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Power - Tetrode (NOT beam) ·Tetrode

4045A

Coplanar-grid power tetrode published under the 4045A designation. Its specialized grid geometry supports high-frequency power operation in professional electronic equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B5
Base pins
5
Nominal heater
5 V / 1.6 A

Description

Printed companion designation 4045A for coplanar-grid tetrode, also published as 4045A.

Socket description

European 5-pin base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B5
Base pins
5
Nominal heater voltage
5 V
Nominal heater current
1.6 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

Tetrode

X-ray radiationInterelectrode capacitances
Plate resistance
3600 Ω
Amplification factor
5.3
Max plate voltage
250 V
Max screen voltage
65 V
Max plate dissipation
45 W
Max cathode current
45 mA

Ratings and characteristics extracted from 4A137B.pdf.

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

1946 Standard Telephone and Cables

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Voltage

    5 v

  • Nominal curren

    1.6 A

  • Grid to anode

    38 pF

  • Inpu

    18 pF

  • Outpu

    9.4 pF

  • Maximum direct anode curren

    45 mA

  • screen and control grids

    150 v

  • positive swing of input voltage

    10 v

  • February 1946

    4 A

  • February 1946

    4 A

  • FILAMENT VOLTAGE =

    5 VOLTS

  • SCREEN VOLTAGE =

    70 VOLTS

  • February 1946

    4 A

  • February 1946

    4 A

Characteristic

  • Va 145V Vg,

    70 V

Data set 02

1947 Standard Valves

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristics

  • GridToAnodeCapacitance

    3.8 pF

  • Input Capacitance

    18 pF

  • Output Capacitance

    9.4 pF

Other

  • MaximumDirectAnodeCurrent

    45 mA