3500Z

Eimac 3-500Z compact high-mu power triode for zero-bias Class AB2 audio and RF linear amplification as well as RF power service. Its roughly 500 W plate dissipation and high amplification factor suit high-power linear amplifier stages.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: SPECIAL5
Base pins: 5
Nominal heater: 5 V / 14.5 A

Description

The Eimac 3-500Z is a compact power triode intended for zero-bias class-AB2 audio- and radio-frequency linear-amplifier service and RF power applications.

Socket description

Special 5-pin transmitting-tube base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: SPECIAL5
Base pins: 5
Nominal heater voltage: 5 V
Nominal heater current: 14.5 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: 160
Max plate voltage: 4000 V
Max plate dissipation: 500 W
Max grid dissipation: 20 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

Other

Maximum DC Plate Current
400 mA
Class-B
Maximum-Signal Plate Output Power
1420 W
ClassB; TwoTubes; 3000V Plate
Plate Output Power
850 W
ClassC; 3500V Plate

Characteristic

Frequency for Maximum Ratings
110 MHz

Capacitance

Grid-Filament Capacitance
7.4 pF
Grid-Plate Capacitance
4.1 pF
Plate-Filament Capacitance
0.07 pF