Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Power - Triode ·Triode

GI39

Russian RF/pulse power triode; maximum anode voltage 20000 V.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
12.6 V / 3.7 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
12.6 V
Nominal heater current
3.7 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 0

Triode

X-ray radiationInterelectrode capacitances
Max plate voltage
20000 V

440 W CW / 128 kW pulse; gm 0.027–0.036 A/V; filament 3.4–3.9 A; max wavelength 25 cm (about 1200 MHz).

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

    12.6 V

    Nominal heater/filament voltage

  • Heater/filament current

    3.7 A

    Nominal heater/filament current

  • Maximum plate voltage

    20000 V

    Maximum anode voltage; continuous rating unless pulse qualification specified