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3EW1

Compact Cintel electrostatic cathode-ray instrument tube with electrostatic focusing and deflection, operating at up to about 4 kV final-anode voltage and a small precision display screen.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: B12A
Base pins: -
Nominal heater: 4 V / 1 A

Description

3EW1 is a oscilloscope tube using electrostatic focus and electrostatic deflection. The datasheet publishes heater data, screen characteristics, electrode capacitances, maximum ratings, and representative operating conditions.

Socket description

Duodecal 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B12A
Base pins: -
Nominal heater voltage: 4 V
Nominal heater current: 1 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

Cathode Ray

X-ray radiationInterelectrode capacitances

Max plate voltage: 4000 V

CRT maximum electrode voltage promoted where published; screen, focusing, deflection, capacitance and operating data preserved as parameters.

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

196X Cintel

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

Heater voltage
4 V
Heater current
1 A
Focusing method
Electrostatic
Deflection method
Electrostatic
Screen fluorescence
White
Screen persistence
Short
Minimum useful screen diameter
55 mm
Base
B.12.B.
Modulator capacitance
13 pF
InterelectrodeCapacitance
Cathode capacitance
12 pF
InterelectrodeCapacitance
X plate capacitance
21 pF
InterelectrodeCapacitance
Y plate capacitance
21 pF
InterelectrodeCapacitance

Other

Maximum final anode voltage
4000 V