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Voltage - Triode (under 100V) ·Triode

AC761

Subminiature triode for microphone and low-frequency preamplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
4 V / 105 mA

Description

Subminiature triode for microphone and low-frequency preamplifier service.

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
4 V
Nominal heater current
105 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

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
9500 Ω
Transconductance
0.0023 S
Amplification factor
22
Max plate voltage
60 V
Max plate dissipation
0.5 W
Max cathode current
5 mA

Published ratings and characteristics promoted where clearly stated; identical repeated sections compressed when applicable.

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

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater or filament voltage

    4 V

    Published nominal value

  • Heater or filament current

    105 mA

    Published nominal value

  • Transconductance

    2300 µS

    Published operating characteristic