GU94A

High-power metal-ceramic tetrode designed primarily for stationary pulse-modulation RF equipment through approximately 30 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 18 V / 600 A

Description

The GU-94A is a directly heated metal-ceramic tetrode designed for stationary pulse-modulation RF equipment, providing very high output power at frequencies through 30 MHz.

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: 18 V
Nominal heater current: 600 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

Max plate voltage: 15000 V
Max screen voltage: 1800 V
Max plate dissipation: 160000 W
Max screen dissipation: 2500 W
Max grid dissipation: 500 W

English text used as primary source; Russian text used only to repair/check ambiguous 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

Tetrode

Other

Operating Frequency
30 MHz
Maximum Anode Voltage
15000 V
Maximum Anode Dissipation
160000 W
Maximum Grid Dissipation
500 W
Maximum Grid 2 Voltage
1800 V
Maximum Grid 2 Dissipation
2500 W
Anode Voltage in Anode-Screen Modulation
12500 V
Grid 2 Voltage in Anode-Screen Modulation
900 V
Negative Bias Voltage
600 V
Filament Starting Current Peak
800 A
Output Power
150 kW
Pulse modulation; up to 2 MHz
Output Power
100 kW
Pulse modulation; up to 30 MHz

Characteristic

Filament/Heater Voltage
18 V
Peak Anode Current
190 A
Mutual Conductance
110000 to 180000 uS