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Diode (NOT rectifier) ·Diode

T4D

Indirectly heated television diode intended for low-current signal detection or rectifier applications.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
4 V / 200 mA

Description

The Mullard T4D is an indirectly heated television diode for low-current signal or rectifier applications.

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
4 V
Nominal heater current
200 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

Diode

X-ray radiationInterelectrode capacitances
Rectifier peak inverse voltage
50 V

Television diode 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

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristics

  • Heater Voltage

    4 V

  • Heater Current

    200 mA

  • Diode-Cathode Capacitance

    2.1 pF

Other

  • Maximum Diode Voltage

    50 V

  • Maximum Diode Current

    5 mA

  • Maximum Heater-Cathode Voltage

    50 V

  • Maximum Heater-Cathode Resistance

    20000 ohm