5KE8, 6KE8
0 Tubes in archive
BrandRCA
ClassTriode-Pentode
BaseNoval (B9A)
Filament5.6V @ 0.45mA
Construction
Primary TypeMulti-section
EnvelopeT6-1/2
Base MaterialSmall-Button Noval 9-Pin
Sections2
Filament / Heater
Warm-up Time11s
Heater NotesRCA Dark Heater; 5KE8 has controlled 11-second warm-up time
Absolute Maximum Ratings
Plate Voltage280 V
Plate Dissipation2 W
Grid 2 Voltage280 V
Cathode Current20 mA
H-C Voltage200 V
Audio Performance
Key Features
- Dark Heater
- Frame-Grid Pentode
- Medium-mu Triode
- Sharp-cutoff Pentode
- High Pentode Transconductance
- High Mixer Gain
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section Class A1 | 125V | 8000 | 5000 | 45 | 13mA |
| Pentode Section Class A1 | 125V | 12000 | 125000 | - | 10mA |
Application Notes
Designed primarily for use as combined oscillator-mixer tubes in television receivers.
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