De Forest audion 1906-1915
1906-1915
One of Fleming's first thermionic diode valves, 1889
1889
Transistor, early British Experimental Device from Pye Radio Research Labs
Magnetron block
Early junction transistor (B.T.H.), c.1953
One of Fleming's first thermionic diode valves, 1889
1889
RCA 955 Acorn UFH triode vale (McVitie Weston valve collection), 1935
1935
Ostar-Ganz general-purpose triode valve (McVitie Weston valve collection) 1906-1972
1906-1972
CV1025 triode, 1906-1965
1906-1965
RCA Radiotron 35 VM RF pentode valve (McVitie Weston valve collection), 1931-1972
1931-1972
De Forest Audion soft detector triode (McVitie Weston valve collection), 1906-1972
1906-1972
Submarine repeater valve, 1950-1960
1950-1960
E.S.75 wireless valve, 1883-1930
1883-1930
Mullard EF9 VM RF pentode valve (McVitie Weston valve collection), 1939
1939
Siemens & Halske AG radio valve, 1884-1936
1884-1936
Mullard T.H.4 radio valve, 1936
1936
Submarine repeater pentode P.O. type 10P, 1950-1970
195-1970
Mullard video output pentode, T.S.P.4, 1920-1936
1920-1936
Mazda QP.240 battery double output pentode valve (McVitie Weston valve collection), 1935
1935
S.215 dummy valve, 1920-1929
1920-1929
Fotos triode valve with two top caps (McVitie Weston valve collection), 1916-1972
1916-1972
Loud speaker valve type L.S.5. W/T, 1923
1923
Mazradia E4M triode valve (McVitie Weston valve collection), 1910-1960
1910-1960
Cossor OM6 pentode valve (McVitie Weston valve collection), 1925-1946
1925-1946
First sealed-off travelling wave tube, 1945-1946
1945-1946
Sargrove sprayed circuit radio receiver production prototype, 1936-1948
1936-1948
Radio valve, 1936-1939
1936-1939
Mullard VP13C thermionic valve, 1934-1988
1934-1988
Marconi Osram DE 5b radio valve, 1920-1937
1920-1937
DA 60 RF triode valve, 1929-1972
1929-1972
Submarine-repeater pentode, P.O. type 6P10, 1950-1970
1950-1970
FE1 valve, 1920-1966
1920-1966
Amplifying valve type V24, 1920-1922
1920-1922
L.S.2 radio valve, 1920-1938
1920-1938
Ora wireless receiving triode, 1921
1921
Osram A.T.40 triode valve, 1921-1934
1921-1934
Passive component plate, type A3, for Sargrove sprayed-circuit radio receiver, 1936-1948
1936-1948
Mazda 1R5 heptode valve, 1933-1966
1933-1966
Submarine repeater pentode, 1950-1970
1950-1970
Osram W30 VM RF catkin pentode valve (McVitie Weston valve collection), 1935-1972
1935-1972
Emitron 6X4 rectifier, 1931-1966
1931-1966
Radio valve, micromesh type 7A.2, 1932-1933
1932-1933
K.L.1 ungettered valve, 1920-1927
1920-1927
Nelson multi A valve (McVitie Weston valve collection), 1920-1930
1920-1930
Submarine repeater pentode P.O. type 8P, 1950-1970
1950-1970
One of Fleming's first thermionic diode valves, 1889
1889
Point-contact transistor,type GET 2 c.1953
circa 1953
General Electric CA101 Pilotron triode (McVitie Weston valve collection), 1918
1918
AF triode valve (McVitie Weston valve collection), 1906-1972
1906-1972
Western Electric 717A pentode, 1926-1966
1926-1966