5771

Very-high-power industrial and communications transmitting triode. Rated for 22.5 kW plate dissipation and 15 kV plate voltage, with published RF operating points producing roughly 44–49 kW output at frequencies to about 25 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 7.5 V / 170 A

Description

5771 is listed in the supplied Amperex material as a high-emission industrial/communications transmitting triode. Published ratings and 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: 7.5 V
Nominal heater current: 170 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: 20
Max plate voltage: 15000 V
Max plate dissipation: 22500 W
Max cathode current: 35 A

water/air-cooled power triode

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
12500 V
RFPowerAmplifier
Plate current
4.8 A
RFPowerAmplifier
Power output
49000 W
RFPowerAmplifier
Control-grid voltage
-630 V
RFPowerAmplifier
Grid current
750 mA
RFPowerAmplifier
Maximum frequency at full input
25 MHz
RFPowerAmplifier
Maximum plate dissipation
22500 W
RFPowerAmplifier

Characteristic

Amplification factor
20
RFPowerAmplifier

Capacitance

Grid-to-plate capacitance
24.5 pF
Section1
Grid-to-filament capacitance
17 pF
Section1
Plate-to-filament capacitance
3 pF
Section1

Data set 02

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Filament voltage
7.5 V
TransmittingService
Filament current
170 A
TransmittingService
Amplification factor
20
TransmittingService

Other

Maximum plate dissipation
22500 W
TransmittingService
Plate voltage
12500 V
TransmittingService
Plate current
4.8 A
TransmittingService
Power output
44000 W
TransmittingService
Grid bias
-630 V
TransmittingService
Grid current
750 mA
TransmittingService
Maximum frequency
25 MHz
FullInputWatts

Data set 03

1971 RCA HB3 Binder 6 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Maximum DC Plate Voltage
15000 V
Water/forced-air-cooled power triode
Plate Dissipation
22.5 kW
Water/forced-air-cooled power triode
Typical DC Plate Voltage
12500 V
Water/forced-air-cooled power triode
Maximum-Signal Power Output
55 kW
Water/forced-air-cooled power triode
Peak Cathode Current
35 A
Water/forced-air-cooled power triode

Characteristics

Amplification Factor
20
Water/forced-air-cooled power triode
Grid-to-Plate Capacitance
24.5 pF
Water/forced-air-cooled power triode
Grid-to-Filament Capacitance
47 pF
Water/forced-air-cooled power triode
Plate-to-Filament Capacitance
3 pF
Water/forced-air-cooled power triode