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Power - Pentode (NOT beam) ·Pentode

FL152

Radiation-cooled 85 W transmitting pentode designed for short-wave and VHF RF service, also suitable for audio-frequency amplification. Its primary role is medium-power radio-frequency generation or amplification.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B5
Base pins
5
Nominal heater
6.3 V / 1.55 A

Description

Radiation-cooled 85-watt transmitting pentode for short-wave and VHF RF service, also suitable for audio-frequency amplification.

Socket description

European 5-pin base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B5
Base pins
5
Nominal heater voltage
6.3 V
Nominal heater current
1.55 A
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
0.004 S
Max plate voltage
1000 V
Max screen voltage
300 V
Max plate dissipation
40 W
Max screen dissipation
5 W
Max grid dissipation
1 W
Max cathode current
230 mA

Promoted values come from the supplied datasheet; additional ratings, characteristics, and operating points are retained in TUBE_SECTION_PARAMETER.

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

1959 Telefunken

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate peak voltage

    3000 V

  • Plate voltage

    1000 V

    RFAmplifier;f<=46MHz

  • Screen-grid voltage

    300 V

    RFAmplifier

  • Plate current

    100 mA

    RFAmplifier

  • RF output power

    83.5 W

    RFAmplifier

  • Maximum wavelength limit

    2.5 m

Capacitance

  • Input capacitance

    14.5 pF

  • Output capacitance

    10 pF

  • Grid-to-plate capacitance maximum

    0.09 pF