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Voltage Pentode - Sharp Cutoff (single) ·Pentode

6HM6

Frame-grid sharp-cutoff pentode for high-gain television intermediate-frequency amplifier stages.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
9PM
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 300 mA

Description

The 6HM6 is a frame-grid, sharp-cutoff 9-pin miniature pentode designed for television intermediate-frequency amplifier stages.

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
9PM
Socket code
B9A
Base pins
9
Nominal heater voltage
6.3 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9PM - 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
156000 Ω
Transconductance
0.015 S
Max plate voltage
250 V
Max screen voltage
250 V
Max plate dissipation
2.5 W
Max screen dissipation
0.6 W
Max cathode current
25 mA

Promoted values are from the supplied Westinghouse family sheet; additional published 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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate Voltage

    125 V

    Published operating/characteristic table

  • Screen Voltage

    2 V

    Published operating/characteristic table

  • Grid Voltage

    -3 V

    Published operating/characteristic table

Characteristic

  • Plate Current

    13 mA

    Published operating/characteristic table

  • Screen Current

    3.2 mA

    Published operating/characteristic table

  • Transconductance

    15000 uS

    Published operating/characteristic table

  • Plate Resistance

    0.156 ohm

    Published operating/characteristic table

Data set 02

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    125 V

  • Screen-grid voltage

    125 V

  • Cathode bias resistor

    56 Ohm

  • Plate current

    13 mA

  • Screen-grid current

    3.2 mA

Characteristics

  • Plate resistance

    156000 Ohm

  • Transconductance

    15000 uS

  • Control-grid cutoff voltage

    -3 V

  • Hot input resistance

    13500 Ohm

Capacitance

  • Grid-to-plate capacitance

    0.024 pF

    Shielded

  • Input capacitance

    8.7 pF

    Shielded

  • Output capacitance

    3 pF

    Shielded

Data set 03

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

  • Grid-to-plate capacitance

    0.024 pF

  • Input capacitance

    8.7 pF

  • Output capacitance

    3 pF

Other

  • Plate voltage

    125 V

    ClassA1

  • Screen voltage

    125 V

    ClassA1

  • Cathode resistor

    56 ohm

    ClassA1

  • Plate current

    13 mA

    ClassA1

  • Screen current

    3.2 mA

    ClassA1

Characteristics

  • Hot input resistance

    13000 ohm

    At40MHz

  • Hot input capacitance

    7.4 pF

    At40MHz