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7868

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BrandSylvania
ClassPower Pentode
BaseNovar
Filament6.3V @ 800mA

Construction

Primary TypePentode
EnvelopeT-9
Base MaterialSmall Button Novar 9-Pin
SectionsSingle

Filament / Heater

Heater NotesParallel Operation

Absolute Maximum Ratings

Plate Voltage550 V
Plate Dissipation19 W
Grid 2 Voltage440 V
Cathode Current90 mA
H-C Voltage200 V

Audio Performance

Typical THD5%
Power Output44 W
Key Features
  • 9-pin Novar base
  • High fidelity audio amplifier utility
  • Low distortion
  • Relatively high power output

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Pentode Single-Ended Class A1300V1020029000-60mA
Pentode Push-Pull Class AB1450V---40mA
Ultra-Linear Operation Push-Pull400V---60mA

Application Notes

Two 7868's can deliver 44 watts power output with 5% THD in push-pull class AB1. For efficient operation, Grid No. 2 connections (Pins 1 and 7) should be tied together.

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