Tube-number record
GU-71B
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ClassPentode
Filament12.6 V @ 6.8 mA
Construction
Primary TypePentode
Envelopemetal-to-ceramic
Sections1
Filament / Heater
Materialoxide-coated
Warm-up Time210s
Heater Notesindirectly heated
Absolute Maximum Ratings
Plate Voltage3500 V
Plate Dissipation1500 W
Grid 2 Voltage400 V
Grid 1 Voltage-100 V
Audio Performance
Power Output1300 W
Key Features
- Indirectly heated
- Metal-to-ceramic envelope
- Single-sideband power amplification
- Forced air cooling
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class AB amplification | 3000 V | 62000 | — | — | 850 mA |
Application Notes
Used for single-sideband power amplification and for power amplification at frequencies up to 75 MHz in stationary general-purpose RF equipment.
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