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Voltage - Triode (under 100V) ·Diode-Triode

EAC91

Diode-triode for VHF/UHF frequency-changing service, combining a mixer/detector diode with a triode oscillator. Manufacturer data supports frequency conversion to roughly 300 MHz and oscillation considerably higher.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
B7G
Base pins
7
Nominal heater
6.3 V / 300 mA

Description

Miniature oscillator triode combined with a single diode for UHF frequency-changer service.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B7G
Base pins
7
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

Diode

X-ray radiationInterelectrode capacitances
Max plate voltage
50 V
Max cathode current
5 mA

Published ratings and characteristics promoted from the supplied Brimar source.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
12500 Ω
Transconductance
0.0025 S
Amplification factor
31
Max plate voltage
250 V
Max plate dissipation
2 W
Max cathode current
10 mA

Published ratings and characteristics promoted from the supplied Brimar 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

1951 Mullard Valve and Service Manual

Published operating points and test conditions from this source.

SECTION 2

Triode

Other

  • Plate Voltage

    200 V

    TriodeSection

  • Plate Current

    7.5 mA

    TriodeSection

  • Grid Voltage

    -2.8 V

    TriodeSection

  • Maximum Operating Frequency

    300 MHz

    FrequencyChanger

  • Oscillation Limit Frequency

    600 MHz

Characteristic

  • Transconductance

    2800 µS

    TriodeSection

  • Amplification Factor

    36

    TriodeSection

  • Plate Resistance

    12800 ohm

    TriodeSection

Data set 02

1958 Mullard Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    300 mA

SECTION 2

Triode

Characteristic

  • Plate Voltage

    200 V

  • Plate Current

    5.5 mA

Data set 03

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Diode

Application

  • Application

    Mixer/detector diode

SECTION 2

Triode

Characteristics

  • Triode plate voltage

    200 V

  • Triode plate current

    7.5 mA

  • Triode grid voltage

    -2.8 V

  • Triode transconductance

    2.8 mA/V

  • Triode amplification factor

    36

  • Triode plate resistance

    12800 ohm

Application

  • Application

    Oscillator / UHF frequency changer

Data set 04

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristic

  • Chauffage: indirect par C.A, ou C.C, Ve =

    6.3 V

    Published datasheet value

  • Cg =

    1.7 pF

    Published datasheet value

  • Ca =

    1.2 pF

    Published datasheet value

  • Cag =

    1.7 pF

    Published datasheet value

  • Caa =

    0.4 pF

    Published datasheet value

  • Cxr_xp =

    0.4 pF

    Published datasheet value

  • max

    300 V

    Published datasheet value

  • max

    250 V

    Published datasheet value

  • = max

    10 mA

    Published datasheet value

  • max

    50 V

    Published datasheet value

  • max,

    20 kQ

    Published datasheet value

  • danb max

    350 V

    Published datasheet value

  • I3 max

    5 mA

    Published datasheet value

  • max

    50 mA

    Published datasheet value

  • Fréquence limite en oscillatrice

    600 MHz

    Published datasheet value