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Image
Has Image
101
Non-Commercial Use
11
Category
Radio Communication
133
Electronic Components
11
Cinematography
1
Collection
Kodak Collection
1
Maker
Marconi Osram Valve Co
31
Marconi Osram Valve Company Limited
11
British Thomson-Houston Company Limited
10
Metropolitan-Vickers Electrical Company Limited
7
A C Cossor Limited
6
Edison Swan Electric Co. Ltd
6
General Electric Company Limited
5
Burndept Limited
3
Mullard Radio Valve Company Limited
3
Mullard Wireless Service Co. Ltd
3
Object type
triode valve
145
thermionic valve
79
triode valve; thermionic valve
46
thermionic valve; triode valve
32
tetrode
2
triode valve; tetrode
1
triode valve; thermionic valve; tetrode
1
Place
England
98
England, United Kingdom
98
United States
11
Germany
5
United Kingdom
4
Great Britain
3
Great Britain, United Kingdom
3
Austria
2
Belgium
1
Berlin
1
Material
metal (unknown)
131
glass
129
plastic (unidentified)
73
bakelite
15
cardboard
14
Date
From
To
filter
Marconi thermionic triode valve
1943
Thermionic triode valve
Marconi Osram thermionic triode valve
1923
Mazda triode valve
Thermionic triode valve
circa 1920s-1930s
Marconi Osram thermionic triode valve
1927
Marconi thermionic triode valve
1923
Wade Bequest: DE6 triode radio valve with blue tint
Mullard D0.6 triode
Wade Bequest: ORA triode radio valve
Wade Bequest: DER triode radio valve
Wade Bequest: DE6b triode radio valve with green tint
Wade Bequest: DER triode radio valve
Edison Swan thermionic triode valve
1932
KTD power amplifier
1918
Marconi thermionic triode valve
1925
Metropolitan-Vickers thermionic triode valve
1925
Marconi Osram thermionic triode valve
1925
Marconi Osram thermionic triode valve
1925
Marconiphone thermionic triode valve
1942
Marconi Osram thermionic triode valve
1925
Mullard thermionic triode valve
1928
Moorhead thermionic triode valve
1922
Metropolitan-Vickers Cosmos thermionic triode valve
1923
British Thomson-Houston thermionic triode valve
1924
Cossor thermionic triode valve
1932
Marconi Osram thermionic triode valve
1932
Marconi thermionic triode valve
1927
Marconi thermionic triode valve
1923
Ediswan thermionic triode valve
1923
Neutron thermionic triode valve
1930
Thermionic triode valve
1924
British Thomson-Houston thermionic triode valve
1928
Metropolitan-Vickers thermionic triode valve
1925
Wade Bequest: ONEVOLT ORA triode radio valve
Wade Bequest: DER triode radio valve
Mullard ORA triode
Marconi-Osram LS3 triode, BBC-marked
Marconi Osram thermionic triode valve
1925
Cossor thermionic triode valve
1932
Marconi thermionic triode valve
1923
Edison Swan thermionic triode valve
1930
Triotron thermionic triode valve
1935
Marconi triode valve
1930
British Thomson-Houston thermionic triode valve
1924
Cleartron thermionic triode valve
1927
Marconi thermionic triode valve
1940
Marconi Wireless Telegraph thermionic triode valve
1918
Marconi Osram thermionic triode valve
1927
Marconi Osram thermionic triode valve
1935
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