Tube-number record
6840
0 archive entries
6840 is a tube type in the TubeDatabase archive (class: Twin Triode). Recorded specifications: brand General Electric, construction Dual triode, base Glass, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 4 W. The archive does not yet hold a photographed example of this type.
BrandGeneral Electric
ClassTwin Triode
BaseNoval (B9A)
Filament6.3 V @ 800 mA
Construction
Primary TypeDual triode
EnvelopeT-6 1/2
Base MaterialGlass
Sections2
Filament / Heater
Heater NotesSeries or Parallel connection
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation (Each Section) | 250 V | 6700 | 3000 | 20 | 14 mA |
Application Notes
The 6840 is primarily designed for service in computer applications, specifically frequency-divider service. It incorporates an extremely high zero-bias plate current and maintains emission after long periods of operation under cutoff conditions.
Datasheets
Datasheet: 6840.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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