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

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Tube-number record

6BL4

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BrandLansdale Tube Company
ClassHigh Voltage Diode Damper Tube
BaseOctal
Filament6.3 V @ 1.2 mA

Construction

Primary TypeDiode
Rectifier TypeHigh-vacuum
EnvelopeT9
SectionsSingle

Filament / Heater

Heater NotesCoated unipotential cathode

Absolute Maximum Ratings

Plate Voltage5000 V
Plate Dissipation8 W
Cathode Current175 mA
H-C Voltage750 V

Audio Performance

Key Features
  • High vacuum diode
  • Damper diode in television sweep circuits
  • Skirted miniature top cap

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Tube Voltage Drop22 V———300 mA

Application Notes

Power rectifier operation is not recommended. For operation in a 525-line, 30-frame system as described in Standards of Good Engineering Practice for Television Broadcasting Stations.

Datasheets

Datasheet: 6BL4.pdf

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

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