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Tube Tinker — Electron Tube Database
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Tuning Indicator ·TuningIndicator

EM83

Dual-bar electronic tuning and level indicator with two fluorescent display bars for comparative or simultaneous visual monitoring.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
-
Nominal heater
6.3 V / 300 mA

Description

Dual-bar electronic tuning and level 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
-
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

1 physical section, each with unique specifications.

Section 1

Tuning Indicator

X-ray radiationInterelectrode capacitances
Max plate voltage
300 V
Max plate dissipation
0.5 W
Max cathode current
8 mA

Published ratings and characteristics promoted from the approved 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

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Tuning Indicator

Other

  • Indicator screen voltage

    250 V

  • Indicator screen voltage maximum

    300 V

Characteristic

  • Grid-control range

    0 to -8 V

    Section1

  • Grid-control range

    0 to -16 V

    Section2

  • Indicator bar heights

    4 to 23 / 3 to 18 mm