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Tube Tinker — Electron Tube Database
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Power - Triode ·Triode

GI56A

Russian RF/pulse power triode; maximum anode voltage 40000 V.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
34 V / 1150 A

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
34 V
Nominal heater current
1150 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 0

Triode

X-ray radiationInterelectrode capacitances
Max plate voltage
40000 V

100 kW CW / 25 MW pulse; gm source 100mA/B (unverified unit); filament 1050–1250 A; 30 MHz max.

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

2026 Russian Power

Published operating points and test conditions from this source.

SECTION 0

Triode

Other

  • Heater/filament voltage

    34 V

    Nominal heater voltage

  • Heater/filament current

    1150 A

    Nominal heater current

  • Maximum plate voltage

    40000 V

    Maximum anode voltage

Characteristic

  • Center/operating frequency

    30 MHz

    Maximum operating frequency stated by manufacturer; not a typical center frequency