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ID = 5836
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Double Triode   Power/Output 
Identical to 1635
Similar Tubes
Other characteristic (electr. data):
First Source (s)
1942 : Tube Lore (I)

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Ud)
Filament Vf 6.3 Volts / If 0.6 Ampere / Indirect / Parallel, (AC/DC)
Description Duotriode, low-distortion high-µ Class B type, low-heater-current, T9 bulb on octal base; heater 6.3V @ 600 mA, µ 65, 3.3 W (RCA, W). Dev. for government use; "particularly used for underwater sound" (sonar?}. Announced by RCA 1942; sales limited to existing inventory 1971. [Information by L. Sibley]
Since this tube is operated without negative bias, it requires a high-µ characteristic to keep the plate current low. This is achieved by using two separate control grids connected in parallel inside the bulb. 
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Tube prices 1 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
  1635: RCA Manual
Jacob Roschy
1635: Peter Hoddow
Peter Hoddow

1635: Telefunken Werkstattbuch
Wolfgang Bauer


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