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7925

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ID = 32562
       
Country:
Italy
Brand: Marconi Italiana (Marconifono), Officine / Ufficio Marconi; Genova, Roma
Tube type:  Transmitter Triode, liquid-cooling   Power/Output 
Identical to 7925 = TW20

Filament Vf 12.5 Volts / If 280 Ampere / Direct
Description External anode, water cooled transmitting triode, capable of 20KW anode power dissipation. Intended for industrial applications, the tube could be used as class C amplifier or oscillator up to 10MHz at full power and up to 30MHz with reduced anode voltage. Pure tungsten direct heating cathode. 
Weight 4400 g / 155.21 oz
Information source - - Manufacturers Literature   

7925_tw20_1_1.png
7925: Manufacturer's Literature
Emilio Ciardiello

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Usage in Models 2= 1959?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2
 

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