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Power - Beam (NOT sweep) ·BeamPower

GMI90

Russian beam-power tetrode intended for high-voltage pulse-modulator operation.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
25 V / 7.2 A

Description

The GMI90 is a beam-power tetrode intended for high-voltage pulse-modulator operation.

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
25 V
Nominal heater current
7.2 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
Max plate voltage
33000 V
Max screen voltage
1750 V
Max cathode current
40 A

High-voltage pulse ratings promoted from English data.

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

Beam Power

Characteristic

  • Peak anode current minimum

    40 A

    AnodeVoltage=33kV;Bias=-0.6kV;Grid2=1.75kV

  • Cutoff voltage maximum

    550 V

Capacitance

  • Input capacitance maximum

    150 pF

  • Output capacitance maximum

    35 pF

  • Transfer capacitance maximum

    10 pF

Other

  • Peak grid 1 excess voltage

    300 V

  • Pulse duration maximum

    3 us

  • Warm-up time minimum

    300 s