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VT189_GPO

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ID = 64597
       
Country:
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Developer: Marconi-Osram - (Valves/Tubes); GB 
Tube type:  Thyratron   Text 
  Ca. 1925 up to 1945 very rare. ***
Identical to VT189_GPO = CV1128 = GT1C

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928
Was used by Telephony
Filament Vf 4 Volts / If 1.3 Ampere / Indirect / Specified voltage AC/DC
Description

Special small argon filled tube designed by MOV as the GT1C and used in the measurement of AC voltage using a technique known as "slide back".

 
Information source The Saga of Marconi Osram Valve   Pages 248 & 249
Babani, International Radio Tube Encyclopaedia   Page 305


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