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3172a Info
           
  Tube type:  Vacuum Pentode (without beam power)   Controlling (mu) 
  late but very rare
Tube ID = 33276
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Identical to 3172a
Similar Tubes AF3 (other base and data slightly different)  

Base EU-Telephone 7-pin (G7K) Top contact with a cap
Filament -: Indirect / -: Parallel / series AC/DC / If: 1 Ampere / Vf 4 Volts /
Description Hersteller vermutlich Siemens Wien, Ua=250V, Ia=12...0,5mA, Ug2=120V, Ig2=5...0,2mA, Ug1=-2...-20V, S=2,3...0,1mA/V, Ri=600kΩ, 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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3172a    

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