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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

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A1 Amplifier (Fixed Bias)45V7501500000-0.75mA
Class A1 Amplifier (Resistor Bias)67.5V7502000000-0.75mA

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