Tube-number record
859
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BrandAmperex
ClassTriode
Construction
Primary TypeTriode
EnvelopeWater Cooled Anode
Sections1
Filament / Heater
MaterialTungsten
Absolute Maximum Ratings
Plate Voltage20000 V
Plate Dissipation20000 W
Grid 1 Voltage-3000 V
Cathode Current3000 mA
Audio Performance
Power Output40000 W
Key Features
- Water Cooled
- Low inter-electrode capacitance
- Tungsten Filament
- High powers at radio frequencies
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| A.F. Power Amplifier and Modulator Class B | 12000 V | 8000 | 1250 | 36 | 600 mA |
| R.F. Power Amplifier Class B Telephony | 15000 V | 8000 | 2750 | 36 | 1500 mA |
| Plate Modulated R.F. Power Amplifier Class C Telephony | 10000 V | 8000 | 3800 | 36 |
Application Notes
Cooling: A water flow of 8 to 15 gallons per minute must start before the application of any voltages and should be continued for at least 2 minutes after removal of voltages. The water temperature at the outlet must not exceed 70° C.
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