6BR5

Electron-ray visual indicator for receiver tuning or electrical level indication, using a fluorescent display whose pattern changes with control voltage.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 300 mA

Description

Electron-ray visual tuning indicator.

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: 300 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

Tuning Indicator

X-ray radiationInterelectrode capacitances

Max plate voltage: 300 V
Max plate dissipation: 0.2 W

Published Rogers/JETEC/RMA ratings and characteristics promoted where applicable; additional data retained as parameters.

Section 2

Triode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Internal control/amplifier triode section; added during tuning-indicator physical-section reconciliation.

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

1959 Rogers

Published operating points and test conditions from this source.

SECTION 1

Tuning Indicator

Application

Application
Visual tuning indication