Tube-number record
6BK7-B
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6BK7-B 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 2.7 W. The archive does not yet hold a photographed example of this type.
BrandGeneral Electric
ClassTwin Triode
BaseNoval (B9A)
Filament6.3 V @ 0.45 mA
Construction
Primary TypeDual triode
EnvelopeT-6 1/2
Base MaterialGlass
Sections2
Filament / Heater
Warm-up Time11s
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation2.7 W
Grid 1 Voltage-50 V
H-C Voltage200 V
Audio Performance
Key Features
- High gain
- Low noise figure
- Cascode amplifier
- Miniature construction
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier (Each Section) | 150 V | 9300 | 4600 | 43 | 18 mA |
Application Notes
Designed primarily for use as a cascode amplifier at frequencies below approximately 300 megacycles. Especially useful as RF amplifier in VHF TV tuners or IF preamplifier in UHF tuners.
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