8921

High-power transmitting tetrode designed for RF power amplification, linear amplification, oscillation, modulation, or frequency multiplication.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6 V / 5.4 A

Description

Larger-anode-cooler version of the 4CX600J electrical design.

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: 6 V
Nominal heater current: 5.4 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

Transconductance: 0.027 S
Max plate voltage: 3000 V
Max screen voltage: 450 V
Max plate dissipation: 600 W
Max screen dissipation: 16 W
Max grid dissipation: 1 W

Promoted values are taken from printed General Characteristics / Maximum Ratings. Additional published conditions and operating data are preserved in parameters.

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

Capacitance

Input Capacitance
50 pF
Output Capacitance
6.3 pF
Feedback Capacitance
0.13 pF

Other

Cathode-Heater Potential Maximum
150 V
Maximum DC Plate Current
600 mA
Typical Plate Voltage
2500 V
ClassAB
Typical Screen Voltage
350 V
ClassAB
Typical Useful Output Power
1100 W
ClassAB