6385

Bendix Red Bank miniature double triode engineered for aircraft and industrial equipment where high reliability, long service life, uniform characteristics, and resistance to shock and vibration are especially important.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 500 mA

Description

This miniature nine-pin double triode is one of the Bendix Red Bank line of reliable vacuum tubes specifically designed for aircraft and industrial applications where freedom from early failure, long average service life, and uniform operating characteristics are extremely important. It is intended to replace the 2C51 or the 5670 in applica- tions where reliability is the primary consideration. Each tube is given a 45-hour run-in under various overload, vibration, and shock conditions likely to be encountered in service. This run-in serves to reduce early failures by eliminating tubes with any minor defects that might lead to failure under actual operating conditions. The use of a coil type heater inside an extruded alu- mina insulator gives a long life heater structure which

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: 500 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

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Transconductance: 0.005 S
Amplification factor: 35
Max plate voltage: 300 V
Max plate dissipation: 1.5 W

Published characteristics and ratings promoted where clearly recoverable from source.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Transconductance: 0.005 S
Amplification factor: 35
Max plate voltage: 300 V
Max plate dissipation: 1.5 W

Second identical physical triode section; added to align rows with SectionCount.

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

196X Bendix

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater Current
500 mA
Published datasheet value; see source context.
Plate Current
25 mA
Published datasheet value; see source context.
Mutual Conductance
5000 µS
Published datasheet value; see source context.
Transconductance
6500 µS
Published datasheet value; see source context.
Amplification Factor
35
Published datasheet value; see source context.

Other

Plate Voltage
300 V
Published datasheet value; see source context.
Cathode Current
25 mA
Published datasheet value; see source context.