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Voltage Radio Detector Converter ·Heptode-Triode

6C31

Mazda triode-heptode radio frequency changer.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 800 mA

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
800 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 0

Triode

X-ray radiationInterelectrode capacitances
Amplification factor
16
Max plate voltage
150 V

Triode oscillator of triode-heptode frequency changer; typical Va 80 V, Ia 5 mA.

Section 1

Heptode

X-ray radiationInterelectrode capacitances
Max plate voltage
250 V
Max screen voltage
250 V

Heptode converter; typical Va 250 V, screen 100 V, anode current 3–3.8 mA.

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

1960 Mazda

Published operating points and test conditions from this source.

SECTION 0

Triode

Characteristic

  • Plate Voltage

    80 V

    Typical triode anode voltage

Other

  • Heater/filament voltage

    6.3 V

    Heater voltage

  • Heater/filament current

    800 mA

    Heater current

SECTION 1

Heptode

Characteristic

  • Plate Voltage

    250 V

    Typical heptode anode voltage