2BJ2

High-voltage rectifier for television flyback/EHT service. It rectifies horizontal-output transformer pulses to generate CRT accelerating voltage, with the heater system operating at high potential.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 2.3 V / 300 mA

Description

Heater-cathode half-wave high-voltage vacuum rectifier for television pulsed-rectifier 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: 2.3 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: 20000 V
Rectifier nominal output current: 1 mA
Rectifier peak forward current: 80 mA
Rectifier forward voltage drop: 80 V

High-voltage pulsed rectifier.

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

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Heater/filament voltage
2.3 V
Heater/filament current
300 mA
Peak inverse plate voltage total DC plus peak
20000 V
PulsedRectifier
Peak plate current
80 mA
PulsedRectifier
Average plate current
1 mA
PulsedRectifier

Characteristic

Tube voltage drop
80 V
PlateCurrent=7mA

Application

Application
High-voltage half-wave pulsed rectifier
TelevisionFlyback