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

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6BU4 vacuum tube outline illustration

Tube-number record

6BU4

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6BU4 is a tube type in the TubeDatabase archive (class: Triode HV Regulator). Recorded specifications: brand CBS-HYTRON, construction Beam tetrode / beam power, socket Octal, maximum plate voltage 25000 V, and maximum plate dissipation 25 W. The archive does not yet hold a photographed example of this type.

BrandCBS-HYTRON
ClassTriode HV Regulator
Base
Octal
Filament6.3 V @ 400 mA

Construction

Primary TypeBeam tetrode / beam power
EnvelopeT-12
Sectionssingle

Filament / Heater

Heater NotesPeak heater-cathode voltage: 225V max (heater negative to cathode)

Absolute Maximum Ratings

Plate Voltage25000 V
Plate Dissipation25 W
Grid 1 Voltage-125 V
Cathode Current10 mA
H-C Voltage225 V

Audio Performance

Key Features
  • High-voltage
  • Low-current
  • Sharp-cutoff beam triode
  • Efficient electron-gun structure
  • High amplification factor

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Shunt Regulator Service25000 V200—15151 mA

Application Notes

Designed for voltage regulation of the anode and focus supplies of color television receivers over the range of 5,000 to 25,000 volts.

Datasheets

Datasheet: 6BU4.pdf

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Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.

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