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ORA-A

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ID = 28661
       
Country:
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Triode, vacuum   Universal 
Identical to ORA-A
First year 1922 ? 70 Years of Radiotubes and V.
First Source (s)
1922 : British Radio Valves - The Vintage Years: 1904-1925 p. 118

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 3.8 Volts / If 0.65 Ampere / Direct / Battery =

b4_base_pins~~61.png ORA-A: Fin Stewart
Fin Stewart


Just Qvigstad
ora_a_spec.png
ORA-A: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector

 

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