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TH9840

Pyricon infrared thermal-imaging pickup tube using a pyroelectric target for thermal television applications.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: DITETRAR8
Base pins: 8
Nominal heater: 6.3 V / 150 mA

Description

1-inch Pyricon infrared pickup tube for thermal television, using a pyroelectric target and electromagnetic focus/deflection.

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: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 150 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

CameraPickup

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Camera/pickup-tube section. Camera-specific target/grid/focusing/deflection limits are preserved in TUBE_SECTION_PARAMETER rather than forced into unrelated plate/screen promoted fields.

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

CameraPickup

Other

Electrode g4 Voltage Maximum
1000 V
Electrode g3 Voltage Maximum
1000 V
Electrode g2 Voltage Maximum
350 V
Grid g1 Negative Bias Maximum
-150 V
Grid g1 Positive Bias Maximum
0 V
Heater-Cathode Peak Voltage Negative
125 V
Heater-Cathode Peak Voltage Positive
10 V
Target Voltage Maximum
125 V
Dark Current Maximum
0.2 uA
Peak Target Current Maximum
0.6 uA
Minimum Preheating Time
60 s
Heater Voltage Maximum
7 V
Heater Voltage Minimum
6.3 V
Heater-Cathode Peak Voltage Negative
125 V
Heater-Cathode Peak Voltage Positive
10 V
Grid g1 Negative Bias Maximum
-125 V
Grid g2 Voltage Maximum
200 V
Grid g3 Voltage Maximum
400 V
Grid g4 Voltage Maximum
500 V
Target Voltage Minimum
0 V
Target Voltage Maximum
-10 V
Gas Reservoir Voltage Maximum
5 V
Gas Reservoir Current Maximum
500 mA
Minimum Preheating Time
5 min
Output Capacitance Maximum
6 pF
Infrared Spectral Band Minimum
8000 nm
Infrared Spectral Band Maximum
14000 nm
Minimum Resolvable Temperature Difference
0.5 C