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Tube Database (7,341 tube types · 1,270 archive entries)

Pre (2,630 tube types), Other (2,603 tube types), Power (1,292 tube types), Rectifier (816 tube types)
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TA 5/4000 vacuum tube outline illustration

Tube-number record

TA 5/4000

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TA 5/4000 is a tube type in the TubeDatabase archive (class: Transmitting Triode). Recorded specifications: brand Philips, construction Triode, maximum plate voltage 5000 V, and maximum plate dissipation 5000 W. The archive does not yet hold a photographed example of this type.

BrandPhilips
ClassTransmitting Triode

Construction

Primary TypeTriode
EnvelopeWater-cooled
Sections1

Filament / Heater

Materialtungsten

Absolute Maximum Ratings

Plate Voltage5000 V
Plate Dissipation5000 W
Cathode Current1250 mA

Audio Performance

Power Output4000 W
Key Features
  • water-cooled
  • high output at lower anode voltage
  • suitable for wavelengths down to 15 metres

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
H.F. class C telegraphy5000 V60002700161250 mA

Application Notes

For H.F. class C anode modulation (Heising system) the anode voltage should not exceed 4000 volts. Efficiency will be lower for wavelengths below 150 metres in Class B.

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