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Specialized - Cathode Ray ·CathodeRay

TH8804

Thomson-CSF storage tube designed for electronic recording, retention, and readout of electrical information. Family variants emphasize transient capture, high-resolution storage, scan conversion, rugged miniature operation, or bright direct viewing.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
DITETRAR8
Base pins
-
Nominal heater
-

Description

The TH8804 is a scan-converter storage tube for temporary storage and conversion of electrical signals using a writing beam and readout process.

Socket description

Small-button Ditetrar 8-pin

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
DITETRAR8
Base pins
-
Nominal heater voltage
-
Nominal heater current
-
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 ratings/characteristics audited; detailed numeric data retained in parameter table.

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

1972 Thomson CSF

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Output signal current . ... .............. R [1]

    500 mA

    Output signal current . ... .............. R 0.5t02 uA

  • Output signal current . ... .............. R [2]

    2 A

    Output signal current . ... .............. R 0.5t02 uA

  • OUTPUL CAPACITANCE .+ o o v v et e e e e e e e e ettt et e e e e e et e e

    8 pF

    OUTPUL CAPACITANCE .+ o o v v et e e e e e e e e ettt et e e e e e et e e 8 pF

  • ResolUtion . . ... i e e e e [1]

    250

    ResolUtion . . ... i e e e e 250 P.P.1. range rings at 50 % modulation

  • ResolUtion . . ... i e e e e [2]

    1

    ResolUtion . . ... i e e e e 250 P.P.1. range rings at 50 % modulation

  • ResolUtion . . ... i e e e e [3]

    50

    ResolUtion . . ... i e e e e 250 P.P.1. range rings at 50 % modulation

  • Heater voltage (Note [1]

    1 V

    Heater voltage (Note 1) . .. .. . . i i e et e e 6.11t06.5 Vv

  • Heater voltage (Note [2]

    6.11 V

    Heater voltage (Note 1) . .. .. . . i i e et e e 6.11t06.5 Vv

  • Heater voltage (Note [3]

    6.5 V

    Heater voltage (Note 1) . .. .. . . i i e et e e 6.11t06.5 Vv

  • Cathode k' voltage .. ... .. .. ... @itttittt e e e

    -8 V

    Cathode k' voltage .. ... .. .. ... @itttittt e e e -8 kV

  • Voltage between heater and cathode . .......... [P +

    150 V

    Voltage between heater and cathode . .......... [P + 150 \

  • Control grid g' [1]

    1 V

    Control grid g'1 voltage (w.r.t.cathode) . ............... ... —180 to O \Y

  • Control grid g' [2]

    -180 V

    Control grid g'1 voltage (w.r.t.cathode) . ............... ... —180 to O \Y

  • Anode g'

    2 V

    Anode g'2voltage .. ... e e e connected to target

  • Focusingg’' [1]

    3 V

    Focusingg’'3voltage .. ... ... ...t -7 1t0 0 kV

  • Focusingg’' [2]

    -7 V

    Focusingg’'3voltage .. ... ... ...t -7 1t0 0 kV

  • Focusingg’' [3]

    1 V

    Focusingg’'3voltage .. ... ... ...t -7 1t0 0 kV

  • Focusingg’' [4]

    0 V

    Focusingg’'3voltage .. ... ... ...t -7 1t0 0 kV

  • Heater voltage (NOte [1]

    2 V

    Heater voltage (NOte 2) . .. . .. . it i e et e e 6.11t06.5 v

  • Heater voltage (NOte [2]

    6.11 V

    Heater voltage (NOte 2) . .. . .. . it i e et e e 6.11t06.5 v

  • Heater voltage (NOte [3]

    6.5 V

    Heater voltage (NOte 2) . .. . .. . it i e et e e 6.11t06.5 v

  • Cathode kvoltage ... .. ... . . . ...t ee e

    -1.5 V

    Cathode kvoltage ... .. ... . . . ...t ee e -1.5 kV

  • Voltage between heater andcathode . ... ....... ... ... ... ... ... .... *

    150 V

    Voltage between heater andcathode . ... ....... ... ... ... ... ... .... * 150 \

  • Control grid g1 voltage {w.r.t.cathode) [1]

    -180 V

    Control grid g1 voltage {w.r.t.cathode) ... ..... ... .. ... .. ... ... ...... —180 10 O \Y;

  • Control grid g1 voltage {w.r.t.cathode) [2]

    10 V

    Control grid g1 voltage {w.r.t.cathode) ... ..... ... .. ... .. ... ... ...... —180 10 O \Y;

  • Anode g2 vOItage . . . .. i e e e

    -100

    Anode g2 vOItage . . . .. i e e e —100 to O \

  • Erasingg3voltage . ........... ... ... ... ... ... e e e [1]

    -1.5 V

    Erasingg3voltage . ........... ... ... ... ... ... e e e —1.5t 0 kV

  • Erasingg3voltage . ........... ... ... ... ... ... e e e [2]

