radiomuseum.org
Please click your language flag. Bitte Sprachflagge klicken.

L491D

Information - Help 
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
First Source (s)
21.Sep.1930 : Funkschau S. 307
Predecessor Tubes L490D  
Successor Tubes 1933   L496D  
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

Hannu Alho (FIN)
 
l491d_valvo.jpg

 
You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]
  
Data Compliance More Information