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21B12

Information - Help 
ID = 31696
       
Country:
Great Britain (UK)
Brand: Ediswan, Siemens Edison Swan Electric Co.; London
Tube type:  Thyratron   Power-supply 
Identical to 21B12 = 3G/450A = CV2753
First Source (s)
Dec.1960 : - - Manufacturers Literature Tentative data

Base UX-Base (4 Pins (2 thick, USA 1924, UX) Top contact with a cap.
Was used by Industrial
Filament Vf 2.5 Volts / If 9 Ampere / Direct / Specified voltage AC/DC
Description

For Use in Welding and Motor Control

Va <1250 PIV; Ik <2.5A mean.

 
Dimensions (WHD)
incl. pins / tip
40 x 158 x mm / 1.57 x 6.22 x inch
Weight 76 g / 2.68 oz
Information source - - Manufacturers Literature   

5684_so~~2.png 21B12: Fin Stewart
Fin Stewart


Just Qvigstad
21b12_ediswan_data_01.png
21B12: original data sheet
Bernd Staginnus

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