1AK4
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BrandRaytheon
ClassSubminiature Pentode
BaseNone (flexible leads)
Construction
Primary TypePentode
EnvelopeT-2x3 Glass
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage90 V
Grid 2 Voltage90 V
Cathode Current1 mA
Audio Performance
Key Features
- Filament type
- Fully shielded
- Tinned flexible leads
- Subminiature
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier (Fixed Bias) | 45V | 750 | 1500000 | - | 0.75mA |
| Class A1 Amplifier (Resistor Bias) | 67.5V | 750 | 2000000 | - | 0.75mA |
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