Tube-number record
6HK8
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6HK8 is a tube type in the TubeDatabase archive (class: Medium-Mu Twin Triode). Recorded specifications: brand Toshiba, construction Dual triode, socket Noval (B9A), maximum plate voltage 150 V, and maximum plate dissipation 2 W. The archive does not yet hold a photographed example of this type.
BrandToshiba
ClassMedium-Mu Twin Triode
BaseNoval (B9A)
Filament6.3 V @ 400 mA
Construction
Primary TypeDual triode
EnvelopeT6-1/2
Sections2
Filament / Heater
Heater NotesUnipotential Cathode
Absolute Maximum Ratings
Plate Voltage150 V
Plate Dissipation2 W
Cathode Current20 mA
H-C Voltage200 V
Audio Performance
Key Features
- High transconductance
- Low noise
- Low interelectrode capacitance
- Designed for Cascode Amplifier use
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier (Each section) | 90 V | 8000 | 4500 | 36 | 8.5 mA |
| Cascode Amplifier | 180 V | 9500 | — | — | 12 mA |
| Mixer | 100 V | 4200 | — | — | 7 mA |
Application Notes
Specifically designed for use as a cascode amplifier in high-gain TV tuners and as RF amplifier/frequency converter for FM receivers.
Datasheets
Datasheet: 6HK8.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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