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UF21

Information - Help 
ID = 2796
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to UF21
Similar Tubes
Other base:
  UF9
First year 1941 Tube leaflet collection E.Erb Analysis by original leaflets (P11)
First Source (s)
May.1941 : Radio-Mentor # 5
Feb.1941 : Daten und Schaltungen moderner ... Röhren; Philips # 3
Successor Tubes UF41  

Base Loctal-8, B8G (Sylvania, 1938) (Codex=Waa)
Was used by Radio/TV-reception etc.
Filament Vf 12.6 Volts / If 0.1 Ampere / Indirect / Series, AC/DC
Tube prices 2 Tube prices (visible for members only)
Literature Philips Bulletin   Juli 1941
Taschenbuch zum Röhren-Codex 1948/49   
  uf21.png
  UF21: Internet
Miguel Angel Trujillo-Rodriguez
 
uf21_19r.jpg
UF21: Collection JR
Jacob Roschy

 
uf21_so.png
UF21: rtt
Michael Schlör

 
uf21.png
UF21: Lorenz Empfänger - Röhren
Anonymous 54 Collector


Usage in Models 3= 1941 ; 1= 1942?? ; 1= 1942 ; 1= 1943 ; 2= 1944 ; 1= 1945?? ; 3= 1945? ; 2= 1945 ; 1= 1946?? ; 1= 1946? ; 7= 1946 ; 2= 1947? ; 2= 1947 ; 3= 1948?? ; 4= 1948? ; 12= 1948 ; 1= 1949?? ; 2= 1949? ; 5= 1949 ; 1= 1950?? ; 3= 1950? ; 6= 1950 ; 1= 1951? ; 2= 1951 ; 1= 1952 ; 1= 1955?? ; 1= 1955 ; 2= 1956 ; 1= 1957? ; 1= 1957 ; 1= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):75


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