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ID = 50668
Tube type:  Vacuum Pentode   Power/Output 
Identical to UY247B = 47 = G-47 = 247S = UY-247_Japan

Base UY-Base, 5 Pins (USA, April 1927)
Filament Vf 2.5 Volts / If 1.75 Ampere / Direct / Specified voltage AC/DC
Description Japan. Used by Matsushita / National. 
Text in other languages (may differ)
Information source -- Collector info (Sammler)   Codex
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uy247b_so.png UY247B
Anonymous 10 Collector

Just Qvigstad
Usage in Models 5= 1933?

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):5

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