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Voltage Pentode - Remote Cutoff (single) ·Pentode

7694

Premium variable-slope high-frequency pentode for mobile and industrial applications. Designed as a shock- and vibration-resistant replacement for 6BJ6/6662, it combines controlled gain with rugged professional construction.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B7G
Base pins
7
Nominal heater
6.3 V / 150 mA

Description

7694 is a Pentode device in the supplied Amperex literature. Premium variable-slope HF pentode for mobile and industrial applications; shock- and vibration-resistant premium replacement for 6BJ6/6662.

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
6.3 V
Nominal heater current
150 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
1000000 Ω
Transconductance
0.0036 S
Max plate voltage
330 V
Max plate dissipation
3.3 W
Max cathode current
17 mA

Published ratings/characteristics promoted from the source; representative section used for repeated identical systems where applicable.

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

1953 Amperex

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Plate Resistance

    1000000 ohm

  • Transconductance

    3800 µS

  • Amplification Factor

    25

Other

  • Maximum Plate Voltage

    330 V

  • Maximum Plate Dissipation

    3.3 W

  • Maximum Cathode Current

    17 mA

Data set 02

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    250 V

  • Plate current

    9.2 mA

  • Screen voltage

    100 V

  • Screen current

    3.3 mA

Characteristic

  • Plate resistance

    1 MOhm

  • Grid voltage

    -20 V

    Approximate variable-mu operating point

Capacitance

  • Input capacitance

    4.5 pF

  • Output capacitance

    5.2 pF

  • Grid-to-plate capacitance

    0.0035 pF