1J29BR

Ruggedized Russian high-frequency pentode designed for voltage amplification. Its strengthened construction supports RF signal service under demanding mechanical conditions while retaining the compact form of a miniature directly heated pentode.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 1.2 V / 60 mA

Description

High-frequency ruggedized pentode for voltage amplification.

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: 1.2 V
Nominal heater current: 60 mA
Parallel heater voltage: 1.2 V
Parallel heater current: 60 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

Pentode

X-ray radiationInterelectrode capacitances

Max plate voltage: 150 V
Max screen voltage: 120 V
Max plate dissipation: 1.2 W
Max screen dissipation: 0.35 W
Max cathode current: 8 mA

Values promoted where clearly identifiable from Russian 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

1981 Russian Tubes Katsnelson and Larionov

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Plate current
7 mA
Published Russian-source value; OCR-normalized.
Screen current
0.5
Published Russian-source value; OCR-normalized.
Transconductance
0.8 µS
Published Russian-source value; OCR-normalized.
Input capacitance
0.6
Published Russian-source value; OCR-normalized.
Output capacitance
0.6 V
Published Russian-source value; OCR-normalized.
Transfer capacitance
6 h
Published Russian-source value; OCR-normalized.
Service life
5000
Published Russian-source value; OCR-normalized.
Transconductance
1.2 µS
Published Russian-source value; OCR-normalized.
Plate current
1.5 mA
Published Russian-source value; OCR-normalized.
Screen current
0.4 mA
Published Russian-source value; OCR-normalized.
Transconductance
0.5 µS
Published Russian-source value; OCR-normalized.
Input capacitance
0.6 pF
Published Russian-source value; OCR-normalized.
Output capacitance
5 pF
Published Russian-source value; OCR-normalized.
Transfer capacitance
5 pF
Published Russian-source value; OCR-normalized.
Service life
85 h
Published Russian-source value; OCR-normalized.
Transconductance
1.2 V
Published Russian-source value; OCR-normalized.
Heater voltage
0.05 V
Nominal/published heater value.
Heater current
8 mA
Nominal/published heater value.