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

6257

Coaxial-electrode power triode for induction and dielectric heating plus FM-broadcast transmitter service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
12.6 V / 29 A

Description

The Machlett 6257 is a coaxial-electrode power triode for induction/dielectric heating and fm broadcast 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
12.6 V
Nominal heater current
29 A
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
6000 V
Max plate dissipation
5000 W
Max cathode current
1.5 A

Maximum ratings and general characteristics promoted from the printed service tables.

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

1971 Machlette Laboratories

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Amplification factor

    20

Other

  • Maximum DC plate voltage

    6000 V

  • Maximum plate dissipation

    5000 W

  • Maximum plate/cathode current

    1.5 A