5BQ7A
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BrandTUNG-SOL
ClassDouble Triode
Base9 PIN MINIATURE NOVAL
Filament5.6V @ 450mA
Construction
Primary TypeDouble Triode
EnvelopeGlass
Base MaterialButton
Sections2
Filament / Heater
MaterialCoated Unipotential Cathode
Warm-up Time11s
Heater NotesAC OR DC
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation2 W
Cathode Current20 mA
H-C Voltage200 V
Audio Performance
Key Features
- Medium-mu double triode
- Controlled heater warm-up cycle
- High transconductance
- Low input capacitance
- Low input loading
- Low plate to cathode capacitance
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier - Each Triode | 150V | 6400 | 6100 | 39 | 9mA |
| Push-Pull RF Grounded Grid | 150V | - | - | - | 10mA |
Application Notes
Intended for use as the first RF amplifier tube in tuners of VHF television receivers or as a low noise IF pre-amplifier tube in UHF television receivers employing a crystal mixer.
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