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4066-A

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BrandStandard Valves
ClassPower Pentode
BaseStandard British 7-pin
Filament4V @ 2mA

Construction

Primary TypePentode
EnvelopeGlass
SectionsSingle

Filament / Heater

Heater NotesIndirectly heated oxide coated, Constant voltage type

Absolute Maximum Ratings

Plate Voltage250 V
Grid 2 Voltage250 V
Cathode Current40 mA

Audio Performance

Typical THD10%
Power Output2.75 W
Key Features
  • Indirectly heated
  • Oxide coated
  • Constant voltage type

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Standard250V100006000060029mA
Reduced Voltage 1200V-80000-24.5mA
Reduced Voltage 2150V-100000-23mA

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