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Power - Beam (NOT sweep) ·BeamPower

3Q5G

Beam-power amplifier with center-tapped filament for low-voltage battery service, intended primarily for receiver audio-output stages.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
IO
Base pins
-
Nominal heater
2.8 V / 50 mA

Description

Beam-power amplifier tube with center-tapped filament for low-voltage battery service.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
IO
Base pins
-
Nominal heater voltage
2.8 V
Nominal heater current
50 mA
Parallel heater voltage
1.4 V
Parallel heater current
100 mA
Series capable
Yes

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

Beam Power

X-ray radiationInterelectrode capacitances
Plate resistance
100000 Ω
Transconductance
0.0021 S
Max plate voltage
110 V
Max screen voltage
110 V
Max cathode current
12 mA

Published ratings and characteristics promoted semantically from the approved source.

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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristic

  • Plate Resistance

    100000 ohm

  • Transconductance

    2100 µS

Other

  • Maximum Plate Voltage

    110 V

  • Maximum Screen Voltage

    110 V

  • Maximum Cathode Current

    12 mA

  • Plate Voltage

    90 V

    ClassA

  • Screen Voltage

    90 V

    ClassA

  • Maximum Signal Power Output

    270 mW

    ClassA