25A6GT
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BrandHytron
ClassPower Pentode
BaseSmall Octal
Filament25V @ 0.3mA
Construction
Primary TypePentode
EnvelopeT-9
SectionsSingle
Filament / Heater
Heater NotesVoltage between negative end of heater and cathode should not exceed 90 volts DC.
Absolute Maximum Ratings
Plate Voltage180 V
Grid 2 Voltage135 V
H-C Voltage90 V
Audio Performance
Typical THD10%
Power Output2.75 W
Key Features
- Cathode type power pentode
- Universal AC-DC receiver application
- Bantam construction
- Small octal base
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Single Tube (Condition 1) | 95V | 2000 | 45000 | 90 | 20mA |
| Class A Single Tube (Condition 2) | 135V | 2450 | 35000 | 85 | 37mA |
| Class A Single Tube (Condition 3) | 180V | 2500 | 40000 | 100 | 38mA |
Application Notes
Especially adapted to universal AC-DC receivers or receivers operating directly from DC power lines. Power output is relatively large for the low voltages available. If resistance coupling is used, grid return resistance limited to 0.25 megohm (self-bias) or 0.1 megohm (fixed-bias).
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