6775

Radial-beam transmitting tetrode, also designated 4-400C, designed for broadcast-quality RF power service with approximately 400 W plate dissipation and kilovolt operation.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: 5
Nominal heater: 5 V / 14.7 A

Description

6775/4-400C radial-beam broadcast-quality power tetrode; radiation and forced-air cooled.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: 5
Nominal heater voltage: 5 V
Nominal heater current: 14.7 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

Beam Power

X-ray radiationInterelectrode capacitances

Transconductance: 0.004 S
Amplification factor: 5.1
Max plate voltage: 4000 V
Max screen voltage: 800 V
Max plate dissipation: 400 W
Max screen dissipation: 35 W
Max grid dissipation: 10 W

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

1962 Eimac

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Capacitance

Input Capacitance
12.5 pF
Output Capacitance
4.7 pF
Feedback Capacitance
0.12 pF

Other

Frequency of Maximum Rating
110 MHz
Maximum DC Plate Current
350 mA
ClassAB/ClassC
Typical Linear Plate Voltage
3000 V
ClassAB1
Typical Linear Useful Output Power
470 W
ClassAB1
Typical Class C Plate Output Power
1100 W
ClassC