4661

Beam-power transmitting tube for professional RF power service, with published condition-specific operating, cooling, and power-output ratings.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 5.5 V / 17.3 A

Description

The 4661 is a beam-power transmitting tube. The supplied datasheet was processed for heater or filament data, maximum ratings, operating characteristics, capacitances, cooling/service conditions, and power-output data. Condition-specific transmitting ratings are retained in the section-parameter table.

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: 5.5 V
Nominal heater current: 17.3 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: 3500 V
Max screen voltage: 1000 V
Max plate dissipation: 1500 W
Max screen dissipation: 50 W
Max cathode current: 1.25 A

forced-air-cooled Cermolox beam-power tube

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
3500 V
Forced-air-cooled RF power service
Maximum DC Screen Voltage
1000 V
Forced-air-cooled RF power service
Maximum DC Plate Current
1.25 A
Forced-air-cooled RF power service
Plate Dissipation
1500 W
Forced-air-cooled RF power service
Screen Input
50 W
Forced-air-cooled RF power service
Typical DC Plate Voltage
2600 V
Forced-air-cooled RF power service
Typical DC Screen Voltage
550 V
Forced-air-cooled RF power service
Useful Power Output
1160 W
Forced-air-cooled RF power service

Characteristics

Mu Factor
6.5
Forced-air-cooled RF power service
Grid-No.1 to Plate Capacitance
0.14 pF
Forced-air-cooled RF power service
Grid-No.1 to Cathode-Heater Capacitance
38 pF
Forced-air-cooled RF power service