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Voltage - Triode (single) ·Triode

GR15

Cold-cathode gas triode for relay, trigger, timing, counting, or automatic control switching.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
9
Nominal heater
-

Description

Cold-cathode gas relay triode with molybdenum cathode and slight tritium preionization for sensitive DC control, timers, counting circuits and automatic switching.

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
-
Socket code
B9A
Base pins
9
Nominal heater voltage
-
Nominal heater current
-
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

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Max cathode current
15 mA

Cold-cathode switching/relay/display section; device-specific glow-discharge values preserved in parameter table.

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

1962 Cerberus

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • BreakdownVoltageAK

    300 to - V

  • StarterBreakdownVoltage

    120 to 140 V

    Starter positive

  • SustainingVoltageAK

    103 to 112 V

    At 15 mA

Other

  • Cathode Current

    10 to 40 mA

  • Anode Supply Voltage

    150 to 270 V

    Typical