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SP16/R

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ID = 66966
       
Country:
Great Britain (UK)
Brand: Metropolitan-Vickers (Metro-Vick, Cosmos); GB
Developer: Metropolitan-Vickers (Metro-Vick, Cosmos); GB 
Tube type:  Triode, vacuum   Power/Output 
Identical to SP16/R

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 1.8 Volts / If 0.09 Ampere / Direct / Battery =
Description

Shortpath is a Cosmos brand, see Keith R. Thrower, British Radio Valves, page 48. Probably an anglicised version of the WD11 from the USA.

According to Tyne (pp.373, 374) there are three variants:
- SP18/B
- SP18/G
- SP18/R
in the Benjamin Catalog all SP18 are tubular, although Tyne shows an SP18/G having a globe shape. Error?

The SP18 without dot or suffix (B, G, R) is definitely existing (see photo)

Story of Cosmos valves see here

 
Text in other languages (may differ)
Information source 70 Years of Radiotubes and V.   p.196
History of the British Radio Valve to 1940   p.161

b4_base_pins~~168.png SP16/R: Fin Stewart
Fin Stewart


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