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Voltage Pentode - Sharp Cutoff (single) ·Pentode

7KZ6

High-transconductance frame-grid sharp-cutoff pentode designed for television-style high-gain amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
9
Nominal heater
7.3 V / 450 mA

Description

7KZ6 is a frame-grid sharp-cutoff pentode with a dark heater; its sheet gives about 24,000 µS transconductance and television-style high-gain amplifier operating data.

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
7.3 V
Nominal heater current
450 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
45000 Ω
Transconductance
0.024 S
Max plate voltage
330 V
Max screen voltage
330 V
Max plate dissipation
9 W

Published electrical section from supplied RCA data sheet.

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

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Heater voltage nominal

    7.3 V

  • Heater current nominal

    450 mA

  • Plate Voltage Eb

    330 V

    Published source row

  • Grid-No

    2 V

    Published source row

  • Grid-No (value 2)

    330 V

    Published source row

  • Grid No

    2

    Published source row

  • Grid No (value 2)

    2

    Published source row

  • Heater Current Ih

    420 mA

    Published source row

  • Heater Current Ih (value 2)

    480 mA

    Published source row

  • Grid-No

    2

    Published source row

  • For E~

    2 V

    Published source row

  • For E~ (value 2)

    165 V

    Published source row

  • For E~ (value 3)

    330 V

    Published source row

  • Plate Dissipation Pb

    9 W

    Published source row

Characteristics

  • Neater Voltage (AC or DC) Eh

    7.3 V

    Published source row

  • Heater Current Ih

    450 mA

    Published source row

  • Plate Resistance (Approx.) rp

    45

    Published source row

  • Transconductance gm

    24000

    Published source row

  • DC Plate Current Ib

    25 mA

    Published source row

  • DC Grid-No

    2 mA

    Published source row

  • DC Grid-No (value 2)

    3.6 mA

    Published source row

  • Cutoff DC Grid-No. l Voltage. Ecl(co)

    -5.2 V

    Published source row

  • Heater Voltage Eh

    7.3 V

    Published source row

  • DC Plate Supply Voltage Ebb

    250 V

    Published source row

  • DC Grid-No

    2 V

    Published source row

  • DC Grid-No (value 2)

    1 V

    Published source row

  • DC Grid-No (value 3)

    15 V

    Published source row

  • DC Grid-No. l Supply Voltage. Eccl

    0 V

    Published source row

  • Cathode Resistor Rk

    75

    Published source row