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OP41

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ID = 25622
       
Country:
Great Britain (UK)
Brand: Ekco, E.K.Cole Ltd.; Southend-on-Sea
Tube type:  Vacuum Pentode   Power/Output 
Identical to OP41 = Pen428 = PenB4

Base British-7-Pin, old (M7A)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 2.1 Ampere / Indirect
Description

8W audio output

Probably made by Mullard a rebranded PenB4

 
Text in other languages (may differ)
Information source -- Collector info (Sammler)   
 
op41_so.png
OP41: ARL 1947
Michael Schlör

 

from Just Qvigstad

Usage in Models 2= 1937 ; 1= 1938

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

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