6445
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BrandAmperex
ClassForced Air-Cooled Triode
BaseKovar ring grid connection
Construction
Primary TypeTriode
EnvelopeGlass-to-Metal
Base MaterialPowdered glass stem
SectionsSingle
Filament / Heater
MaterialTungsten
Absolute Maximum Ratings
Plate Voltage12500 V
Plate Dissipation5000 W
Grid 1 Voltage-3000 V
Cathode Current2000 mA
Audio Performance
Power Output17000 W
Key Features
- Rugged powdered glass stem
- Kovar ring grid connection
- Lower grid lead inductance
- Strong conical internal grid support
- Shorter overall length
- Spiral filament
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| A.F. Power Amplifier Class B (Two Tubes) | 10000V | 7000 | - | 50 | 2500mA |
| R.F. Power Amplifier Class C Telephony | 8000V | - | - | 50 | 960mA |
| R.F. Power Amplifier Class C Telegraphy | 10000V | - | - | 50 | 1400mA |
Application Notes
The 6445 is an improved version of the standard type 892R. Rated air flow must be continuous during voltage application and for 5 minutes after removal.
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