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7XP2

Seven-inch five-gun oscilloscope CRT with electrostatic focusing and deflection. Each independently controllable gun scans the full screen, with electrostatic shielding minimizing interaction between simultaneous traces.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 5
Base: -
Socket code: B12A
Base pins: -
Nominal heater: 6.3 V / 600 mA

Description

The ETC 7XP2 is a seven-inch five-gun electrostatic-focus and deflection cathode-ray tube. Each gun is independently controllable and scans the full screen area, with electrostatic shielding to minimize interaction.

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: 6.3 V
Nominal heater current: 600 mA
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

5 physical sections, with 1 unique section. The remaining sections have identical specifications.

Section 1

Cathode Ray

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Representative row for identical electron-gun sections.

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

1961 Electronic Tube Corp

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

Heater voltage
6.3 V
Heater current nominal
600 mA
Maximum post-accelerator voltage
4400 V
Maximum accelerator voltage
2200 V
Maximum focusing voltage
1100 V
Maximum accelerator-to-deflection-electrode voltage
825 V
Maximum negative grid-1 bias magnitude
200 V
Maximum positive grid-1 bias
0 V
Maximum heater-to-cathode voltage magnitude
180 V
Typical post-accelerator voltage
4000 V
Typical accelerator voltage
2000 V
Typical focusing voltage
440 to 750 V
Typical grid-1 voltage
-67.5 to -22.5 V
Post-accelerator to accelerator ratio maximum
2
Modulation factor maximum
45 V
Line width A maximum
0.028 in
Line width B maximum
0.032 in
Deflection factor D1-D2 minimum
63 V/in
Deflection factor D1-D2 maximum
105 V/in
Deflection factor D3-D4 minimum
59 V/in
Deflection factor D3-D4 maximum
94 V/in

Construction

Focusing method
Electrostatic
Deflecting method
Electrostatic
Electron gun / beam count
5

Characteristic

Phosphor options
P1,P2,P7,P11