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 Vacuum Tubes/Valves


Fleming Valve
(British)
1910
The Fleming valve is considered to be the grandfather of all thermionic vacuum tubes. Click here for more information.
 


Deforest Tubular Audion
(U.S.)
1916

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Osram R2A
(British)
1919


DeForest Spherical Audion
c. 1914
 
Expanse "B"
(Australian)
c. 1919
Deforest Long Plate Spherical Audion
c. 1915
This is the tube that made long distance telephone possible.


Radion GP
(British)
1926


Cossor A.U.3
Early EHT Rectifier
Marconi Osram DE6
(British)
1925
 

Marconi Osram DER
(British)
1925


Thorpe K4
(British)
1924


Marconi Osram DE2LF
(British)
1925

 Heussen Frelat DKP
(Dutch)
 


Ediswan ARDE (LF)
(British)
1923


Osram MPT4
General Electric Co.
(British)

BVA R27
(British)
1926
E.B. Myers RAC3
(Canadian)
1922
Marconi Osram KL1 (British)
1927

Ediswan AR
(British)
1922


Marconi Osram LS3 D  (British)
1927


Cossar P1
(British)
1922


Unknown Spherical
(Probably British)
Radio Micro
(French)
1924
Radio Micro Nicro\metal 6/100
(French)
1924

Round-Marconi V24 Valves in original cartons
1916
 

 

RCA Point of Sale Display
1926
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