328

Gas-filled double-anode rectifier designed principally for charging lead-acid batteries. Rated for approximately 650 mA DC output and 4 A peak current, with the low forward drop characteristic of gas-filled rectification.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: B4
Base pins: 4
Nominal heater: 1.9 V / 3 A

Description

Gas-filled double-anode rectifier for charging lead-acid batteries.

Socket description

European 4-pin base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B4
Base pins: 4
Nominal heater voltage: 1.9 V
Nominal heater current: 3 A
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

2 physical sections, each with unique specifications.

Section 1

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier peak inverse voltage: 90 V
Rectifier nominal output current: 650 mA
Rectifier peak forward current: 4 A
Rectifier forward voltage drop: 7 V
Rectifier warm-up time: 15 s

Promoted only where the locked section schema has a direct semantic match; additional published device-specific ratings, operating points, capacitances, life-test, pulse, RF, and rectifier data are retained in TUBE_SECTION_PARAMETER.

Section 2

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier peak inverse voltage: 90 V
Rectifier nominal output current: 650 mA
Rectifier peak forward current: 4 A
Rectifier forward voltage drop: 7 V
Rectifier warm-up time: 15 s

Second physical rectifier section; electrical properties populated from the documented 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

1963 Philips Electron Tubes Handbook V3

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

Filament heating time
15 s
IndustrialRectifier
Arc voltage drop
7 V
IndustrialRectifier
Ignition voltage
16 V
IndustrialRectifier

Other

Peak inverse anode voltage maximum
90 V
IndustrialRectifier
Average anode current maximum
650 mA
IndustrialRectifier
Peak anode current maximum
4 A
IndustrialRectifier
Recommended temperature range
-55 to +75 °C
IndustrialRectifier
Transformer RMS voltage
28 V
CircuitA
DC output voltage
13 V
CircuitA
DC output current
1.3 A
CircuitA

SECTION 2

Rectifier

Characteristic

Filament heating time
15 s
IndustrialRectifier
Arc voltage drop
7 V
IndustrialRectifier
Ignition voltage
16 V
IndustrialRectifier

Other

Peak inverse anode voltage maximum
90 V
IndustrialRectifier
Average anode current maximum
650 mA
IndustrialRectifier
Peak anode current maximum
4 A
IndustrialRectifier
Recommended temperature range
-55 to +75 °C
IndustrialRectifier
Transformer RMS voltage
28 V
CircuitA