1BC2B

Shielded filamentary television flyback/EHT rectifier designed to generate CRT accelerating voltage from horizontal-output pulses, with built-in X-radiation shielding for high-voltage operation.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 1.25 V / 200 mA

Description

The 1BC2-B is a filamentary diode designed as the high-voltage rectifier in television receivers, primarily for flyback power supplies, with built-in X-radiation shielding and controls to reduce radiation output.

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: 1.25 V
Nominal heater current: 200 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

Max cathode current: 0.5 mA
Rectifier peak inverse voltage: 18000 V
Rectifier nominal output current: 0.5 mA
Rectifier peak forward current: 45 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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Peak inverse plate voltage DC component
15000 V
FlybackRectifier
Peak inverse plate voltage total DC and peak
18000 V
FlybackRectifier
Steady state peak plate current
45 mA
FlybackRectifier
DC output current
0.5 mA
FlybackRectifier

Capacitance

Interelectrode capacitance
1 pF