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ID = 9921
Great Britain (UK)
Brand: Common type Great Britain tube/semicond.
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to CV1176 = NR54/A
Similar Tubes
Normally replaceable-slightly different:
  AP4 ; CV1175 ; ZA1

Base Acorn 7 pin wide P7A (GB only)
Filament Vf 4 Volts / If 0.25 Ampere

Acorn bulb, British pin-spacing.

Information source Taschenbuch zum Röhren-Codex 1948/49   
CV1176: Manufacturer's Literature
Emilio Ciardiello

CV1176: Manufacturer's Literature
Emilio Ciardiello

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