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Diode (NOT rectifier) ·Rectifier

2BA2

Miniature directly heated high-voltage focus rectifier designed for television CRT focus-supply service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
9
Nominal heater
1.8 V / 300 mA

Description

Miniature directly heated focus rectifier for high-voltage television 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
1.8 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 1

Rectifier

X-ray radiationInterelectrode capacitances
Rectifier peak inverse voltage
8250 V
Rectifier nominal output current
0.6 mA
Rectifier peak forward current
50 mA
Rectifier forward voltage drop
55 V

Published source ratings and characteristics promoted where applicable; additional electrical and operating data retained as parameters.

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

1964 RMA EIA

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Total DC+peak inverse voltage maximum

    8250 V

  • DC inverse voltage maximum

    7000 V

  • Peak plate current maximum

    50 mA

  • Average plate current maximum

    0.6 mA

Application

  • Application

    Focus rectifier