25W6GT
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BrandTung-Sol
ClassBeam Pentode Power Amplifier
BaseOctal
Filament25V @ 0.3mA
Construction
Primary TypeBeam Pentode
EnvelopeT-9
Base MaterialGlass
SectionsSingle
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation10 W
Grid 2 Voltage150 V
Grid 1 Voltage250 V
Cathode Current40 mA
H-C Voltage200 V
Audio Performance
Typical THD10%
Power Output3.8 W
Key Features
- Coated Unipotential Cathode
- Any Mounting Position
- Vertical Scanning Output Tube
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier (Fixed Bias) | 110V | 8000 | 13000 | - | 49mA |
| Class A1 Amplifier (Cathode Bias) | 200V | 8000 | 28000 | - | 46mA |
| Triode Connection | 225V | 3800 | 1600 | 6.2 | 22mA |
Application Notes
Designed specifically for use as a vertical scanning output tube in television receivers. For operation in 525-line, 30-frame systems, the duty cycle of the voltage pulse must not exceed 15 percent of a scanning cycle.
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