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ID = 5840
Brand: Common type Worldwide tube/semicond.
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Thyratron   Power-supply 
Identical to 5544 = XR1-3200 = CV2210 = PL5544 = RL5544 = 734 = ASG5544
First Source (s)
25.May.1948 : Electron Tube Registration List

Base Jumbo 4-pin bayonet (1918) Top contact with a cap.
Was used by Industrial
Filament Vf 2.5 Volts / If 12 Ampere / Direct

Va <1500 peak; Ia <3.2A mean.

Industrial controlled rectifier intended for motor control and arc welding applications.

Information source Essential Characteristics, GE 1973   
-- Original-techn. papers.   

5544_sockel.png 5544: Essential characteristics
Peter Hoddow

Just Qvigstad
5544: Mullard-original papers
Dietrich Grötzer

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