    0 V

    Erasingg3voltage . ........... ... ... ... ... ... e e e —1.5t 0 kV

  • Heater voItage . . . . o vttt i e e e

    6.3

    Heater voItage . . . . o vttt i e e e 6.3 \Y

  • Heater CUrrent, aPProX. . . . vt ittt s e e e e e e e e

    300 mA

    Heater CUrrent, aPProX. . . . vt ittt s e e e e e e e e 0.3 A

  • Cathode k' voltage .. ... ... .. ...ttt e e

    -7 V

    Cathode k' voltage .. ... ... .. ...ttt e e -7 kV

  • Voltage between heater and cathode

    0 V

    Voltage between heater and cathode . .. ...... ... ... ... . ... . ... ... 0 \Y)

  • Control grid g' [1]

    1 V

    Control grid g'1 voltage for cut-off (w.r.t. cathode) ... ................... —90to—30 \Y

  • Control grid g' [2]

    -90 V

    Control grid g'1 voltage for cut-off (w.r.t. cathode) ... ................... —90to—30 \Y

  • Control grid g' [3]

    30 V

    Control grid g'1 voltage for cut-off (w.r.t. cathode) ... ................... —90to—30 \Y

  • Focusingg' [1]

    3 V

    Focusingg'3voltage ... .. ... ... . e -5 7t0—-56.3 kV

  • Focusingg' [2]

    -5 V

    Focusingg'3voltage ... .. ... ... . e -5 7t0—-56.3 kV

  • Focusingg' [3]

    7 V

    Focusingg'3voltage ... .. ... ... . e -5 7t0—-56.3 kV

  • Focusingg' [4]

    -56.3 V

    Focusingg'3voltage ... .. ... ... . e -5 7t0—-56.3 kV

  • Heater voltage . ... .. i it e e e

    6.3 V

    Heater voltage . ... .. i it e e e 6.3 A

  • Heater current, @pPrOX. . o v it ittt e e e e e e e e e e e e e e

    300 mA

    Heater current, @pPrOX. . o v it ittt e e e e e e e e e e e e e e 0.3 A

  • Cathodek voltage . ... ... .. ... . . . .. i e e i e

    -1.2 V

    Cathodek voltage . ... ... .. ... . . . .. i e e i e -1.2 kV

  • Voltage between heater andcathode

    0 V

    Voltage between heater andcathode . . ... ... ... ... ... .. .. ... 0 \'

  • Control grid g1 voltage for cut-off (w.r.t. cathode) [1]

    -90 V

    Control grid g1 voltage for cut-off (w.r.t. cathode) . ..................... —90to—30 \

  • Control grid g1 voltage for cut-off (w.r.t. cathode) [2]

    30 V

    Control grid g1 voltage for cut-off (w.r.t. cathode) . ..................... —90to—30 \

  • Anode g2 voltage . . ... e e e e [1]

    -40 V

    Anode g2 voltage . . ... e e e e —40to 0 \'

  • Anode g2 voltage . . ... e e e e [2]

    0 V

    Anode g2 voltage . . ... e e e e —40to 0 \'

  • Focusing gd voltage . . . ... .. . ... e [1]

    -1.2 V

    Focusing gd voltage . . . ... .. . ... e —1.2to — 1.0 kV

  • Focusing gd voltage . . . ... .. . ... e [2]

    1 V

    Focusing gd voltage . . . ... .. . ... e —1.2to — 1.0 kV

  • Collectorvoltage . . ... oottt e e e e e [1]

    0 V

    Collectorvoltage . . ... oottt e e e e e 0 to 40 A

  • Collectorvoltage . . ... oottt e e e e e [2]

    40 V

    Collectorvoltage . . ... oottt e e e e e 0 to 40 A

  • Shading corrector voltage (w.r.t. collector voltage) [1]

    0 V

    Shading corrector voltage (w.r.t. collector voltage) ... ................... 0 to 20 \Y

  • Shading corrector voltage (w.r.t. collector voltage) [2]

    20 V

    Shading corrector voltage (w.r.t. collector voltage) ... ................... 0 to 20 \Y

  • Published value [1]

    1

    1 Heater insulated for 8 kV w.r.t. ground.

  • Published value [2]

    8

    1 Heater insulated for 8 kV w.r.t. ground.

  • Published value [1]

    2

    2 - Heater insulated for 2 kV w.r.t: ground.

  • Published value [2]

    2

    2 - Heater insulated for 2 kV w.r.t: ground.

  • Published value

    3

    3 - Provide a suitable shield in order to protect the tube from stray electric and magnetic fields.

  • The secondaries collected by the output electrode (

    4

    The secondaries collected by the output electrode (4) give rise to a video signal progressively decreasing.

  • Typigall decay curves given in Fig

    2 V

    Typigall decay curves given in Fig. 2 are obtained by changing both collector voltage and/or reading current.

  • Published value [1]

    100 V

    100 Target voltage 0 ————.4]~J—_—.

  • Published value [2]

    0 V

    100 Target voltage 0 ————.4]~J—_—.

  • Published value [3]

    4 V

    100 Target voltage 0 ————.4]~J—_—.

  • RELATIVE SIGNAL OUTPUT {

    7

    RELATIVE SIGNAL OUTPUT {7)

  • grid g3 voltage

    0 V

    grid g3 voltage 0 ] |