Tube-number record
5993
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BrandBendix Red Bank
ClassFull-wave rectifier
BaseNoval (B9A)
Filament6.3 V @ 800 mA
Construction
Primary TypeRectifier
EnvelopeT-6 1/2
Sections2
Filament / Heater
Warm-up Time45s
Heater NotesVoltage should not fluctuate more than +/- 5%
Absolute Maximum Ratings
Plate Voltage1500 V
Cathode Current75 mA
H-C Voltage500 V
Audio Performance
Key Features
- Reliable vacuum tube
- Aircraft, military and industrial applications
- Four-pillar mount structure
- Heavy gauge heater construction
- Pure alumina insulator
- Large area cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Capacitor Input Filter | 325 V | — | — | — | 70 mA |
| Choke Input Filter | 450 V | — | — | — | 70 mA |
Application Notes
The tube is designed to replace the 6X4 in applications where severe environmental conditions are encountered, especially in airborne equipment. Provides 10,000 hours life when used conservatively.
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