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Voltage - Triode (single) ·Triode

4300A

Directly heated or receiving triode documented by the manufacturer; available source material does not establish a narrower functional category strongly enough for reassignment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
MEDIUM4BAYONET
Base pins
4
Nominal heater
5 V / 1.2 A

Description

The 4300A is a triode described in the Standard Valves datasheet, using a directly heated filament cathode and published operating data.

Socket description

Medium 4-contact bayonet base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
MEDIUM4BAYONET
Base pins
4
Nominal heater voltage
5 V
Nominal heater current
1.2 A
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

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
720 Ω
Transconductance
0.0054 S
Amplification factor
3.9
Max plate voltage
450 V
Max plate dissipation
40 W
Max cathode current
70 mA

Ratings and characteristics extracted from 4300A.pdf.

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

1937 Standard Valves

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Grid-anode capacitance

    15 pF

    Published datasheet value

  • Anode-filament capacitance

    4.3 pF

    Published datasheet value

  • Grid-filament capacitance

    9 pF

    Published datasheet value

Data set 02

1946 Standard Telephone and Cables

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Filament voltage

    5 volts

  • Nominal filament curren

    1.2 amps

  • Impedance

    720 ohms

  • Mutual conductance

    54 mA

Other

  • at Vp —

    300 volts

  • Maximum anode voltage

    450 volts

  • Maximum anode dissipation

    40 watts

  • self-biasing circui

    100 mA