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Power - Triode (over 1000V 100W) ·Triode

3X12500A3

High-current medium-mu power triode for grounded-grid and grounded-filament RF power service.

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

Description

The EIMAC 3X12500A3 is a high-current medium-mu power triode for grounded-grid and grounded-filament RF power 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
7.5 V
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
Amplification factor
20
Max plate voltage
5000 V
Max plate dissipation
12500 W
Max grid dissipation
500 W

Maximum ratings promoted from the printed service-rating tables; typical operating values are preserved as parameters.

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 Eimac

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Plate Filament - - - - - - - - - - - -+ - - - - - - - 5 uuf.

    5 pF

Other

  • Maximum plate voltage

    5000 V

  • Maximum plate dissipation

    12500 W

  • Maximum grid dissipation

    500 W