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3ALP1

Compact electrostatic cathode-ray instrument tube with published deflection sensitivity, grid-control ratings, and screen-dissipation limits, intended for precision waveform and measurement displays.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 310 mA

Description

Cathode-ray tube intended for oscilloscope/display service. Philips 3ALP1; 3ALPT PHILIPS ELECTRON DEVICES LTD 3ALP7 3ALPTI DESCRIPTION Cathode ray tube for oscilloscopes ELECTRICAL DATA Heating Heater voltage 63V .Heater current 0.31 A Focusing method electrostatic Deflection method double electrostatic Dl 02 symmetrical D3 D4

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: 6.3 V
Nominal heater current: 310 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

No fixed ratings are recorded for this section.

Published electrical values are also captured in parameter rows.

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

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

Heater current
310 mA
.Heater current 0.31 A
Grid No.2 voltage
800 V
Grid No.2 voltage = 800 V
Grid No. 3 voltage {“’“"'
1000 V
Grid No. 3 voltage {“’“"' 1000 V
Peak voltage between deflection plates D4 and D4 max
450 V
Peak voltage between deflection plates D4 and D4 max. 450 V-
Screen dissipation max
19.4 mW
Screen dissipation max.. 19.4 mW/sq. inch
Grid No. 1 circuit resistance max
0.5 MΩ
Grid No. 1 circuit resistance max. 0.5 MQ
Grid No. 3 voltage
800 V
Grid No. 3 voltage 800 V
Grid No. 2 voltage _ 200 to
300 V
Grid No. 2 voltage _ 200 to 300 V
Dy D,
160 V
Dy D, 160 V/inch
Published electrical value
100 V
100 V/inch