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SPT4A

Information - Help 
ID = 18356
       
Country:
Great Britain (UK)
Brand: Ferranti, GB
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to SPT4A

Base Europe 7-Pin C7A (Hx C, C7, C) 1933 (Codex=Fco) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1 Ampere / Indirect / Parallel, (AC/DC defined voltage)
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   Ferranti data book 1956
 

from Just Qvigstad

Usage in Models 3= 1936

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):3

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