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Voltage - Triode (single) ·Triode

H12

Midget directly heated triode for early stages of hearing-aid and other compact low-power amplifiers.

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

Description

Midget triode for early stages of deaf-aid and compact amplifiers.

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
-
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

No fixed ratings are recorded for this section.

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

1955 Marconi

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Grid-Anode Capacitance

    4.3 pF

  • Grid-Cathode Capacitance

    2.5 pF

  • Anode-Cathode Capacitance

    1.6 pF

Characteristic

  • HT Voltage

    36-52 V

  • Anode Load Resistance

    0.25 MOhm

  • Voltage Gain

    15