Data set 01
1971 English Electric Valve
Published operating points and test conditions from this source.
Cathode Ray
Other
recurrent waveforims 1o half tone pictures
1
recurrent waveforims 1o half tone pictures. The writing gun beam is magneti-
Heater voltage
6.3 v
Heater voltage 6.3 6.3 v
Heater current
600 mA
Heater current 0.8 0.6 A
cathode 1o all other electrodes
4
cathode 1o all other electrodes 4.0 - oF
grid 1 to all other electrodes
70 pF
grid 1 to all other electrodes - 70 - pF
Writing gun grid 1 to writing gun Lamude*
1.5 pF
Writing gun grid 1 to writing gun Lamude* 1.5 - pF
Heater voltage
6.6 v
Heater voltage 6.0 6.6 v
Grid 3 voltage (negative value)
2000 v
Grid 3 voltage (negative value) 2000 v
Grid 2 voltage
2
Grid 2 voltage . 200 2
Grid 1 voltage
1
Grid 1 voltage
Heater voltage
6.6
Heater voltage 6.6
Viewing screen voltage
12
Viewing screen voltage . 12
Grid 4 {collector mesh} voltage
300
Grid 4 {collector mesh} voltage 300
Grid 3A voltage
300
Grid 3A voltage 300
Grid 3 voltage
300
Grid 3 voltage 300
Grid 1 voltage
150
Grid 1 voltage 150
heater positive with respect to cathode
125
heater positive with respect to cathode 125
heater negative with respect to cathode
125
heater negative with respect to cathode 125
Cathode current
10
Cathode current . 10
Viewing screen dissipation
6
Viewing screen dissipation 6.0
Grid 3 voltage {usual range fcrfocusi*
700
Grid 3 voltage {usual range fcrfocusi* 400 to 700
Grid 2 voltage
0
Grid 2 voltage 0
Grid 1 voltage (range for wnllng beamCUt-off)
-55
Grid 1 voltage (range for wnllng beamCUt-off) —30 10 —55
Cathode voltage
-1800
Cathode voltage —1800
Writing beamn current {50V modulation)
50
Writing beamn current {50V modulation)
Cathode current (50V moduldmon)
50
Cathode current (50V moduldmon)
Screen voltage
10
Screen voltage 10
Grid 4 fcollector mesh) voltage
225
Grid 4 fcollector mesh) voltage 225
Grid 3A voltage
150
Grid 3A voltage 150
Grid 1 vottage
30
Grid 1 vottage 30
Screen current for full brightness
0.4 mA
Screen current for full brightness 0.4 mA
Cathode current
375 mA
Cathode current . 375 mA
Grid 4 twriting gun) is intarnally connected to grid 2 {flood qun)
2
Grid 4 twriting gun) is intarnally connected to grid 2 {flood qun)
The viewing screen supsly impedance should be less than M2 to pre-
2
The viewing screen supsly impedance should be less than M2 to pre-
vent excessive changes i1 screen voltage during erasure
1
vent excessive changes i1 screen voltage during erasure.
With manual erasure {approximately 1 second) and the screen voltage
1
With manual erasure {approximately 1 second) and the screen voltage
flood gun grids 2, 3, 3A and 4 should be preset to the Tixed values given
4
flood gun grids 2, 3, 3A and 4 should be preset to the Tixed values given
maximum uniform disolay over the screen. The voltage of grid 3
3
maximum uniform disolay over the screen. The voltage of grid 3
of grid 1 and grid 3A voltages may assist in obtaining the most uniform
3
of grid 1 and grid 3A voltages may assist in obtaining the most uniform
charging and can occur when a pulse exceeding 20 volts in amplitude
20 a
charging and can occur when a pulse exceeding 20 volts in amplitude
electrode from its supply and connecting it to the flood gun grid 4 through
4
electrode from its supply and connecting it to the flood gun grid 4 through
The writing gun cathode is operated at a polential in the region of —1.5 to
-1.5 a
The writing gun cathode is operated at a polential in the region of —1.5 to
—2.3kV; consequently the heater supply should be adequately insulated. The
-2.3
—2.3kV; consequently the heater supply should be adequately insulated. The
cathode supply must be free from ripple 10 prevent modulation of the writing
10
cathode supply must be free from ripple 10 prevent modulation of the writing
Green
1
Green Grid 1 Brown Heater
Brown
1
Brown Heater Green Grid 1
White
3
White Grid 3
Grey
2
Grey Grid 2
1 Grid 3 {flood gun)
3
1 Grid 3 {flood gun)
3 Grid 3A {flood gun)
3
3 Grid 3A {flood gun)
4 Grid 4 {floed qun}
4
4 Grid 4 {floed qun}
5 Grid 2 (flood gun)
2
5 Grid 2 (flood gun)