1J37B

Directly heated Soviet multi-control pentode for RF amplification, oscillation, and frequency conversion. Two control grids permit mixer and oscillator functions in addition to ordinary amplification in compact battery equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 1.2 V / 59 mA

Description

Universal directly heated pentode with two control grids for RF amplification, oscillation and frequency conversion.

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: 59 mA
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

Max plate voltage: 100 V
Max screen voltage: 60 V
Max cathode current: 4.5 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
0.85 mA
Published Russian-source value; OCR-normalized.
Screen current
0.5 mA
Published Russian-source value; OCR-normalized.
Output capacitance
7 pF
Published Russian-source value; OCR-normalized.
Plate current
8
Published Russian-source value; OCR-normalized.
Screen current
0.25 mA
Published Russian-source value; OCR-normalized.
Heater current
7 mA
Nominal/published heater value.