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5AQP2

Five-inch special-purpose instrument CRT with electrostatic focusing and deflection and a P2 blue-green/green long-persistence screen. Its direct-view electrostatic beam system is suited to oscillographic and precision measurement displays.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: B14A
Base pins: -
Nominal heater: 6.3 V / 600 mA

Description

Five-inch special-purpose/instrument CRT with electrostatic focus, electrostatic deflection, and P2 phosphor (Blue-green / green afterglow, long persistence).

Socket description

Large readout/Nixie 14-contact base, 44.5 mm pin circle

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B14A
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

1 physical section, each with unique specifications.

Section 1

Cathode Ray

X-ray radiationInterelectrode capacitances

Max plate voltage: 4400 V

Published Sylvania CRT ratings, focus/deflection conditions, capacitances, cutoff/modulation values, and tolerance data retained where legible.

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

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

Focusing method
Electrostatic
Deflection method
Electrostatic
Heater voltage
6.3 V
Heater current
600 mA
Fluorescence
Blue-green / green afterglow
Persistence
Long
Deflection factor D1-D2
40 to 50 V/in
Deflection factor D3-D4
31.5 to 38.5 V/in
Modulation maximum
40 V
Line width maximum
0.03 in
Useful scan minimum
4 x 4 in
Pattern distortion at 100% useful scan maximum
2 %

Construction

Phosphor
P2
Faceplate construction
Clear

Application

Application
Oscilloscope / instrument / special-purpose display

Other

Anode-2 voltage maximum
4400 V
Anode-1 focus voltage maximum
1650 V
Grid-1 negative-bias maximum
-220 V
Grid-1 positive-bias maximum
0 V
Peak heater-cathode voltage maximum heater negative
200 V
Peak heater-cathode voltage maximum heater positive
200 V
Peak anode-2 to deflection-plate voltage maximum
400 V
Typical anode-2 voltage
2500 V
Typical focus voltage range
0 to 300 V
Grid cutoff range
-34 to -56 V
Anode-2 current maximum
400 uA
Grid-1 circuit resistance maximum
1.5 Mohm
Deflection-circuit resistance maximum
1 Mohm