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Power - Triode ·Triode

4304B

Directly heated power triode documented by Standard Valves and Standard Telephone and Cables. The available source record establishes the device and operating data but does not support a sufficiently specific functional application to justify specialized tagging.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B4
Base pins
4
Nominal heater
7.5 V / 3.25 A

Description

The 4304B is a triode described in the Standard Valves datasheet, using a directly heated filament cathode and published operating data.

Socket description

European 4-pin base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B4
Base pins
4
Nominal heater voltage
7.5 V
Nominal heater current
3.25 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
5500 Ω
Transconductance
0.002 S
Amplification factor
11
Max plate voltage
1250 V
Max plate dissipation
50 W
Max cathode current
100 mA

Ratings and characteristics extracted from 4304B.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

  • Total emission

    1 A

    Published datasheet value

  • Grid-anode capacitance

    25 pF

    Published datasheet value

  • Anode-filament capacitance

    7 pF

    Published datasheet value

  • Grid-filament capacitance

    20 pF

    Published datasheet value

Other

  • Maximum frequency for above ratings

    100 MHz

    Published datasheet value

Data set 02

1946 Standard Telephone and Cables

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Filament voltage

    7.5 volts

  • Nominal filament curren

    3.25 amps

  • Impedance

    5500 ohms

  • Maximum direct anode voltage

    1250 volts

  • Maximum direct anode curren

    0.1 amps

  • Maximum anode dissipation

    50 watts

  • Maximum direct grid curren

    0.025 amps

  • Maximum frequency for above ratings

    100 Mc

  • Maximum anode voltage for frequency o

    300 Mc

  • Direct anode voltage 1,250 1,000 1,000 750 1,250

    1000 volts

  • Carrier output 25 20 65 50 85

    65 watts

  • Anode dissipation 50 40 35 25 40

    35 watts

  • Class B Amplifier 1,250 1,125 1,000 875

    750 volts

  • Amplifier—unmodulated 1,250 1,125 1,000 875

    750 volts

  • modulated 1,000 900 800 700

    600 volts

  • Anode voltage 1,250 1,000

    750 volts

  • Power output 60 35

    13 watts

  • Limit of oscillation, approximately

    400 Mc