GU4A

High-power RF triode for oscillator and power-amplifier service. Approximately 2 kW plate dissipation and 6 kV capability provide substantial communications or industrial radio-frequency output from a directly heated transmitting structure.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 8.5 V / -

Description

RF oscillator and power-amplifier triode. Extracted from the English electrical and limit-operating tables of the bilingual datasheet.

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: 8.5 V
Nominal heater current: -
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

Max plate voltage: 6000 V
Max plate dissipation: 2000 W
Max grid dissipation: 800 W

English text primary; Russian used only to verify/repair OCR.

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

1968 Electronintorg

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Transconductance
20000 to 40000 uS
Amplification Factor
48 to 70

Capacitance

Input Capacitance
40 pF
max
Output Capacitance
1 pF
max
Transfer Capacitance
35 pF
max

Other

Minimum Output Power
13 kW
Va=6kV
Filament Starting Current
218 A
Operating Frequency
100 MHz