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Power - TV Horizontal Output (sweep) ·BeamPower

28GB5

Beam power pentode for television horizontal deflection amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
9
Nominal heater
28 V / 300 mA

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
9
Nominal heater voltage
28 V
Nominal heater current
300 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 0

Beam Power

X-ray radiationInterelectrode capacitances
Max plate voltage
275 V
Max screen voltage
275 V
Max plate dissipation
17 W
Max screen dissipation
5 W
Max cathode current
275 mA

Horizontal sweep: peak positive pulse plate voltage 7700 V; 28 V/300 mA heater.

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

1970 Sylvania Technical Manual

Published operating points and test conditions from this source.

SECTION 0

Beam Power

Other

  • Maximum plate voltage

    275 V

    Maximum DC plate voltage

  • Peak plate current

    360 mA

    Peak plate current at stabilized operation

Characteristic

  • Plate Voltage

    230 V

    Typical supply voltage