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719A

Air-cooled special-purpose heater-cathode diode rated for 25 kV peak inverse voltage and 10 A peak current.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B4A
Base pins: 4
Nominal heater: 7 V / 7 A

Description

The 719A is an air-cooled, heater-cathode special-purpose diode rated for 25 kV peak inverse anode voltage, 10 A peak anode current, 0.5 A average anode current, and 75 W anode dissipation.

Socket description

4-contact B4A physical base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B4A
Base pins: 4
Nominal heater voltage: 7 V
Nominal heater current: 7 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

1 physical section, each with unique specifications.

Section 1

Diode

X-ray radiationInterelectrode capacitances

Max plate dissipation: 75 W
Rectifier peak inverse voltage: 25000 V
Rectifier nominal output current: 500 mA
Rectifier peak forward current: 10 A

Special-purpose diode row extracted from the Western Electric summary table.

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

1956 Western Electric Tubes

Published operating points and test conditions from this source.

SECTION 1

Diode

Construction

Cooling method
Air

Other

Peak inverse anode voltage
25000 V
Peak anode current
10 A
Average anode current
500 mA
Anode dissipation
75 W

Characteristics

Anode-cathode capacitance
7.2 pF