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Power - Triode (over 1000V 100W) ·Triode

750TL

Low-mu transmitting power triode for RF amplifier, oscillator, and audio modulator service. Hundreds of watts of plate dissipation and multi-kilovolt operation support substantial professional transmitting and modulation power.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
SPECIAL4
Base pins
-
Nominal heater
7.5 V / 21 A

Description

750TL is listed in the supplied Amperex material as a medium-mu transmitting power triode. Published ratings and operating data were captured from the supplied table.

Socket description

Special 4-contact transmitting-tube base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
SPECIAL4
Base pins
-
Nominal heater voltage
7.5 V
Nominal heater current
21 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
Amplification factor
15
Max plate voltage
10000 V
Max plate dissipation
750 W
Max grid dissipation
100 W
Max cathode current
1 A

Promoted fields populated from published ratings/characteristics; additional published values retained in TUBE_SECTION_PARAMETER.

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

1958 Amperex Industrial

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Maximum plate voltage

    6000 V

    Published Amperex table

  • Power output

    3000 W

    Published Amperex table

  • Plate dissipation

    750 W

    Published Amperex table

  • Plate current

    625 mA

    Published Amperex table

  • Grid bias

    700 V

    Published Amperex table

  • Grid current

    105 mA

    Published Amperex table

  • Maximum frequency

    40 MHz

    Published Amperex table

Characteristic

  • Amplification factor

    15

    Published Amperex table

  • Heater/filament voltage

    7.5 V

    Published Amperex table

  • Heater/filament current

    21 A

    Published Amperex table

Data set 02

1962 Eimac

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Grid-Plate Capacitance

    5.8 pF

  • Grid-Filament Capacitance

    8.5 pF

  • Plate-Filament Capacitance

    1.2 pF

Other

  • Frequency for Maximum Ratings

    40 MHz

  • Maximum DC Plate Current

    1 A

    ClassC

  • Typical Class C Plate Voltage

    6000 V

    ClassC

  • Typical Class C Plate Output Power

    3000 W

    ClassC

  • Plate-Modulated Maximum Plate Voltage

    8000 V

    ClassC;Telephony

  • Plate-Modulated Maximum Plate Dissipation

    500 W

    ClassC;Telephony

Data set 03

1965 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Amplification Factor

    16.5

  • DC Plate Current Maximum

    1 A

  • Grid Dissipation Maximum

    100 W

  • Frequency Maximum

    40 MHz

  • Typical Class-C Output Power

    3000 W

  • Two-Tube Class-AB2 Output Power

    3500 W