6889
1 Tube in archive
BrandBendix
ClassReceiving Tubes
BaseOctal
Filament6.3V @ 1.2mA
Construction
Primary TypeBeam Power Amplifier
EnvelopeNonex Glass T-11
Base MaterialGlass filled Mica
Sections1
Filament / Heater
MaterialPure Tungsten
Warm-up Time45s
Heater NotesHelical heater with high purity aluminum oxide insulator
Absolute Maximum Ratings
Plate Voltage3000 V
Plate Dissipation30 W
Grid 2 Voltage850 V
Grid 1 Voltage5 V
Cathode Current125 mA
H-C Voltage450 V
Audio Performance
Key Features
- Hard glass bulb
- Tungsten stem seal
- Ceramic shield
- Pulse application conditioning
- High perveance
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode | 250V | 5400 | - | - | 74mA |
Application Notes
Designed for aircraft, military and industrial applications where high levels of vibration and shock are encountered. Avoid designs where the tube is subjected to all maximum ratings simultaneously.
