E702B

Ruggedized direct-view storage tube recommended for airborne and radar applications, providing persistent stored electronic displays under demanding operating conditions.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 2
Base: E31-36
Socket code: THIRTYFIVAR31
Base pins: 31
Nominal heater: 6.3 V / 600 mA

Description

Direct-view storage tube with ruggedized construction recommended for airborne and other radar applications.

Socket description

Thirtyfivar 31-contact small-button base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: E31-36
Socket code: THIRTYFIVAR31
Base pins: 31
Nominal heater voltage: 6.3 V
Nominal heater current: 600 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

E31-36 - 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

Cathode Ray

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Writing gun

Section 2

Cathode Ray

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Flood gun

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

1971 English Electric Valve

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

Writing gun heater current
600 mA
WritingGun
Flood gun heater current
600 mA
FloodGun

Other

Viewing screen voltage maximum
12 kV
FloodGun