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VEL11

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ID = 660
       
Country:
Germany
Brand: Telefunken Deutschland (TFK), (Gesellschaft für drahtlose Telegraphie Telefunken mbH
Developer: Telefunken Deutschland (TFK), (Gesellschaft für drahtlose Telegraphie Telefunken mbH 
Tube type:  Double Tetrode   beam power 
Identical to VEL11
Similar Tubes
Heater different:
  UEL11
First year 1947 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
1946 : Funk-Technik (FT) # 2
Jan.1947 : Funkschau # 2
Predecessor Tubes VCL11  
Successor Tubes 1948   UEL11   UEL71  

Base German Steel Y8A, 1938 (Codex=R) Top contact with a cap
Was used by Radio/TV-reception etc.
Filament Vf 90 Volts / If 0.05 Ampere / Indirect / Series, AC/DC
Tube prices 5 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
  vel11.gif
  VEL11: Radiomuseum Org
Egon Strampe
 
vel11_1.jpg
VEL11: Ingo Moll
Anonymous 557 Collector

 
vel11_sock.png
VEL11: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

 
vel11_spec.png
VEL11: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector


Usage in Models 2= 1946 ; 1= 1947?? ; 2= 1947? ; 20= 1947 ; 1= 1948? ; 19= 1948 ; 7= 1949 ; 1= 1950? ; 2= 1950 ; 2= 1951 ; 1= 1953

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):58



Forum contributions about this tube
VEL11
Threads: 1 | Posts: 1
Hits: 1792     Replies: 0
VEL11 Tetrode curve families
Joe Sousa
24.Aug.10
  1

Fellow radiophiles,

I took the following curve families from the VEL11 by Telefunken that came with my Grundig Gloria 51GW.

Tube emission seems pretty good because the power tetrode section is rated to draw 22mA with G1=-6V and G2=200V, and this specification point is met at the far right of the sixth curve from the top in the first plot.

The power tetrode section with 200V and 100V at G2

The detector tetrode section with 20V and 30V at G2

These curves suggest that the detector tetrode is constructed as a classic tetrode, while the power tetrode has no kink and has the sharp knee that is typical of beam tetrodes.

Best regards,

-Joe

 
VEL11
End of forum contributions about this tube

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