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45A

Country:  United States of America (USA)      Brand:  USA - Tubes designated in the USA 
  Tube type:  Triode, vacuum   Power/Output 
Tube ID = 20526
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Identical to 45A = 45 = 145 = 245 = 345 = 50A2 = FR304 = G45 = L45 = PX2450 = T45 = UX245 = 45_Arcturus = P245

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Filament Vf 2.5 Volts / If: 1.5 Ampere / -: Direct / -: Parallel, (AC/DC) /
Description Anode: 275V und 36mA; Steuergitter: -56V; Steilheit: 2mA/V; 3,5-fache Verstärkung; Innenwiderstand: 1,7kOhm. Unterschied zur 45? Oder warum eine andere Bezeichnung? 
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Literature

45a_silvertone_a.jpg
45A: JV
Jay Vonderhey

 
45a_2.png
45A: Datenblatt
Wolfgang Bauer

 
Usage in Models   1= 1935 ; 3= 1936
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):   4

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