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A257

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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 / Specified voltage AC/DC
Information source Babani, International Radio Tube Encyclopaedia   
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a257_so.png A257: ARRL Handbook 1972
Anonymous 10 Collector


Just Qvigstad
Usage in Models 1= 1934

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1
 
a257_lmp.jpg

 

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