25DQ6A
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BrandTung-Sol
ClassBeam Power Pentode
Base7 Pin Octal
Filament25V @ 0.3mA
Construction
Primary TypePentode
EnvelopeT-12
Base MaterialShort Medium-Shell
Sections1
Filament / Heater
Heater NotesAC OR DC
Absolute Maximum Ratings
Plate Voltage700 V
Plate Dissipation15 W
Grid 2 Voltage200 V
Grid 1 Voltage-50 V
Cathode Current140 mA
H-C Voltage200 V
Audio Performance
Key Features
- High-perveance
- Horizontal deflection amplifier
- Controlled heater warm-up
- Skirted miniature cap
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier (Condition 1) | 60V | - | - | - | 200mA |
| Class A Amplifier (Condition 2) | 150V | - | - | 4.1 | - |
| Class A Amplifier (Condition 3) | 250V | 6600 | 20900 | - | 75mA |
Application Notes
Designed for use as a horizontal deflection amplifier tube in high efficiency deflection circuits of television receivers.
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