Mullard PM6D output triode valve (McVitie Weston valve collection), 1929-1972
1929-1972
L.S.2 radio valve, 1920-1938
1920-1938
Nelson multi A valve (McVitie Weston valve collection), 1920-1930
1920-1930
Radio valve, 1936-1939
1936-1939