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ID = 21559
Tube type:  Beam Power Tube   Power/Output 
Identical to LL500 = 18GB5
Similar Tubes
Heater different:
  13GB5 ; 14GB5 ; 27GB5 ; 6GB5 ; EL500 ; PL500 ; XL500
First year 1960 Tube leaflet collection E.Erb Analysis by original leaflets

Base Magnoval (9-Pins), B9D
Was used by Radio/TV-reception etc.
Filament Vf 18 Volts / If 0.45 Ampere / Indirect / Specified current AC/DC ~ = (Series working)

mn1_g.gif LL500: RTT Schwandt
Günther Stabe † 19.8.20

Just Qvigstad
LL500: RCA Tube Manual
Peter Hoddow



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