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A257

Information - Help 
ID = 25781
       
Country:
France
Brand: Visseaux / Télévisso; Lyon / Paris
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to A257 = 57

Base 6-Pin-Base U6A, old, USA
Filament Vf 2.5 Volts / If 1 Ampere / Indirect / Parallel, (AC/DC)
Literature Babani, International Radio Tube Encyclopaedia   
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a257_lmp.jpg
A257: YBA
Bekir Yurdakul

 
a257_so.png
A257: ARRL Handbook 1972
Michael Schlör

 

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