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Voltage - Triode (single) ·Triode

3AI42AY

Special-limits tested telephone repeater triode for professional communications amplification.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
MEDIUM4BAYONET
Base pins
4
Nominal heater
4.5 V / 1 A

Description

Special-limits tested companion version of the 3AI42A repeater triode.

Socket description

Medium 4-contact bayonet base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
MEDIUM4BAYONET
Base pins
4
Nominal heater voltage
4.5 V
Nominal heater current
1 A
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

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
60000 Ω
Transconductance
0.0005 S
Amplification factor
30
Max plate voltage
190 V
Max cathode current
1.5 mA

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

1947 Standard Valves

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • GridToAnodeCapacitance

    7.6 pF

  • GridToCathodeOrFilamentCapacitance

    5.5 pF

  • AnodeToCathodeOrFilamentCapacitance

    5 pF

Other

  • Typical Plate Voltage

    130 V

    GridBias-1.5V

  • Grid Bias

    -1.5 V

  • Typical Plate Current

    0.58 mA

    PlateVoltage130V