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3171a

           
  Tube type:  Vacuum Pentode 
  Late but very rare. ***
Tube ID = 33272
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Identical to 3171a
Similar Tubes Other base and data slightly different:
 AF7

Base EU-Telephone 7-pin (G7K) Top contact with a cap
Filament Vf 4 Volts / If: 1 Ampere / -: Indirect / -: Parallel / series AC/DC /
Description Hersteller vermutlich Siemens Wien, Ua=250V, Ia=10mA, Ug2=150V, Ig2=4mA, Ug1=-2V, S=3,5mA/V, Ri=750kÙ, Pamax=3W, Pg2max=0,8W 
Text in other languages (may differ)
Literature

c3b.png
Lorenz Empfänger-Röhren ,9. Auflage
Michael Sigmund

 
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3171a    

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