1K12B

Directly heated Russian pentode designed for high- and intermediate-frequency amplification in automatic-gain-control circuits. Its intended AGC service identifies a variable-gain signal role consistent with remote-cutoff pentode operation.

Directly heatedCold cathodeCommon cathodeDissimilar

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

Description

Directly heated pentode for high- and intermediate-frequency amplification in automatic-gain-control circuits.

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: -
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: 120 V
Max screen voltage: 90 V
Max plate dissipation: 0.6 W
Max screen dissipation: 0.1 W
Max cathode current: 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
0.6 mA
Published Russian-source value; OCR-normalized.
Screen current
0.7 mA
Published Russian-source value; OCR-normalized.
Input capacitance
0.4 pF
Published Russian-source value; OCR-normalized.
Output capacitance
2.7503 pF
Published Russian-source value; OCR-normalized.
Transfer capacitance
0.008 pF
Published Russian-source value; OCR-normalized.
Service life
2000 h
Published Russian-source value; OCR-normalized.
Transconductance
0.6 µS
Published Russian-source value; OCR-normalized.
Heater current
6 mA
Nominal/published heater value.