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SP55/B

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ID = 28783
       
Country:
Great Britain (UK)
Brand:
Developer: Metropolitan-Vickers (Metro-Vick, Cosmos); GB 
Tube type:  Triode, vacuum   Universal 
Identical to SP55/B = AMR.6/9
Similar Tubes
Other characteristic (electr. data):
  SP55/R
First year 1925 Saga of the Vacuum Tube, Tyne page 373, 374

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

Blue Spot "Shortpath"

Story of Cosmos valves see here

 
Information source History of the British Radio Valve to 1940   p.161

b4_base_pins~~171.png SP55/B: Fin Stewart
Fin Stewart


Just Qvigstad
Usage in Models 1= 1926

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1
 

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