2P1P

Directly heated Russian beam-output tube for low-frequency power amplification in battery equipment, delivering modest audio output from economical low-voltage supplies.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B7G
Base pins: 7
Nominal heater: 1.2 V / 120 mA

Description

The 2P1P is a directly heated output beam tetrode designed to amplify low-frequency power.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B7G
Base pins: 7
Nominal heater voltage: 1.2 V
Nominal heater current: 120 mA
Parallel heater voltage: 1.2 V
Parallel heater current: 120 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

Beam Power

X-ray radiationInterelectrode capacitances

Transconductance: 0.0017 S
Max plate voltage: 100 V
Max screen voltage: 100 V
Max plate dissipation: 1.1 W
Max cathode current: 15.5 mA

REDO promoted fields populated from published specification/maximum-rating tables where applicable.

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

195X Russian

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristics

Anode voltage
90 V
Parallel filament connection
Grid 2 voltage
90 V
Parallel filament connection
Grid 1 voltage
-4.5 V
Published operating point
Anode current
9.5 mA
Parallel filament connection
Grid 2 current
2.2 mA
Parallel filament connection
Transconductance
1.7 mA/V
Parallel filament connection
Output power after 1000 h
135 mW
Aging test

Other

Output power
210 mW
Grid 1 AC; 10 kOhm load