E702E

Direct-view storage tube based on the E702A construction but selected for improved uniformity of erasure, supporting persistent electronic display and repeated write/erase operation.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

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

Description

Direct-view storage tube of the same construction as E702A, selected for improved uniformity of erasure.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: E31-36
Socket code: -
Base pins: 31
Nominal heater voltage: 6.3 V
Nominal heater current: -
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