2AS2

Compactron high-voltage rectifier diode for television flyback power supplies. It converts line-output pulses into the high DC voltage required by the picture tube.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B9A
Base pins: 12
Nominal heater: 2.5 V / 330 mA

Description

Compactron high-voltage rectifier diode for television flyback power supplies.

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: 12
Nominal heater voltage: 2.5 V
Nominal heater current: 330 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: 30000 V
Rectifier nominal output current: 1 mA
Rectifier peak forward current: 80 mA
Rectifier forward voltage drop: 100 V

Peak inverse voltage uses total DC plus peak rating; 24 kV DC component is preserved in 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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

PeakInverseVoltageDCComponent
24000 V
FlybackRectifierService
PeakInverseVoltageTotalDCPeak
30000 V
FlybackRectifierService

Capacitance

Plate To Heater Cathode Shield Capacitance
1.4 pF

Data set 02

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Peak inverse voltage maximum
30000 V
FlybackRectifier
Average plate current maximum
1 mA
FlybackRectifier
Application
Compactron TV high-voltage rectifier
Section1

Data set 03

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Heater/filament voltage
2.5 V
Heater/filament current
330 mA
Peak inverse plate voltage total DC plus peak
30000 V
PulsedRectifier
Maximum DC component of inverse plate voltage
24000 V
PulsedRectifier
Peak plate current
80 mA
PulsedRectifier
Average plate current
1.5 mA
PulsedRectifier

Characteristic

Tube voltage drop
100 V
PlateCurrent=7mA

Application

Application
High-voltage half-wave pulsed rectifier
TelevisionFlyback