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31C81

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ID = 31579
       
Country:
Great Britain (UK)
Brand: Ediswan, Siemens Edison Swan Electric Co.; London
Tube type:  Oscilloscope CRT, picture tube   Indication 
Identical to 31C81

Base Diheptal (14 pin glass U14)
Filament Vf 6.3 Volts / If 0.5 Ampere / Indirect / Specified voltage AC/DC
Description 6" measurement tube with PDA. ES focus and deflection. 
Information source - - Manufacturers Literature   
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Just Qvigstad
31c81_ediswan_data_01.png
31C81: Original data sheet
Michael Poll

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