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7DJ8

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BrandRogers
ClassDouble Triode
BaseE 9-1
Filament7V @ 300mA

Construction

Primary TypeDouble Triode
EnvelopeT 6-1/2
Sections2

Filament / Heater

Absolute Maximum Ratings

Plate Voltage130 V
Plate Dissipation1.8 W
Grid 1 Voltage-50 V
Cathode Current25 mA
H-C Voltage80 V

Audio Performance

Key Features
  • High transconductance
  • Low noise
  • Unipotential cathode
  • Internal shield

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Each section90V12500-3315mA

Application Notes

Designed for use as cascode amplifier in television receiver tuners. A voltage divider should be used for the grid of the grounded-grid section to avoid exceeding maximum plate voltage.

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