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Tuning Indicator ·Triode-TuningIndicator

EM80

Electron-beam tuning indicator for FM and AM receivers, combining an integral control triode with a distinctive three-petal green fluorescent display.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
B9A
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 300 mA

Description

Electron-beam tuning indicator for FM or AM radio receivers with three curved green fluorescent display petals.

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
B9A
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

B9A - 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

No fixed ratings are recorded for this section.

Published section ratings and characteristics promoted where applicable.

Section 2

Tuning Indicator

X-ray radiationInterelectrode capacitances
Max plate voltage
300 V
Max plate dissipation
0.2 W
Max cathode current
3 mA

Published section ratings and characteristics promoted 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

1958 Mullard Receiving Tubes

Published operating points and test conditions from this source.

SECTION 2

Tuning Indicator

Other

  • Supply voltage

    250 V

  • Target voltage

    250 V

  • Anode resistor

    500 kOhm

  • Control-grid voltage

    -1 V

    ShadowAngle=5deg

  • Control-grid voltage

    -14 V

    ShadowAngle=50deg

  • Target voltage maximum

    300 V

  • Target voltage minimum

    165 V

Data set 02

195X Tesla

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater voltage

    6.3 V

    Published nominal value

  • Heater current

    300 mA

    Published nominal value

Data set 03

1961 Ferranti Technical Handbook

Published operating points and test conditions from this source.

SECTION 2

Tuning Indicator

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    300 mA

  • Display

    Three curved green fluorescent petals

    FMOrAMTuningIndicator

Data set 04

1963 Philips Electron Tubes Handbook V1a

Published operating points and test conditions from this source.

SECTION 2

Tuning Indicator

Other

  • Supply voltage

    250 V

    Indicator

  • Indicator voltage

    250 V

    Indicator

  • Anode resistor

    0.5 MOhm

    Indicator

  • Grid resistor

    3 MOhm

    Indicator

  • Grid voltage

    -1 V

    MaximumShadow

  • Grid voltage

    -14 V

    MinimumShadow

  • Plate current

    0.37 mA

    GridVoltage=-1V

  • Plate current

    0.01 mA

    GridVoltage=-14V

  • Indicator current

    2 mA

    GridVoltage=-1V

  • Indicator current

    2.3 mA

    GridVoltage=-14V

Data set 05

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 2

Tuning Indicator

Characteristic

  • Published electrical datum

    6.3 V

    Chauffage: indirect par C.A. ou C.C,- Ve = 6,3V

  • Published electrical datum

    250 v

    Vg = 250 v

  • Published electrical datum

    250 v

    Ve = 250 v

  • Published electrical datum

    3 MQ

    Rg = 3 MQ

  • Published electrical datum

    -

    -14'V

  • Published electrical datum

    0.01 mA

    I, = 0,37 0,01 mA

  • Published electrical datum

    2.3 mA

    I = 2 2,3 mA

  • Published electrical datum

    165 V

    \/] = min. 165 V

  • Published electrical datum

    -

    ~15 Vgr(v] —10 —5 0

Other

  • Published electrical datum

    550 V

    Va, = max. 550 V

  • Published electrical datum

    300 V

    Va = max. 300 V

  • Published electrical datum

    0.2 W

    Wa = max., 0,2 W

  • Published electrical datum

    550 V

    Vi, = max. 550 V

  • Published electrical datum

    300 V

    Ve = max. 300 V

  • Published electrical datum

    3 µA

    -Vg(Ig=+O,3uA)= max. 1,3 V

  • Published electrical datum

    3 mA

    Iy = max. 3 mA

  • Published electrical datum

    100 V

    Vxf = max. 100 V

  • Heater voltage

    6.3 V

    Nominal heater rating

  • Heater current

    300 mA

    Nominal heater rating