1K1P

Russian directly heated miniature pentode for high-frequency voltage amplification in battery-operated receivers. Its oxide-coated 1.2 V, 60 mA filament supports low-voltage RF amplification with nominal transconductance of 0.89 mA/V.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: 7
Nominal heater: 1.2 V / 60 mA

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: 7
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

Transconductance: 0.00089 S

Russian 1K1P directly heated miniature high-frequency voltage amplifier pentode, oxide-coated filament 1.2 V 60 mA (53–67 mA published range) and seven-pin base. Published typical anode voltage 90 V, screen grid 67.5 V, anode current about 4 mA (2.3–4.7 mA specified range), and transconductance 0.89 mA/V (0.00089 S). The source does not designate typical voltages as absolute operating maxima, so corresponding max voltage fields remain NULL.

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

2026 Russian Receiving

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate Current
4 mA
Screen Voltage
67.5 V
Plate Voltage
90 V