3A2

High-voltage pulse rectifier diode for television scanning circuits. It converts flyback pulses into the high DC accelerating voltage required by the picture tube.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 3.15 V / 220 mA

Description

High-voltage pulse rectifier diode for television scanning circuits.

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: 3.15 V
Nominal heater current: 220 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: 18000 V
Rectifier nominal output current: 1.5 mA
Rectifier peak forward current: 80 mA

Pulsed rectifier service.

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

Peak inverse plate voltage
18000 V
PulsedRectifier
Peak plate current
80 mA
PulsedRectifier
Average plate current
1.5 mA
PulsedRectifier

Capacitance

Plate to heater cathode and internal shield
1 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

HEATER VOLTAGE
3.15 V
Maximum Ratings | HEATER VOLTAGE 3.15 VOLTS
MAXIMUM AVERAGE PLATE CURRENT
1.5 mA
Maximum Ratings | MAXIMUM AVERAGE PLATE CURRENT 1.5 MA.