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Power - Pentode Single (NOT beam) (under 10W) ·Pentode

PEN4VB

Power/output pentode designed for audio-frequency output amplification in receiver or push-pull amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
-

Description

High-sensitivity output pentode electrically identical to PENA4 except for heating time.

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
-
Nominal heater current
-
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
Plate resistance
50000 Ω
Transconductance
0.0095 S
Max plate voltage
250 V
Max screen voltage
250 V
Max plate dissipation
9 W

Electrical characteristics copied from PENA4 because the supplied PEN4VB sheet explicitly states they are identical except heating time.

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

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    250 V

    ClassA

  • Screen voltage

    250 V

    ClassA

  • Plate current

    36 mA

    ClassA

  • Screen current

    5 mA

    ClassA

  • Control-grid voltage

    -5.8 V

    ClassA

  • Optimum load

    8000 ohm

    ClassA

  • Audio output at 10% distortion

    3.8 W

    ClassA

  • Audio output at 5% distortion

    3 W

    ClassA

  • Cathode-bias resistor

    145 ohm

    ClassA

  • Grid resistance maximum

    1 Mohm

Characteristics

  • Grid-current onset range

    -0.3 to -0.8 V

CrossReference

  • Cross-reference / electrical identity

    PENA4