Tube-number record
6146B/8298A
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BrandRCA
ClassBeam Power Tube
BaseOctal
Filament6.3 V @ 1.125 mA
Construction
Primary TypeBeam tetrode / beam power
EnvelopeGlass
Base MaterialSmall-Wafer Octal with Sleeve
SectionsSingle
Filament / Heater
Heater NotesRCA Dark Heater with 5- to 8-volt range for mobile use
Absolute Maximum Ratings
Plate Voltage750 V
Plate Dissipation35 W
Grid 2 Voltage250 V
Grid 1 Voltage-150 V
Cathode Current220 mA
H-C Voltage135 V
Audio Performance
Power Output148 W
Key Features
- Dark Heater
- Controlled Zero-Bias Plate Current
- High Power Sensitivity
- Unilaterally Interchangeable with 6146, 6146A, and 8298
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Power Amplifier & Oscillator Class C Telegraphy (ICAS) | 750 V | 7000 | — | 4.5 | 160 mA |
| AF Power Amplifier & Modulator Class AB1 Push-Pull (ICAS) | 750 V | — | 7200 | — | 125 mA |
| Plate-Modulated RF Power Amplifier Class C Telephony (ICAS) | 600 V | — | — |
Application Notes
Designed for RF Power Amplifier and Oscillator service up to 175 Mc, and as AF Power Amplifier/Modulator in mobile and fixed equipment.
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