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Voltage Pentode ·Pentode

2J48B

Russian pentode documented in technical reference literature; available source does not clearly establish a narrower specialized application.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
2.4 V / -

Description

2J48B pentode from a Russian vacuum-tube reference; technical description translated to English.

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
2.4 V
Nominal heater current
-
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
Transconductance
0.0024 S
Max plate dissipation
0.6 W

Electrical values extracted only from the filename-designated tube block; page-edge fragments excluded.

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

1981 Russian Tubes Katsnelson and Larionov

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

  • Transconductance

    5 mA

    Крутизна характеристики . . . . , . .. ., Е ЗдБЁЁ 5 мА /В

  • Transconductance

    >2.4 mA/V

    крутизна характеристики >2,4 мА/В

  • Heater voltage

    2.16—2.64 V

    Напряжение накала . . . . . . . ., ,. 2,16—2,64 В

  • Plate voltage

    0 V

    Напряжение анода . . . . . .. ., ,, 00 В

Other

  • Plate dissipation

    0.6 W

    Мощность, рассеиваемая анодом у й 0,6 Вт