1AJ2

High-voltage television flyback/EHT rectifier designed to convert horizontal-output transformer pulses into the DC accelerating supply required by the CRT.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 12EL
Socket code: -
Base pins: 12
Nominal heater: 1.25 V / 200 mA

Description

1AJ2 is a Rectifier device. High-voltage diode/half-wave rectifier for television flyback or other high-voltage service.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 12EL
Socket code: -
Base pins: 12
Nominal heater voltage: 1.25 V
Nominal heater current: 200 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

12EL - 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: 26000 V
Rectifier nominal output current: 0.5 mA
Rectifier peak forward current: 50 mA
Rectifier forward voltage drop: 140 V

Primary promoted rectifier values from flyback-voltage rectifier service; DC inverse limit 22 kV retained as parameter.

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

Filament Voltage
1.25 V
Nominal
Filament Current
200 mA
Nominal
InversePlateVoltageTotalDcAndPeak
26 kV
FlybackVoltageRectifier
InversePlateVoltageDc
22 kV
FlybackVoltageRectifier
Peak Plate Current
50 mA
FlybackVoltageRectifier
DcOutputCurrent
0.5 mA
FlybackVoltageRectifier
FlybackPulseDutyCycle
15 %
525Line30FrameTV;NotToExceed

Capacitance

Plate To All Capacitance
1.8 pF
WithoutExternalShield;Approx

Characteristic

Tube Voltage Drop
140 V
PlateCurrent=7mA;Approx

Data set 02

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Filament/heater voltage
1.25 V
Filament/heater current
200 mA
Maximum total DC-plus-peak inverse voltage
- to 30000 V
FlybackRectifier
Maximum steady-state peak plate current
50 mA
FlybackRectifier
Maximum DC output current
0.5 mA
FlybackRectifier

Capacitance

Plate-to-filament/heater capacitance
1.8 pF
Approximate