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Voltage Pentode ·Pentode

2P29P

Directly heated Russian low-power pentode designed for RF power amplification and oscillator service to approximately 120 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
9
Nominal heater
2.2 V / 120 mA

Description

The 2P29P is a directly heated low-power oscillator pentode for power amplification and oscillation up to 120 MHz.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B9A
Base pins
9
Nominal heater voltage
2.2 V
Nominal heater current
120 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
0.0017 S
Max plate voltage
200 V
Max screen voltage
120 V
Max plate dissipation
1 W
Max screen dissipation
0.3 W
Max cathode current
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

Pentode

Characteristics

  • Anode voltage

    120 V

    Published operating point

  • Grid 1 voltage

    0 V

    Published operating point

  • Grid 3 voltage

    0 V

    Published operating point

  • Anode current

    3 mA

    Published value

  • Grid 2 current

    1 mA

    Published value

  • Transconductance

    1.7 mA/V

    Published value

  • Grid 1 cutoff voltage

    -2.8 V

    At anode current 100 uA

  • Anode-cathode capacitance

    0.012 pF

    Published value

Other

  • Maximum operating frequency

    120 MHz

    Oscillator service