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Tube Tinker — Electron Tube Database
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Power - Triode ·Triode

50CA10

Power triode documented for amplifier or control service, with manufacturer operating data emphasizing useful power output rather than small-signal voltage amplification. Its available documentation does not justify a narrower specialized functional category.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B12C
Base pins
12
Nominal heater
50 V / 175 mA

Description

Duodecal indirectly heated triode intended for audio power-amplifier service, with low plate resistance and published Class A / Class AB1 operating data.

Socket description

Duodecar 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B12C
Base pins
12
Nominal heater voltage
50 V
Nominal heater current
175 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
620 Ω
Transconductance
0.014 S
Amplification factor
8
Max plate voltage
900 V
Max plate dissipation
30 W
Max cathode current
200 mA

Audio power triode; maximum and static-characteristic values promoted from the printed sheet.

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

1961 Matsushita

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Static plate voltage

    250 V

  • Static grid voltage

    -22 V

  • Static plate current

    80 mA

Other

  • Maximum plate current

    - to 200 mA

  • Class A output power

    6 W

    ClassA

  • Class AB1 push-pull output power

    34 W

    ClassAB,PushPull,TwoTubes