Skip to main content

Voltage - Triode (single) ·Triode

6121

Directly heated subminiature triode for compact electronic service. Available source material does not establish a narrower application confidently.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
1.25 V / 120 mA

Description

Directly heated subminiature Class-C amplifier and frequency-multiplier triode optimized for VHF battery-operated short-life special applications.

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
1.25 V
Nominal heater current
120 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
Transconductance
0.0016 S
Amplification factor
15
Max plate voltage
185 V
Max plate dissipation
1.1 W

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

1938 Raytheon

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater or filament voltage

    1.25 V

    Published nominal value

  • Heater or filament current

    120 mA

    Published nominal or representative value

  • Transconductance

    1600 µS

    Published characteristic

Other

  • Maximum plate dissipation

    1.1 W

    Published maximum rating

  • RF output power

    0.2 W

    160 MHz frequency doubler