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Specialized - Cathode Ray ·CathodeRay

TMA408

Dual-function electronic storage or scan-converter tube with separate writing and reading processes. Charge patterns are stored on an internal target and subsequently read in the same or a converted scanning format.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 600 mA

Description

The TMA408 is a dual-gun scan-converter storage tube for electrical signal storage, simultaneous writing/reading, adjustable storage time, and fast erasure.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
600 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

No fixed ratings are recorded for this section.

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

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current per Gun

    600 mA

  • Output Capacitance

    15 pF

  • Resolution

    150 PPI range rings

  • Storage Time

    0.5-20 s

  • Fast Erasing Time

    2 s

  • Writing Cathode Voltage

    -7000 V

  • Reading Cathode Voltage

    -1560 V