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7842

Conduction-cooled beam-power tube for UHF linear RF amplification, delivering roughly 80 W at 400 MHz and 40 W at 1.215 GHz.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 3.2 A

Description

The 7842 is a beam-power transmitting tube. The supplied datasheet was processed for heater or filament data, maximum ratings, operating characteristics, capacitances where published, and service-specific power or frequency data.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B9A
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 3.2 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

Max plate voltage: 1000 V
Max screen voltage: 300 V
Max plate dissipation: 115 W
Max cathode current: 180 mA

Published ratings/characteristics promoted from supplied datasheet.

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 RCA HB3 Binder 6 of 7

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Maximum DC Plate Voltage
1000 V
Conduction-cooled linear RF power amplifier
Maximum DC Screen Voltage
300 V
Conduction-cooled linear RF power amplifier
Maximum DC Plate Current
180 mA
Conduction-cooled linear RF power amplifier
Plate Dissipation
115 W
Conduction-cooled linear RF power amplifier
CW Power Output at 400 MHz
80 W
Conduction-cooled linear RF power amplifier
CW Power Output at 1215 MHz
40 W
Conduction-cooled linear RF power amplifier

Characteristics

Mu Factor, Screen to Control Grid
18
Conduction-cooled linear RF power amplifier
Minimum Heating Time
60 s
Conduction-cooled linear RF power amplifier