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SP18/RR

Information - Help 
ID = 28782
       
Country:
Great Britain (UK)
Brand: Metropolitan-Vickers (Metro-Vick, Cosmos); GB
Tube type:  Triode, vacuum   Power/Output 
Identical to SP18/RR
First year 1925 Saga of the Vacuumtube, Tyne page 373

Base Europe 4-Pin (A, 4A, B4, since 1914)
Was used by Radio/TV-reception etc.
Filament
Description

Story of Cosmos valves see here

 
Literature 70 Years of Radiotubes and V.   p.196
 
sp18rrcosmos_1_klein_klein.jpg
SP18/RR
Geri Meier

 
b4_triode~~8.png
SP18/RR: Fin Stewart
Fin Stewart

 


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