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DF33

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ID = 2752
       
Country:
Europe
Brand: Common type Europe tube/semicond.
Developer: Mullard Wireless, London (see also Mullard Radio Valve) 
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to DF33
First year 1939 -- Collector info (Sammler)

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Uuo)
Was used by Radio/TV-reception etc.
Filament Vf 1.4 Volts / If 0.05 Ampere / Direct / Battery =
Tube prices 1 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
  df33.png
  DF33: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
df33_a.jpg
DF33: scc
Christian Schaufelberger

 
df33_so.png
DF33: rtt
Michael Schlör

 
df33_data.png
DF33: Mullard Valve+Service Manual 1951
Trev Levick


Usage in Models 1= 1939?? ; 2= 1945 ; 2= 1946? ; 8= 1946 ; 1= 1947? ; 2= 1947 ; 1= 1948?? ; 4= 1948 ; 1= 1949 ; 1= 1950 ; 1= 1955??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):24


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