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Power - Tetrode (NOT beam) (over 1000V 100W) ·Tetrode

GU91B

Transmitting power tetrode designed for RF amplification, linear/SSB service, oscillation, modulation, broadcasting, or frequency multiplication.

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

Description

The GU-91B is a metal-ceramic tetrode used for RF power amplification, with forced-air cooling and operation to 250 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
12.6 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

Tetrode

X-ray radiationInterelectrode capacitances
Max plate voltage
2000 V
Max screen voltage
350 V
Max plate dissipation
1600 W
Max screen dissipation
20 W
Max grid dissipation
0.1 W
Max cathode current
1.4 A

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

    250 MHz

  • Maximum Anode Voltage

    2000 V

  • Maximum Anode Dissipation

    1600 W

  • Maximum Grid Dissipation

    0.1 W

  • Maximum Grid 2 Voltage

    350 V

  • Maximum Grid 2 Dissipation

    20 W

  • Peak/Instantaneous Anode Voltage

    3750 V

  • Cathode Current Instantaneous

    4.5 A

  • Cathode-Heater Voltage

    100 V

Characteristic

  • Filament/Heater Voltage

    12.6 V

  • Mutual Conductance

    30000 to 65000 uS

  • Minimum Cathode Heating Time

    180 s

  • Minimum Warm-up Time

    300 s