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NT19

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ID = 17219
       
Country:
Great Britain (UK)
Brand: Common type Great Britain tube/semicond.
Developer: Mazda = Valve (Tube) brand GB (see also France) 
Tube type:  Transmitting Triode, air cooled 
  Ca. 1925 up to 1945 rare.
Identical to NT19 = CV1207 = ES450 = NT4A

Base Wires Wires only.
Was used by Military and/or Government
Filament Vf 17 Volts / If 5.65 Ampere / Direct / Specified voltage AC/DC
Description

7000V max anode voltage, 450W anode dissipation, 20 amplification factor. Pure tungsten filament.
Red anode wire at one end, two yellow filament wires and one green grid wire from the other side.

 
Dimensions (WHD)
incl. pins / tip
175 x 330 x mm / 6.89 x 12.99 x inch
Information source Taschenbuch zum Röhren-Codex 1948/49   
British Radio Valves - The Vintage Years: 1904-1925   Page 130
-- Original-techn. papers.

cv1207nt19_1.png
NT19: Manufacturer's Literature
Emilio Ciardiello

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