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Tube Database (1,270 tubes)

Other (7066), Pre (189), Power (67), Rectifier (19)
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BTL 1-1

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BrandBrown Boveri
ClassTransmitting Triode

Construction

Primary TypeTriode
EnvelopeGlass/Metal
SectionsSingle

Filament / Heater

MaterialThoriated tungsten

Absolute Maximum Ratings

Plate Voltage4000 V
Plate Dissipation1000 W
Grid 1 Voltage-500 V
Cathode Current700 mA

Audio Performance

Power Output1900 W
Key Features
  • Air-cooled
  • Directly heated
  • Thoriated tungsten filament
  • Forced air cooling

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class C RF Amplifier Unmodulated4000V12000233328600mA
Class C RF Amplifier Anode Modulated3000V12000233328500mA
Class B AF Power Amplifier (Push-Pull, per tube)4000V12000233328700mA

Application Notes

RF and AF amplifier in FM, TV, and SW transmitters. Suitable for industrial oscillators.

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