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Tube Database (1,270 tubes)

Other (3257), Pre (2314), Power (1030), Rectifier (740)
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BTW 25-3

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BrandBrown Boveri
ClassTransmitting Triode

Construction

Primary TypeTriode
EnvelopeGlass-Metal
Sections1

Filament / Heater

MaterialThoriated tungsten

Absolute Maximum Ratings

Plate Voltage15000 V
Plate Dissipation30000 W
Grid 1 Voltage-1500 V
Cathode Current11000 mA

Audio Performance

Key Features
  • Water-cooled anode
  • Thoriated tungsten cathode
  • Industrial and broadcast applications

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class C RF Unmodulated, Grounded Cathode15000V---10000mA
Class C RF Unmodulated, Grounded Cathode12500V---10000mA
Class C RF Unmodulated, Grounded Cathode10000V---10000mA
Class B AF Amplifier (2 tubes in push-pull)12500V---13600mA

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