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X81

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ID = 2613
       
Country:
Great Britain (UK)
Brand: MO Valve Co. Ltd.; GB
Developer: MO Valve Co. Ltd.; GB 
Tube type:  Triode-Heptode   Frequency converter 
Identical to X81
Similar Tubes
Normally replaceable-slightly different:
  E1969 ; X81M
First Source (s)
1947 : -- Collector info (Sammler)
Base Loctal-8, B8G (Sylvania, 1938)
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC
Information source Babani, International Radio Tube Encyclopaedia   P. 166 & 167
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Section 327, p. 760 & 761
Röhrencodex , Röhren-Taschenbuch 1950 23000 Röhren
415_4~~1.png X81: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad 		x81_characteristics.png
X81: My schematic collection.
Pier Antonio Aluffi
Usage in Models 1= 1947?? ; 1= 1947? ; 3= 1947 ; 2= 1948?? ; 5= 1948? ; 5= 1948 ; 1= 1949? ; 1= 1949 ; 3= 1950
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):22
Museum "Musée de la radio - Fondation Marconi"

Collection of

Aldo Patriarca (CH)
Jose Luis Villabona Horreo (E)
Georges Werts (B)
Collection of a member from FIN
Collection of a member from D
 
x81~~1.jpg

X81
 
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