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Voltage Pentode ·Pentode

M8083

Mullard special-quality rugged RF pentode with statistically controlled characteristics for vibration- and shock-prone professional equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 300 mA

Description

The Mullard M8083 is a rugged special-quality RF pentode with statistically controlled characteristics for vibration- and shock-prone equipment.

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
6.3 V
Nominal heater current
300 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
500000 Ω
Transconductance
0.0076 S
Max plate voltage
300 V
Max plate dissipation
3 W

Special-quality RF pentode.

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

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

  • Heater Voltage

    6.3 V

  • Heater Current

    300 mA

  • Plate Voltage

    250 V

  • Screen Voltage

    250 V

  • Plate Current

    10 mA

  • Screen Current

    2.6 mA

  • Grid Voltage

    -2 V

  • Transconductance

    7600 uS

  • Plate Resistance

    500000 ohm

    Minimum

  • Amplification Factor Grid1-to-Grid2

    70 ratio

  • Input Capacitance

    7.1 pF

  • Output Capacitance

    3.4 pF

  • Plate-Grid Capacitance Maximum

    0.01 pF

  • Microphonic Noise Maximum

    25 mV

    2g; 50Hz; RMS

Other

  • Maximum Plate Supply Voltage

    550 V

  • Maximum Plate Voltage

    300 V

  • Maximum Plate Dissipation

    3 W

  • Maximum Shock

    500 g

    SpecialQualityTest