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Tube Tinker — Electron Tube Database
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Voltage Radio Detector Converter ·Heptode

1C7GETC

Directly heated 2 V pentagrid frequency converter, using 1C7G-equivalent electrical specifications; octal base and miniature top cap.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
G-7Z
Socket code
IO
Base pins
8
Nominal heater
2 V / 120 mA

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
G-7Z
Socket code
IO
Base pins
8
Nominal heater voltage
2 V
Nominal heater current
120 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

G-7Z - 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

Heptode

X-ray radiationInterelectrode capacitances
Plate resistance
600000 Ω
Transconductance
0.00044 S
Max plate voltage
180 V
Max screen voltage
67.5 V
Max plate dissipation
0.3 W
Max screen dissipation
0.2 W
Max cathode current
9 mA

Electrical ratings adopted from existing 1C7G section (ID 6460), as approved. Conversion transconductance; oscillator and mixer pentagrid/heptode. Attached bulletin does not explicitly identify suffix ETC.

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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Heptode

Other

  • Oscillator grid current

    0.2 mA

    1C7G equivalent; Converter

  • Grid resistor

    50000 Ω

    1C7G equivalent; Converter

  • Plate voltage

    180 V

    1C7G equivalent; Converter

  • Screen voltage

    67.5 V

    1C7G equivalent; Converter

  • Control-grid voltage

    -3 V

    1C7G equivalent; Converter

  • Plate current

    1.5 mA

    1C7G equivalent; Converter

  • Screen current

    2 mA

    1C7G equivalent; Converter

  • Oscillator-plate voltage

    180 V

    1C7G equivalent; Converter

  • Oscillator-plate series resistance

    20000 Ω

    1C7G equivalent; Converter

  • Oscillator-plate current

    4 mA

    1C7G equivalent; Converter

Characteristic

  • Plate resistance

    700000 Ω

    1C7G equivalent; Converter

  • Conversion transconductance

    325 µS

    1C7G equivalent; Converter