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1851

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ID = 9709
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to 1851 = RK1851
Similar Tubes
Other shape (e.g. bulb type):
  1851GT ; R219
Different connections:
  6AC7
Other base and data slightly different:
  6C9_Fivre
First Source (s)
Apr.1938 : -- Original-techn. papers.
Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Uka) Top contact with a cap.
Filament Vf 6.3 Volts / If 0.45 Ampere / Indirect / Specified voltage AC/DC
Description

Television RF/IF pentode. 300V max plate, 150V max screen, 9000 micromhos Gm. Small control grid top cap.

 
Information source Taschenbuch zum Röhren-Codex 1948/49   
-- Original-techn. papers.   Electronics, April 1938
valvula1851.png
1851: Internet
Miguel Angel Trujillo-Rodriguez
374_12.png 1851: Telefunken Werkstattbuch
Wolfgang Bauer
More ...
Just Qvigstad 		1851_01.png
1851: Manufacturer paper
Tomasz Szczesniak
More ...
Usage in Models 1= 1938? ; 2= 1938 ; 3= 1939 ; 2= 1946 ; 1= 1950 ; 1= 1951??
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):10

Collection of

Emilio Ciardiello (I)
Alexander Hofer (A)
Georges Werts (B)
Valery Gromov (RUS)
Collection of a member from FIN
Patrice Zeissloff (F)
Aldo Patriarca (CH)
 
1851~~1.jpg

1851
 
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