8249

Water-cooled ceramic-metal external-anode radial-beam tetrode, electrically identical to the 4CX250B, rated for 300 watts plate dissipation and RF power service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6 V / 2.6 A

Description

The EIMAC 8249/4W300B is a ceramic-metal water-cooled external-anode radial-beam tetrode, electrically identical to the 4CX250B and rated for 300 W plate dissipation.

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: 6 V
Nominal heater current: 2.6 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

Beam Power

X-ray radiationInterelectrode capacitances

Transconductance: 0.012 S
Amplification factor: 5
Max plate voltage: 2000 V
Max screen voltage: 400 V
Max plate dissipation: 300 W
Max screen dissipation: 12 W
Max grid dissipation: 2 W

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.

No source-specific operating conditions are recorded.