1AY2A

Shielded filamentary television flyback/EHT rectifier that converts horizontal-output pulses into CRT accelerating voltage while incorporating measures to reduce X-radiation during high-voltage operation.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: DUOPIN2
Base pins: 2
Nominal heater: 1.25 V / 200 mA

Description

Directly heated half-wave high-voltage flyback rectifier for television picture-tube anode supplies. Electrical ratings and characteristics were taken from the supplied RCA manual excerpt, including the published heater variant where applicable.

Socket description

Duopin 2-contact base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: DUOPIN2
Base pins: 2
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: 26000 V
Rectifier nominal output current: 0.5 mA
Rectifier peak forward current: 50 mA
Rectifier forward voltage drop: 110 V

Absolute maximum total DC+peak inverse plate voltage 26 kV; 110 V approximate drop at 7 mA; X-radiation rating published.

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
22000 V
AbsoluteMaximum
Filament Voltage Absolute Maximum
1.45 V
Filament Voltage Absolute Minimum
1.05 V
X Ray Radiation Maximum
0.5 mR/hr
Within maximum ratings

Characteristic

Tube Voltage Drop
110 V
Ib=7mA DC

Data set 02

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Peak Inverse Plate Voltage
26000 V
FlybackRectifier
Peak Plate Current
50 mA
Average Plate Current
0.5 mA
Filament Voltage Minimum
1.05 V
Filament Voltage Maximum
1.45 V

Characteristic

Tube Voltage Drop
100 V
PlateCurrent=7mA
X-Radiation Maximum
0.5 mR/hr
LotSamplingMaximum

Capacitance

Plate to Filament Capacitance
1.4 pF