6GK7
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BrandCanadian General Electric
ClassHigh gain pentode
Base9-Pin Miniature
Filament6.3V @ 300mA
Construction
Primary TypePentode
EnvelopeT-6.5
Base MaterialGlass
SectionsSingle
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation3 W
Grid 2 Voltage330 V
H-C Voltage200 V
Audio Performance
Key Features
- Dual control feature
- Sharp, semi-remote, or remote cut-off operation
- Low control grid to plate capacitance
- Internal Shield
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Sharp Cutoff (135V Supply) | 135V | 9500 | 275000 | - | 7mA |
| Sharp Cutoff (270V Supply) | 270V | 9500 | 750000 | - | 8mA |
| Semi-Remote Cutoff (E3=+5V) | 135V | 10500 | 140000 | - | 9.25mA |
| Remote Cutoff (E3=+5V) | 270V | 10500 | 300000 | - | 9.5mA |
Application Notes
The dual control feature permits operation as a sharp, semi-remote, or remote cut-off pentode depending on B supply and AGC voltage applied to grid 3.
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