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ID = 84977
Great Britain (UK)
Brand: MO Valve Co. Ltd.; GB
Developer: Telefunken Deutschland (TFK), (Gesellschaft für drahtlose Telegraphie Telefunken mbH 
Tube type:  Transmitting Triode, air cooled   Power/Output 
Identical to E542
Similar Tubes
Normally replaceable-slightly different:

Base SPECIAL TUBEBASE in general Sidecontact.
Was used by Prototype only, no series built
Filament Vf 8 Volts / If 1.6 Ampere / Indirect

Experimental RS291 (Telefunken). Developed at the Hirst Research Centre of GEC.

Information source -- Collector info (Sammler)   Undated list of experimental MOV tubes.


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