Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Voltage Pentode - Remote Cutoff (single) ·Pentode

W17

Battery-operated variable-mu high-frequency pentode designed for receiver RF and intermediate-frequency amplification.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B7G
Base pins
7
Nominal heater
1.4 V / 50 mA

Description

Miniature directly heated variable-mu RF pentode for battery receivers.

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
1.4 V
Nominal heater current
50 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
Plate resistance
500000 Ω
Transconductance
0.0025 S
Max plate voltage
250 V
Max screen voltage
250 V
Max plate dissipation
2.5 W
Max screen dissipation
0.5 W

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

1955 Marconi

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Heater/Filament Voltage

    1.4 V

  • Transconductance

    2500 uS

  • Plate Resistance

    500000 ohm

Other

  • Maximum/Published Anode Voltage

    250 V

  • Maximum/Published Screen Voltage

    250 V

  • Maximum Anode Dissipation

    2.5 W

  • Maximum Screen Dissipation

    0.5 W

Capacitance

  • Grid-Anode Capacitance

    0.006 pF

  • Input Capacitance

    4.2 pF

  • Output Capacitance

    7 pF