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Specialized - Vacuum Capacitor ·Capacitor

K252L

25 pF fixed vacuum capacitor for radio-transmitter tank circuits, rated to approximately 32 kV peak and 20 MHz.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
-

Description

25 pF vacuum condenser for radio-transmitter tank circuits.

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
-
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

Capacitor

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Published ratings/characteristics promoted 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

1946 Standard Telephone and Cables

Published operating points and test conditions from this source.

SECTION 1

Capacitor

Characteristic

  • Capacitance

    25 pF

    Published datasheet value

Other

  • Maximum peak RF voltage

    32 kV

    Published datasheet value

  • Maximum RF current

    12 A

    Published datasheet value

  • Maximum frequency

    20 Mc/s

    Published datasheet value

Data set 02

1947 Standard Valves

Published operating points and test conditions from this source.

SECTION 1

Capacitor

Characteristics

  • Nominal capacitance

    25 pF

    Tolerance ±10%

Other

  • Maximum peak RF voltage

    32 kV

  • Maximum RF current

    12 A

  • Maximum operating frequency

    20 MHz