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ORA-A

Information - Help 
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.

Base Europe 4-Pin (A, 4A, B4, since 1914)
Filament Vf 3.8 Volts / If 0.65 Ampere / Direct / Battery =
 
ora_a_spec.png
ORA-A: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector


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