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Power - TV Vertical Output ·Triode

6S4

Medium-mu power triode designed specifically for television vertical-deflection amplification. Moderate plate resistance, several watts of dissipation, and high pulse-voltage capability make it suitable for frame-output circuits rather than ordinary small-signal amplification.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 600 mA

Description

The Westinghouse 6S4 is a medium-mu triode for television vertical-deflection amplifier service.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B9A
Base pins
9
Nominal heater voltage
6.3 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
3600 Ω
Transconductance
0.0045 S
Amplification factor
16
Max plate voltage
500 V
Max plate dissipation
7.5 W
Max cathode current
30 mA

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater voltage

    6.3 V

  • Heater current

    600 mA

  • Plate voltage

    500 V

    Typical operating conditions

  • Plate current

    18 mA

    Typical operating conditions

Data set 02

1965 Westinghouse Data Book

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater Voltage

    6.3 V

  • Heater Current

    600 mA

  • Plate Voltage

    250 V

  • Grid Voltage

    -8 V

  • Plate Current

    26 mA

  • Transconductance

    4500 uS

  • Amplification Factor

    16 ratio

  • Plate Resistance

    3600 ohm

Other

  • Maximum Plate Voltage

    500 V

    VerticalDeflection

  • Maximum Peak Positive Plate Voltage

    2200 V

    Pulse

  • Maximum Plate Dissipation

    7.5 W

  • Maximum Average Cathode Current

    30 mA

  • Maximum Peak Cathode Current

    105 mA