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Image
Has Image
7
Non-Commercial Use
5
Category
Electronic Components
5
Radio Communication
2
Maker
Marconiphone Company Limited
1
Valvo
1
Valvo Radioröhrenfabrik GmbH
1
Object type
pentode
7
thermionic valve
2
valve
2
valve; pentode; thermionic valve
2
Place
England
1
England, United Kingdom
1
Germany
1
Material
glass
2
metal (unknown)
2
plastic (unidentified)
2
cardboard
1
Date
From
To
filter
KEN/RAD pentode, type 6AG7
Pentode, type 9003
Mullard audio pentode, type EF37A
Marconiphone pentode valve
1933
Telefunken pentode, type RV12P2000
R.C.A. pentode, type 6J7
Valvo pentode valve
1942
