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Voltage Tetrode ·Tetrode

322

Screen-grid tetrode intended for receiver voltage amplification, detector, oscillator, or general Class-A service as documented by the manufacturer.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
UX4
Base pins
4
Nominal heater
6.3 V / 950 mA

Description

The 322 is a screen-grid amplifier described in the Cunningham Radio Tube Manual for detector, amplifier, oscillator, rectifier, or power-output service as applicable to the type.

Socket description

Medium-shell UX 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
UX4
Base pins
4
Nominal heater voltage
6.3 V
Nominal heater current
950 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

Tetrode

X-ray radiationInterelectrode capacitances
Transconductance
0.0005 S
Max plate voltage
180 V
Max screen voltage
67.5 V
Max plate dissipation
15 W

Promoted fields populated from explicitly published ratings/characteristics; service-specific data retained as parameters.

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

193X Cunningham

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristics

  • Heater/filament voltage

    3.3 V

    Published nominal

  • Heater/filament current

    132 mA

    Published nominal

  • Transconductance

    500 uS

    Published characteristic

Data set 02

1971 Machlette Laboratories

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • The ML

    322 mA

    The ML-322 is an ultra-high-frequency diode of the ring-type seals, making the tube ideally suited to cavity-type

  • Heater Voltage

    6.3 V

    Heater Voltage . 6.3 Volts

  • Heater Current at [1]

    6.3 V

    Heater Current at 6.3 volts, approximate . .95 Amps

  • Heater Current at [2]

    95 V

    Heater Current at 6.3 volts, approximate . .95 Amps

  • Heater Heating Time, minimum (Before Applying Plate Voltage) »

    60 s

    Heater Heating Time, minimum (Before Applying Plate Voltage) » 60 Seconds

  • Interclectrode Capacitance

    3.5 pF

    Interclectrode Capacitance 3.5 uuf

  • Maximum Seal Temperature

    160 mA

    Maximum Seal Temperature .. 160 °C

  • Peak Plate Current ... ... ... . . e

    600 mA

    Peak Plate Current ... ... ... . . e 600 mAdc

  • Average Plate Current

    100 mA

    Average Plate Current ... ... 100 mAdc

  • Average Plate Dissipation

    15

    Average Plate Dissipation ... 15 wates®

  • *Plate dissipation up to

    100 mA

    *Plate dissipation up to 100 watts may be obtained with forced-air cooling.