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1851

Information - Help 
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
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 / Parallel, (AC/DC)
Description

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

 
Literature Taschenbuch zum Röhren-Codex 1948/49   
-- Original-techn. papers.   Electronics, April 1938
  valvula1851.png
  1851: Internet
Miguel Angel Trujillo-Rodriguez
 
1851~~1.jpg
1851: My tubes
Anonymous 413 Collector

 
374_12.png
1851: Telefunken Werkstattbuch
Wolfgang Bauer

 

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


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