2CN3A

Four-second warm-up high-voltage vacuum rectifier for television flyback power supplies. Its controlled warm-up and specialized insulation support picture-tube accelerating-voltage generation.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 1.8 V / 900 mA

Description

Four-second warm-up half-wave high-voltage vacuum rectifier; 2-volt heater version of 3CN3A.

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: 900 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: 38000 V
Rectifier nominal output current: 2.2 mA
Rectifier peak forward current: 110 mA
Rectifier forward voltage drop: 60 V
Rectifier warm-up time: 4 s

Electrical characteristics of 3CN3A except published 2CN3A 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

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Heater voltage
1.8 V
Heater current
900 mA
Heater warm-up time
4 s
Peak inverse plate voltage total DC plus peak
38000 V
PulsedRectifier
Maximum DC component of inverse plate voltage
30000 V
PulsedRectifier
Peak plate current
110 mA
PulsedRectifier
Average plate current
2.2 mA
PulsedRectifier

Characteristic

Tube voltage drop
60 V
PlateCurrent=7mA

Capacitance

Plate-to-heater/cathode/shield capacitance
1.6 pF

Application

Application
Color/monochrome television high-voltage rectifier