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Voltage Pentode or Tetrode (under 100V) ·Pentode

6612

Fully shielded directly heated subminiature pentode for higher-gain RF amplification in compact battery-powered high-frequency equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B5D
Base pins
5
Nominal heater
1.25 V / 80 mA

Description

Fully shielded directly heated subminiature pentode for higher-transconductance RF amplifier service.

Socket description

Subminiature wire-ended

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B5D
Base pins
5
Nominal heater voltage
1.25 V
Nominal heater current
80 mA
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

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
180000 Ω
Transconductance
0.003 S
Max plate voltage
50 V
Max plate dissipation
0.2 W
Max cathode current
5.5 mA

Published maximum ratings and typical characteristics promoted from the approved source; identical repeated sections compressed where applicable.

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

1938 Raytheon

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • HeaterVoltageNominal

    1.25 V

    Nominal

  • HeaterCurrentNominal

    80 mA

    Nominal

  • Maximum Plate Voltage

    50 V

  • Maximum Plate Dissipation

    0.2 W

  • Maximum Cathode Current

    5.5 mA

Characteristic

  • Transconductance

    3000 µS

    Typical

  • Plate Resistance

    180000 ohm

    Typical