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247S

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ID = 40641
       
Country:
Canada
Brand: Rogers-Majestic, Standard Radio Manufacturing, Rogers Radio Tubes; Toronto
Tube type:  Vacuum Pentode   Power/Output 
Identical to 247S = 247 = 47 = UY-247_Japan = UY247B
First Source (s)
Jun.1931 : -- Collector info (Sammler)

Base UY-Base, 5 Pins (USA, April 1927)
Filament Vf 2.5 Volts / If 1.75 Ampere / Direct / Parallel, (AC/DC)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
 
247s_so.png
247S: ARRL Handbook 1972
Michael Schlör

 

Usage in Models 2= 1932? ; 4= 1932

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):6

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