Tube-number record
6BK7
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6BK7 is a tube type in the TubeDatabase archive (class: Twin Triode). Recorded specifications: brand Sylvania, construction Dual triode, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 2.7 W. The archive does not yet hold a photographed example of this type.
BrandSylvania
ClassTwin Triode
BaseNoval (B9A)
Filament6.3 V @ 450 mA
Construction
Primary TypeDual triode
EnvelopeT-6 1/2
Sections2
Filament / Heater
Heater NotesUnipotential cathode
Absolute Maximum Ratings
Plate Voltage300 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier (Section 1) | 100 V | 6100 | 6100 | 37 | 9 mA |
| Class A Amplifier (Section 2) | 150 V | 8300 | 4700 | 40 | 18 mA |
Application Notes
Shielding between sections minimizes internal capacity coupling. When operated as a cascode amplifier and the two sections are connected in series, the heater-cathode voltage of the grounded grid stage may be as high as 250 volts maximum with the heater negative with respect to the cathode.
Datasheets
Datasheet: 6BK7.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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