Tube-number record
7DJ8
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7DJ8 is a tube type in the TubeDatabase archive (class: Double Triode). Recorded specifications: brand Rogers, construction Dual triode, socket Noval (B9A), maximum plate voltage 130 V, and maximum plate dissipation 1.8 W. The archive does not yet hold a photographed example of this type.
BrandRogers
ClassDouble Triode
BaseNoval (B9A)
Filament7 V @ 300 mA
Construction
Primary TypeDual triode
EnvelopeT 6-1/2
Sections2
Filament / Heater
Absolute Maximum Ratings
Plate Voltage130 V
Plate Dissipation1.8 W
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Each section | 90 V | 12500 | — | 33 | 15 mA |
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.
Datasheets
Datasheet: 7DJ8.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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