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SP2

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ID = 10262
       
Country:
Great Britain (UK)
Brand:
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to SP2 = SPT2
Similar Tubes
Normally replaceable-slightly different:
  ARP2 ; SP2V
First Source (s)
22.Nov.1935 : Wireless World (The), London (WW, 79)
Base British-7-Pin, old (M7A) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.1 Ampere / Direct / Battery =
Description

Lissen and Mullard are known brands

 
Text in other languages (may differ)
Information source History of the British Radio Valve to 1940   p. 142 & 196
Babani, International Radio Tube Encyclopaedia   p. 142 & 143
Taschenbuch zum Röhren-Codex 1948/49
s_462_g_3.gif SP2: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe † 19.8.20

Just Qvigstad 		sp2.png
SP2: Mullard Maintenance Manual 1954
Achim Dassow
Usage in Models 1= 1930 ; 1= 1931 ; 1= 1933 ; 1= 1934?? ; 2= 1934? ; 3= 1934 ; 2= 1935?? ; 7= 1935? ; 8= 1935 ; 3= 1936 ; 1= 1937? ; 6= 1937 ; 1= 1938? ; 3= 1938
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):40

Collection of

Pedro Prieto-Castro (E)
Valery Gromov (RUS)
Rudolf Osterkamp (D)
 
mullard_sp2_bild1.jpg

SP2
 
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