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

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Tube-number record

6HJ8

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BrandSYLVANIA
ClassDIODE PENTODE
BaseNoval (B9A)
Filament6.3 V @ 450 mA

Construction

Primary TypeMulti-section
EnvelopeT-6 1/2
Base MaterialSmall Button 9-Pin
Sections2

Filament / Heater

Heater NotesSeries or Parallel operation; Heater warm-up time is 11 seconds.

Absolute Maximum Ratings

Plate Voltage330 V
Plate Dissipation3.2 W
Grid 2 Voltage330 V
Cathode Current5 mA
H-C Voltage200 V

Audio Performance

Key Features
  • Miniature diode pentode
  • Sharp cutoff pentode section
  • High perveance diode

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A1 Amplifier125 V9300200000—11.5 mA

Application Notes

The pentode section has sharp cutoff characteristics and may be used as an IF or AGC amplifier. The high perveance diode can be used as an RF detector, video detector or dc restorer.

Datasheets

Datasheet: 6HJ8.pdf

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

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