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L491D

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ID = 11322
       
Country:
Germany
Brand: Valvo GmbH, Radioröhrenfabrik; Hamburg
Tube type:  Vacuum Pentode   Power/Output 
Identical to L491D = E443N
Similar Tubes
Heater different:
  RES664d
First year 1930 Tube leaflet collection E.Erb Analysis by original leaflets

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Foo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1 Ampere / Direct / Specified voltage AC/DC
Information source Taschenbuch zum Röhren-Codex 1948/49   

4_20.png L491D: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
l491d_tech.png
L491D: Valvo Röhrendatenblatt
Martin Steyer

More ...
Usage in Models 1= 1934

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1

Collection of

 
l491d_valvo.jpg

 

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