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ID = 18438
United States of America (USA)
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Thyratron 
Identical to 885 = RX885
Similar Tubes
Normally replaceable-slightly different:
  2B4 ; WL629
Other class quality (otherwise equal):
Heater different:
Other base:
First Source (s)
21.Mar.1945 : Electron Tube Registration List 401

Base UY-Base, 5 Pins (USA, April 1927) (Codex=H)
Was used by Radio/TV-reception etc.
Filament Vf 2.5 Volts / If 1.5 Ampere / Indirect / Specified voltage AC/DC

Argon filled high-stability thyratron intended for use as horizontal sweep oscillator in oscilloscope circuits. 300V peak plate voltage, 75mA average current.
Same characteristics as 884, with UY 5-pin base.
Chatham, GE, RCA and Westinghouse known manufacturers.

Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
x 102 x 38 mm / x 4.02 x 1.50 inch
Weight 37 g / 1.31 oz
Tube prices 2 Tube prices (visible for members only)
Information source Tube Lore (II)   p. 81
-- Original prospect or advert   
Tube Lore (I)
Taschenbuch zum Röhren-Codex 1948/49

885: Technique de l'oscilloscope Editions Radio 1965
Bernard Parent
    More ...
885~~1.png 885: Manufacturer's Literature
Emilio Ciardiello

More ...

Just Qvigstad
885: Sylvania Technical Manual
Peter Hoddow

More ...
Usage in Models 1= 1935? ; 2= 1935 ; 4= 1936 ; 1= 1937 ; 7= 1938 ; 1= 1941??

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):16

Collection of



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