Tube-number record
7189-A
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BrandGeneral Electric
ClassPower Amplifier Pentode
BaseNoval (B9A)
Filament6.3 V @ 760 mA
Construction
Primary TypePentode
EnvelopeT-6 1/2 Glass
Base MaterialGlass
SectionsSingle
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage440 V
Plate Dissipation13.2 W
Grid 2 Voltage400 V
Cathode Current72 mA
H-C Voltage100 V
Audio Performance
Typical THD10%
Power Output5.7 W
Key Features
- Unilaterally interchangeable with 7189
- Higher screen-voltage rating than 7189
- High-fidelity amplifier applications
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 250 V | 11300 | 40000 | 19.5 | 48 mA |
| Push-Pull Class AB1 | 400 V | — | — | — | 105 mA |
Application Notes
Designed for audio-frequency power output stage of television and radio receivers and high-fidelity amplifiers.
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