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Voltage - Dual Triode (similar) ·Triode-Triode

EE80

Special double triode intended for electronic switching and computing applications, designed for logic and control circuits rather than ordinary receiving-tube amplification.

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

Description

Special double triode intended for electronic switching and computing applications. Technical and descriptive data are taken from the supplied English-language Mazda/Thorn-AEI datasheet.

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
Transconductance
0.0125 S
Max plate voltage
250 V
Max screen voltage
250 V
Max plate dissipation
2.5 W
Max screen dissipation
1.3 W

Published ratings and characteristics promoted from the approved English source.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Transconductance
0.0125 S
Max plate voltage
250 V
Max plate dissipation
2.5 W

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

1973 Mazda Valves Binder 2

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater Voltage Vh

    63 V

  • Heater Current Ih

    3 A

  • Maximum Anode Dissipation palmax)

    25 W

  • Maximum Screen Grid Dissipation pg2(max)

    13 W

  • Maximum Anode Voltage Va(max)

    250 V

  • Maximum Screen Grid Voltage Vg2(max)

    250 V

Characteristic

  • Grid 1 to Earth Cm 81 85

    96 pF

  • Anode to Earth cout 26 29

    4 pF

  • Grid 1 to Anode cgl_a 003 0 034 0

    36 pF

  • Anode Voltage Va

    180 V

  • Screen Grid Voltage V82

    180 V

  • Anode Current la

    10 mA

  • Mutual Conductance gm

    125 mA

  • Anode Voltage Va 70

    60 V

  • r~ Screen Grid Voltage VS2 180

    180 V

  • Grid Bias Voltage Vgl —1 —

    1 V

  • Anode Current la 40

    25 mA