5666

High-power transmitting triode with a very heavy directly heated filament for professional RF power service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 11 V / 120 A

Description

5666 is listed in the supplied Amperex material as a high-power transmitting triode. Published ratings and operating characteristics were captured from the supplied 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: 11 V
Nominal heater current: 120 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: 21
Max plate voltage: 10000 V
Max plate dissipation: 12500 W
Max cathode current: 3.2 A

Maximum ratings and general characteristics promoted from the printed service tables.

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

1958 Amperex Industrial

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate voltage
9000 V
RFPowerAmplifier
Plate current
2 A
RFPowerAmplifier
Power output
12200 W
RFPowerAmplifier
Control-grid voltage
-750 V
RFPowerAmplifier
Grid current
210 mA
RFPowerAmplifier
Maximum frequency at full input
22.5 MHz
RFPowerAmplifier
Maximum plate dissipation
12500 W
RFPowerAmplifier

Characteristic

Amplification factor
21
RFPowerAmplifier

Capacitance

Grid-to-plate capacitance
18 pF
Section1
Grid-to-filament capacitance
23.5 pF
Section1
Plate-to-filament capacitance
2.6 pF
Section1

Data set 02

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Filament voltage
11 V
TransmittingService
Filament current
120 A
TransmittingService
Amplification factor
21
TransmittingService

Other

Maximum plate dissipation
12500 W
TransmittingService
Plate voltage
9000 V
TransmittingService
Plate current
2 A
TransmittingService
Power output
12200 W
TransmittingService
Grid bias
-750 V
TransmittingService
Grid current
210 mA
TransmittingService
Maximum frequency
22.5 MHz
FullInputWatts

Data set 03

1971 Machlette Laboratories

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Amplification factor
21

Other

Maximum DC plate voltage
10000 V
Maximum plate dissipation
7500 W
Maximum plate/cathode current
3.2 A