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Voltage Pentode or Tetrode (under 100V) ·Pentode

5797

Remote- or semi-remote-cutoff pentode designed for RF, IF, variable-mu, or controlled-gain amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
K8-1
Socket code
B8D
Base pins
8
Nominal heater
26.5 V / 45 mA

Description

The 5797 is a subminiature semi-remote-cutoff pentode for radio-frequency amplification to about 400 MHz, designed for shock, vibration, and high-temperature aircraft service.

Socket description

Subminiature 8-lead

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
K8-1
Socket code
B8D
Base pins
8
Nominal heater voltage
26.5 V
Nominal heater current
45 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

K8-1 - 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

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
70000 Ω
Transconductance
0.00345 S
Max plate voltage
50 V
Max screen voltage
50 V
Max plate dissipation
0.8 W
Max screen dissipation
0.25 W
Max cathode current
9 mA
Rectifier max heater-cathode voltage
90 V

Design-center ratings and 26.5-V Class-A characteristics promoted.

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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

  • Input capacitance

    4.2 pF

  • Output capacitance

    3.2 pF

  • Grid-to-plate capacitance

    0.024 pF

Other

  • Plate voltage

    26.5 V

    ClassA

  • Screen-grid voltage

    26.5 V

    ClassA

  • Grid voltage

    0 V

    ClassA

  • Plate current

    2.8 mA

    ClassA

  • Screen-grid current

    0.9 mA

    ClassA

Characteristic

  • Plate resistance

    70000 ohm

  • Transconductance

    3450 uS

Data set 02

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate Voltage

    26.5 V

    ClassA

  • Screen Voltage

    26.5 V

    ClassA

Characteristic

  • Plate Current

    2.75 mA

    ClassA

  • Screen Current

    0.9 mA

    ClassA