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

4C33

Forced-air-cooled power triode for plate-pulsed Class-C oscillator service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
SEPTAR7
Base pins
-
Nominal heater
5 V / 9.1 A

Description

Forced-air-cooled power triode for plate-pulsed Class-C oscillator service.

Socket description

Septar 7-contact base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
SEPTAR7
Base pins
-
Nominal heater voltage
5 V
Nominal heater current
9.1 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
25
Max plate voltage
13000 V
Max plate dissipation
250 W
Max cathode current
30 A

Published RCA ratings and characteristics promoted where applicable; additional values retained 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

1956 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Maximum full-rating frequency

    625 MHz

  • Peak plate pulse voltage

    13000 V

    Pulse

  • Peak plate current

    30 A

    Pulse

Construction

  • Cooling method

    Forced air