Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

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

304TL

Low-mu transmitting power triode for amplifier, oscillator, and modulator service at relatively low plate voltage.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
SPECIAL4
Base pins
-
Nominal heater
10 V / 12.5 A

Description

The EIMAC 304TL is a low-mu transmitting power triode for amplifier, oscillator, and modulator service at low plate voltage.

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
10 V
Nominal heater current
12.5 A
Parallel heater voltage
5 V
Parallel heater current
25 A
Series capable
Yes

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
Transconductance
0.0167 S
Amplification factor
12
Max plate voltage
3000 V
Max plate dissipation
300 W
Max grid dissipation
50 W

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

1962 Eimac

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Frequency for Maximum Ratings

    40 MHz

Other

  • Maximum DC Plate Current

    900 mA

Capacitance

  • Grid-Plate Capacitance

    8.6 pF

  • Grid-Filament Capacitance

    12.1 pF

  • Plate-Filament Capacitance

    0.8 pF