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ID = 25490
Tube type:  Vacuum Pentode   Power/Output 
Identical to 12ZP1 = 12Z-P1
Similar Tubes
Heater different:
  12Z-P1A ; 12ZP1A

Base 6-Pin-Base U6A, old, USA
Filament Vf 12 Volts / If 150 Ampere / Indirect / Specified voltage AC/DC
Description Japan. Ua= 180 V; Ug2= 180 V; Ug1=-10V; Ia= 15mA; Ig2= 2.5mA; S= 1,75 mA/V; Na= 1 W; Ra= 12kOhm;
or Ua= 100 V; Ug2= 100 V; Ug1=-5.5V; Ia= 7 mA; S= 1,4 mA/V; (Babani) 
Information source Babani, International Radio Tube Encyclopaedia   
-- Collector info (Sammler)   
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