6486

Reliable Bendix Red Bank miniature dual-control sharp-cutoff RF pentode for aircraft and industrial applications. Extensive run-in and rugged construction target low early-failure rates, long service life, and uniform characteristics.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 250 mA

Description

This miniature nine-pin dual conirol sharp cut-off, R.F. pentode is one of the Bendix Red Bank line of reliable vacuum tubes specifically designed for aircraft and indus- trial applications where freedom from early failure, long average service life and uniform operating characteristics are extremely important. It is intended to replace the 6AS6 in applications where reliability is the primary con- sideration. 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 con- ditions. The use of a coil type heater inside an extruded alu- CHART +. DESIGN CENTER

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: 250 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

Transconductance: 0.00325 S
Max plate voltage: 200 V
Max screen voltage: 155 V
Max plate dissipation: 2 W
Max screen dissipation: 0.85 W
Max cathode current: 18 mA

Published characteristics and ratings promoted where clearly recoverable from source.

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

Pentode

Characteristic

Heater Current
250 mA
Published datasheet value; see source context.
Plate Current
3.5 mA
Published datasheet value; see source context.
Mutual Conductance
3250 µS
Published datasheet value; see source context.

Other

Plate Voltage
180 V
Published datasheet value; see source context.
Grid 2 Voltage
140 V
Published datasheet value; see source context.
Cathode Current
18 mA
Published datasheet value; see source context.