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Voltage Pentode ·Pentode

7737

Premium-quality rugged pentode specified for a 10,000-hour service life. Amperex documentation emphasizes extended operating life and robust construction, making reliability and longevity its defining distinctions.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 320 mA

Description

7737 is a Pentode device in the supplied Amperex literature. Premium-quality 10,000-hour rugged pentode.

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
6.3 V
Nominal heater current
320 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
100000 Ω
Transconductance
0.0165 S
Max plate voltage
210 V
Max screen voltage
175 V
Max plate dissipation
3 W
Max screen dissipation
0.7 W
Max cathode current
25 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

    100000 ohm

  • Transconductance

    16500 µS

  • Amplification Factor

    53

Other

  • Maximum Plate Voltage

    210 V

  • Maximum Screen Voltage

    175 V

  • Maximum Plate Dissipation

    3 W

  • Maximum Screen Dissipation

    0.7 W

  • Maximum Cathode Current

    25 mA

Data set 02

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

  • Input capacitance

    7.6 pF

  • Output capacitance

    3.3 pF

Other

  • Cathode resistor

    630 ohm

  • Anode current

    13 mA

  • Screen current

    3.3 mA

Characteristic

  • Transconductance

    16500 uS

  • Amplification factor

    53

  • Plate resistance

    0.1 MOhm