Skip to main content
Collection
Collection
Learning
The group
Visit us
Expand child menu
Locomotion
National Railway Museum
National Science and Media Museum
Science and Industry Museum
Science and Innovation Park
Science Museum
Collection
Search
About
Search
About
Collection
Learning
The group
Visit us
Expand child menu
Locomotion
National Railway Museum
National Science and Media Museum
Science and Industry Museum
Science and Innovation Park
Science Museum
Search our collection
All
7
People
0
Objects
7
Documents
0
View:
Filter search
Clear all filters
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
Mullard audio pentode, type EF37A
Pentode, type 9003
Marconiphone pentode valve
1933
R.C.A. pentode, type 6J7
Telefunken pentode, type RV12P2000
Valvo pentode valve
1942
