4500A

Eimac 4-500A broadcast-quality power tetrode designed for amplifier, oscillator, or modulator service. Rugged construction emphasizes long life and consistent performance in professional transmitting equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 10 V / 10.2 A

Description

The EIMAC 4-500A is a compact ruggedly constructed broadcast-quality tetrode for amplifier, oscillator, or modulator service and is especially recommended where long life and consistent performance are important.

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: 10 V
Nominal heater current: 10.2 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

Tetrode

X-ray radiationInterelectrode capacitances

Amplification factor: 5.5
Max plate voltage: 4000 V
Max screen voltage: 1000 V
Max plate dissipation: 500 W
Max screen dissipation: 35 W
Max grid dissipation: 12 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

Tetrode

Characteristic

Frequency for Maximum Ratings
110 MHz

Other

Maximum DC Plate Current
450 mA
Absolute maximum
Typical Plate Output Power
1265 W
Class-C, 3800 V plate

Capacitance

Input Capacitance
15 pF
Grounded filament
Output Capacitance
5 pF
Grounded filament
Feedback Capacitance
0.15 pF
Grounded filament