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ID = 1988
Brand: Common type Europe tube/semicond.
Developer: Telefunken Deutschland (TFK), (Gesellschaft für drahtlose Telegraphie Telefunken mbH 
Tube type:  Mag. Eye, 2 shadow angles, Pentode   Indication 
Identical to UFM11
Similar Tubes
Other characteristic (electr. data):
Heater different:
First year Dec.1940 Tube leaflet collection E.Erb Analysis by original leaflets
Successor Tubes UM11  

Base German Steel Y8A, 1938 (Codex=R)
Filament Vf 15 Volts / If 0.1 Ampere / Indirect
Information source Taschenbuch zum Röhren-Codex 1948/49   

UFM11: Internet
Miguel Angel Trujillo-Rodriguez

55_1.png UFM11: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad
UFM11: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

More ...
Usage in Models 2= 1940 ; 1= 1951

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):3

Collection of

Collection of a member from FIN


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