OZ4A

Heaterless gas-filled full-wave rectifier for vibrator-type automotive and battery-operated supplies. It provides useful DC output without a heater circuit, simplifying compact vehicle power converters.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 4R
Socket code: IO
Base pins: 8
Nominal heater: -

Description

Full-wave gas rectifier for vibrator-type power supplies.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 4R
Socket code: IO
Base pins: 8
Nominal heater voltage: -
Nominal heater current: -
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

4R - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN3P1	A	P — Plate (Anode) Source distinguishes P1; stored with canonical P element	Unverified EIA Base Connections, printed page 127, 4R
PIN5P2	A	P — Plate (Anode) Source distinguishes P2; stored with canonical P element	Unverified EIA Base Connections, printed page 127, 4R
PIN8K	A	K — Cathode	Unverified EIA Base Connections, printed page 127, 4R

Section ratings

2 physical sections, each with unique specifications.

Section 1

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier peak inverse voltage: 880 V
Rectifier nominal output current: 100 mA
Rectifier peak forward current: 330 mA
Rectifier forward voltage drop: 24 V

Full-wave gas rectifier; ratings are per plate where stated.

Section 2

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier peak inverse voltage: 880 V
Rectifier nominal output current: 100 mA
Rectifier peak forward current: 330 mA
Rectifier forward voltage drop: 24 V

Second physical rectifier section; promoted electrical properties populated from identical section.

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

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Peak inverse plate voltage
880 V
PerPlate
Peak starting-supply voltage
300 V
PerPlate
Peak plate current
330 mA
PerPlate
Peak plate supply voltage
440 V
VibratorSupply;CapacitorInputFilter;PerPlate
Filter-input capacitor
8 uF
VibratorSupply;CapacitorInputFilter
Total effective plate-supply impedance
600 ohm
VibratorSupply;CapacitorInputFilter;PerPlate
DC output voltage
310 V
VibratorSupply;CapacitorInputFilter
DC output current
100 mA
VibratorSupply;CapacitorInputFilter
Minimum plate-supply impedance
300 ohm
PerPlate

Characteristic

Tube voltage drop
24 V
110mA;PerPlate