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DR74

Oscillographic cathode-ray tube with electrostatic focusing and double electrostatic deflection, using a greenish-yellow long-persistence screen for retained waveform presentation.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: B12A
Base pins: -
Nominal heater: 6.3 V / 400 mA

Description

Oscillography cathode-ray tube with electrostatic focusing and double electrostatic deflection; greenish-yellow/long-persistence family variant.

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: 400 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: 800 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

1957 Philips Receiving and Amplifying Tubes

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

Maximum Plate Voltage
800 V
Anode 2 Voltage
800 V
Anode 1 Voltage Minimum
200 V
Anode 1 Voltage Maximum
300 V

Characteristic

Focusing Method
Electrostatic
Deflection Method
Double electrostatic
Screen Variant
greenish-yellow/long-persistence family variant

Data set 02

1963 Philips Electron Tubes Handbook V2

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

Heater voltage
6.3 V
Published heater rating
Heater current
400 mA
Published heater rating
Deflection
Double electrostatic
OscilloscopeCRT
D1 deflection
Symmetrical
OscilloscopeCRT
D2 deflection
Asymmetrical
OscilloscopeCRT

Other

D2-prime connection
Connected to second accelerator
OscilloscopeCRT

Data set 03

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

Chauffages; indirect par C.A. ou C.C. Vf
6.3 V
Published datasheet condition
Heizung: indirekt durch Wechsel- If
400 mA
Published datasheet condition
D2' est & connecter
3 a
Published datasheet condition
Capacitances Cg
9 pF
Published datasheet condition
Kapazitdten o
4.4 PF
Published datasheet condition
cD2
5 pF
Published datasheet condition
cD1D1!
0.5 pF
Published datasheet condition
cD2Dp2!
0.8 pF
Published datasheet condition
CD1D1' - D2Dp2'
0.1 pF
Published datasheet condition
Epaisseur de la ligne Eg%Q - gog X%
0.7 mm
Published datasheet condition
Va2
800 v
Published datasheet condition
Va1l = 200
300 V
Published datasheet condition
Vg 0
50 V
Published datasheet condition
N1
0.26 mm
Published datasheet condition
N2
0.16 mm
Published datasheet condition
Grenzdaten Vaz = Dax
1000 V
Published datasheet condition
1) Measured on a circle of
50 mm
Published datasheet condition
Mesuré 3 un cercle de
50 mm
Published datasheet condition
Gemessen an einem Kreis von
50 mm
Published datasheet condition
Published value
-40 V
Published datasheet condition
10
10.1949 A
Published datasheet condition
Published value
3 A
Published datasheet condition

Other

Published value
800 v
Published datasheet condition
Vai = maxX
400 v
Published datasheet condition
Vg = max. o
0 v
Published datasheet condition
Vg
100 v
Published datasheet condition
VYD1D1?
450 v
Published datasheet condition
VD2D2*
750 v
Published datasheet condition