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E81L

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BrandPhilips
ClassOutput Pentode
BaseNoval
Filament6.3V @ 375mA

Construction

Primary Typepentode
Envelopeglass
Base Materialglass
Sectionssingle

Filament / Heater

Heater NotesIndirect heating by A.C. or D.C.; series or parallel supply

Absolute Maximum Ratings

Plate Voltage210 V
Plate Dissipation4.5 W
Grid 2 Voltage210 V
Grid 1 Voltage-1.1 V
Cathode Current30 mA
H-C Voltage120 V

Audio Performance

Typical THD5%
Power Output1.4 W
Key Features
  • Special Quality (SQ)
  • Long life
  • Shock and vibration resistant
  • Telephone equipment quality

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Output Pentode210V110003000003620mA
Pre-amplifier210V10000400000-15mA

Application Notes

Specifically designed for use in telephone equipment with a life expectancy exceeding 10,000 hours.

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