1AH5
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BrandPhilips
ClassDiode-Pentode
BaseMiniature button 7-pin
Construction
Primary TypeDiode-Pentode
EnvelopeGlass T5-1/2
Base MaterialGlass
Sections2
Filament / Heater
MaterialCoated
Absolute Maximum Ratings
Plate Voltage90 V
Plate Dissipation0.03 W
Grid 2 Voltage90 V
Grid 1 Voltage-0.2 V
Cathode Current0.25 mA
Audio Performance
Typical THD1.2%
Key Features
- Low microphony
- Battery operation
- Resistance-coupled amplifier
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Resistance-coupled amplifier (64V supply) | 64V | - | - | 52 | 0.032mA |
| Resistance-coupled amplifier (85V supply) | 85V | - | - | 62 | 0.05mA |
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