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6661/6BH6

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BrandSylvania
ClassSharp cut-off pentode
BaseMiniature 7-pin (B7G)
Filament6.3V @ 150mA

Construction

Primary TypePentode
EnvelopeT-5 1/2
Sections1

Filament / Heater

Heater NotesDesigned specifically for use in mobile communications equipment. Capable of withstanding appreciable on-off cycling.

Absolute Maximum Ratings

Plate Voltage330 V
Plate Dissipation3.3 W
Grid 2 Voltage330 V
Grid 1 Voltage-55 V
H-C Voltage100 V

Audio Performance

Key Features
  • Mobile operation
  • Sharp cut-off
  • High reliability
  • Consistent electrical characteristics

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A1 Amplifier100V3400700000-3.6mA
Class A1 Amplifier250V46001400000-7.4mA

Application Notes

Specifically designed for mobile operation with supply voltage variations as encountered with automotive electrical systems.

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