Specialized - Cathode Ray ·CathodeRay
High-vacuum electrostatic oscilloscope CRT with an approximately 2.5-inch screen and long-persistence phosphor, designed for compact waveform measurement and retained trace display.
The Mullard DR76 is a high-vacuum electrostatic oscilloscope tube with an approximately 2.5-inch screen and long persistence phosphor.
Loctal 8-contact
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
1 physical section, each with unique specifications.
Section 1
Electrostatic focusing/deflection CRT section; electrical/screen/deflection data retained in parameter rows.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Screen Colour / Persistence
Long persistence
Focusing Method
Electrostatic
Deflecting Method
Double Electrostatic
Anode Voltage
800 V
Focusing Electrode Voltage Minimum
200 V
Focusing Electrode Voltage Maximum
300 V
Data set 02
Published operating points and test conditions from this source.
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
Focusing Method
Electrostatic
Deflection Method
Double electrostatic
Screen Variant
greenish-yellow, long persistence
Data set 03
Published operating points and test conditions from this source.
Heater voltage
4.3 V
CathodeRay
Heater current
310 mA
CathodeRay
Accelerator voltage
800 V
OscilloscopeCRT
Grid No.2 voltage minimum
200 V
OscilloscopeCRT
Grid No.2 voltage maximum
300 V
OscilloscopeCRT
Grid No.1 extinction voltage maximum
50 V
OscilloscopeCRT
Accelerator voltage maximum
1000 V
OscilloscopeCRT
D1 peak deflection voltage maximum
450 V
OscilloscopeCRT
D2 peak deflection voltage maximum
750 V
OscilloscopeCRT
Focusing
Electrostatic
CathodeRay
Deflection
Double electrostatic
CathodeRay
Screen color
Greenish-yellow
CathodeRay
Screen persistence
Long
CathodeRay
Deflection sensitivity D1
0.25 mm/V
OscilloscopeCRT
Deflection sensitivity D2
0.16 mm/V
OscilloscopeCRT
Line width
0.7 mm
BeamCurrent0.5uA
Data set 04
Published operating points and test conditions from this source.
Heating: indirect by A.C. or D.C. Ve
6.3 V
Published datasheet condition
Heizung: indirekt durch Wechsel- Ifr
400 mA
Published datasheet condition
Dep2! asymmetr. D2' 801l mit a
2 v
Published datasheet condition
DG 7
-6 v
Published datasheet condition
DN 7
-6 v
Published datasheet condition
Heating : indirect by A.C. or D.C. Ve
6.3 V
Published datasheet condition
Chauffage:; indirect par C.A. ou C.C, Ve = &
3 V
Published datasheet condition
Chauffage: indirect par C.A. ou C.C. Ve o= &
3 V
Published datasheet condition
Capacitances Cg
9 pF
Published datasheet condition
Kapazitéten o1
4.8 pF
Published datasheet condition
Cp1
4.8 pF
Published datasheet condition
Cp2
5 pF
Published datasheet condition
Cp2*
544 PF
Published datasheet condition
Cp1D1°
0.6 pF
Published datasheet condition
Cp2p2*
0.8 pF
Published datasheet condition
CD1D1'-D2p2*
0.1 pF
Published datasheet condition
Epaisseur de la ligne §¥a2 = gog VA{
0.7 ma
Published datasheet condition
Va2
800 V
Published datasheet condition
Va1t = 200
-300 V
Published datasheet condition
Vg = 0
50 V
Published datasheet condition
Ny
0.26 mm
Published datasheet condition
N2
0.16 mm
Published datasheet condition
1) NMeasured on a circle of
50 mm
Published datasheet condition
Measuré & un cercle de
50 mm
Published datasheet condition
Gemessen an einem Kreis von
50 mm
Published datasheet condition
Ca1
10 pF
Published datasheet condition
Ca1 = 10 pF CD2'
4.5 pF
Published datasheet condition
CD‘I
5.3 pF
Published datasheet condition
CD‘I = 5,3 pF cD1D1'
0.6 pF
Published datasheet condition
cD‘l'
5.3 pF
Published datasheet condition
cD‘l' = 5,3 pF CDZDZ'
18 pF
Published datasheet condition
Cpa = 415 9F Cpypyr_pepar= O»
1 PF
Published datasheet condition
Vg3
800 V
Published datasheet condition
Vg2 = 200
-300 V
Published datasheet condition
N4
0.25 mm
Published datasheet condition
N»
0.16 mm
Published datasheet condition
1) Measured‘on a circle of
50 mm
Published datasheet condition
Mesuré & un cercle de
50 mm
Published datasheet condition
Cg1
10 pF
Published datasheet condition
Cg1 = 10 pF CD2l
4.5 pF
Published datasheet condition
Cp
5.3 pF
Published datasheet condition
Cp = 5,3 pF CD1D1'
0.6 pF
Published datasheet condition
CD1'
5.3 pF
Published datasheet condition
CD1' = 5,3 pF CD2D2‘
0.8 pF
Published datasheet condition
Epaisseur de la ligne E¥g3 - gog vAg
0.7 mm
Published datasheet condition
Vgo = 200
-300 V
Published datasheet condition
Vg1 = 0
-50 V
Published datasheet condition
X1
0.25 mm
Published datasheet condition
Np
0.16 mm
Published datasheet condition
3 6800
1 V
Published datasheet condition
Published value
750 V
Published datasheet condition
1) leasured on a circle of
50 mm
Published datasheet condition
Mesuré 4 un cercle de
50 mm
Published datasheet condition
Grenzdaten Yoz _
1000 V
Published datasheet condition
Published value
800 V
Published datasheet condition
Va1
400 V
Published datasheet condition
Vg
100 V
Published datasheet condition
"’D1D1'p
450 V
Published datasheet condition
vD2D2'p
750 V
Published datasheet condition
Wy
3 mW
Published datasheet condition
Vg3
1000 V
Published datasheet condition
Vg3 = max. 1000 V vD1D1'p = maxXe
450 V
Published datasheet condition
Vg3 = min. 800 V Vpoppr,,
750 V
Published datasheet condition
Vg2
400 V
Published datasheet condition
Vg2 = max. 400V We L
3 mw
Published datasheet condition
Vg1
100 V
Published datasheet condition
Vg1 = max. 100V Rg1
0.5 MΩ
Published datasheet condition
Vg3 = max. 1000 ¥ VD7D1 p
450 V
Published datasheet condition
Vg2 = max. 400V Vip
3 mW
Published datasheet condition
~Vg1
100 V
Published datasheet condition
~Vg1 = max. 100V Rg1
0.5 MΩ
Published datasheet condition