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DG42

Philips/Mullard DG-series cathode-ray instrument tube intended for oscillographic and measurement display, with manufacturer-defined electrostatic focusing, deflection, screen, and accelerating characteristics for type DG42.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: B8G
Base pins: -
Nominal heater: 6.3 V / 310 mA

Description

The Mullard DG42 is a high-vacuum electrostatic oscilloscope tube with an approximately 1.5-inch screen and green medium persistence phosphor.

Socket description

Loctal 8-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B8G
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

Max plate voltage: 1000 V

Electrostatic focusing/deflection CRT section; electrical/screen/deflection data retained 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

1951 Mullard Valve and Service Manual

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

Screen Colour / Persistence
Green, medium persistence
Focusing Method
Electrostatic
Deflecting Method
Double Electrostatic

Other

Anode Voltage
800 V
Focusing Electrode Voltage Minimum
200 V
Focusing Electrode Voltage Maximum
300 V

Data set 02

1957 Philips Receiving and Amplifying Tubes

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

Maximum Plate Voltage
400 V
Grid 2 Operating Voltage Minimum
200 V
Grid 2 Operating Voltage Maximum
300 V
Maximum Grid 2 Voltage
400 V

Characteristic

Focusing Method
Electrostatic
Deflection Method
Double electrostatic
Screen Variant
green, medium persistence

Data set 03

1963 Philips Electron Tubes Handbook V2

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

Accelerating-grid voltage
800 V
Focusing-grid voltage
200 to 300 V
Maximum accelerating-grid voltage
1000 V
Maximum focusing-grid voltage
400 V

Characteristic

Deflection sensitivity N1
0.25 mm/V
Deflection sensitivity N2
0.16 mm/V

Data set 04

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

Heating: indirect by A.C. or D.C. Ve
6.3 V
Published datasheet condition
Cg1
10 pF
Published datasheet condition
Cpq
5.3 pF
Published datasheet condition
Cpq = 5,3 pF Cp1p1?
0.6 pF
Published datasheet condition
Cpqe
5.3 pF
Published datasheet condition
Cpqe = 5,3 pF Cpopot
0.8 pF
Published datasheet condition
Cpz
4.5 pF
Published datasheet condition
Cpz = 4,5 pF Cpipit-peper
0.1 PF
Published datasheet condition
Epaisseur de la ligne ( Vg3
800 V
Published datasheet condition
Epaisseur de la ligne ( Vg3 =800V)
0.7 mm
Published datasheet condition
Betriebsdaten Vg3
800 V
Published datasheet condition
Vg2 = 200
-300 V
Published datasheet condition
_Vg«] = 0
-50 V
Published datasheet condition
Nt
0.25 mm
Published datasheet condition
No
0.16 mm
Published datasheet condition
1) Measured on a circle of
30 mm
Published datasheet condition
Mesuré & un cercle de
30 mm
Published datasheet condition
Gemessen an einem Kreis von
30 mm
Published datasheet condition
Cg1
7 pF
Published datasheet condition
Cg1 = 7,0 pF Cpo
2.8 pF
Published datasheet condition
Cp1
3.27 pF
Published datasheet condition
Cp1 = 3,27pF Cp1p1!
0.7 PF
Published datasheet condition
Cpyr
3.5 pF
Published datasheet condition
Cpyr = 3,5 pF Cp2pa!
0.9 PF
Published datasheet condition
Cp2
3 pF
Published datasheet condition
Epaisseur de la ligne ( Vg3
8007 V
Published datasheet condition
Epaisseur de la ligne ( Vg3 =8007V)
0.7 mm
Published datasheet condition
Vgt
50 V
Published datasheet condition
N4
0.25 mm
Published datasheet condition
N2
0.16 mm
Published datasheet condition
Va2
1000 V
Published datasheet condition
————la2
800 V
Published datasheet condition
7 i / : ] i
71 v
Published datasheet condition
AP
4 v
Published datasheet condition
Published value
4 V
Published datasheet condition
Published value
-60 V
Published datasheet condition
11
11.1949 A
Published datasheet condition
Vo3
800 V
Published datasheet condition
Published value
40 V
Published datasheet condition
Published value
5 A
Published datasheet condition
Published value
6 A
Published datasheet condition

Other

Vg3
1000 V
Published datasheet condition
Vg3 = max. 1000 V VD1D1'p
450 V
Published datasheet condition
Vg3 = min.,
800 V
Published datasheet condition
Vg3 = min., 800 V Vp2p2'p
750 V
Published datasheet condition
Vg2
400 V
Published datasheet condition
Vg2 = max. 400 V We
3 mW
Published datasheet condition
—Vg1
100 V
Published datasheet condition
—Vg1 = max. 100 V Rg1
0.5 MΩ
Published datasheet condition
Vg3 = max. 1000 V VD1D1'p = mex
450 V
Published datasheet condition
Ve3 = min,
800 V
Published datasheet condition
Ve3 = min, 800 V Vp2p2'p
750 V
Published datasheet condition
Vg1 = max. ov Rp
5 MΩ
Published datasheet condition
Vg1
1007 V
Published datasheet condition
Vg1 =max. 1007V Rg1
0.5 MΩ
Published datasheet condition