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Y503

Eimac high-reliability rugged planar power triode for airborne pulsed RF service to approximately 3 GHz. Substantial plate dissipation and multi-kilovolt capability support demanding military microwave equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

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

Description

The EIMAC Y503 is a high-reliability rugged planar triode for airborne pulsed rf service to 3 ghz.

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: 1 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

Transconductance: 0.03 S
Amplification factor: 80
Max plate voltage: 2500 V
Max plate dissipation: 100 W
Max grid dissipation: 2 W
Max cathode current: 3 A

Promoted from printed planar-triode general characteristics and pulsed/CW maximum ratings.

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

1962 Eimac

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Amplification factor
80
Transconductance
30000 uS

Other

Maximum plate voltage
2500 V
Maximum plate dissipation
100 W
Maximum grid dissipation
2 W
Maximum pulse cathode current
3 A

Data set 02

1975 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater voltage nominal
6 V
Heater current nominal
1 A
Transconductance
25000 uS
Amplification factor
80

Capacitance

Input/grid-cathode capacitance
6.8 pF
Output/plate-cathode capacitance
0.04 pF
Grid-plate/feedback capacitance
2.5 pF

Other

Maximum plate voltage
3500 V
Maximum plate dissipation
100 W
Maximum grid dissipation
2 W
Maximum cathode or pulse plate current
3 A
Maximum rated frequency
3 GHz
Grid-pulsed DC plate voltage
2500 V
GridPulsed
Plate-pulsed peak plate voltage
3500 V
PlatePulsed
Pulse plate current
3 A
Pulse grid current
1.5 A
Conduction/convection plate dissipation
10 W
Plate dissipation with adequate cooling
100 W
Pulse duration
6 us
Duty factor
0.0033
Representative plate voltage
2000 V
GridPulsedOscillator
Representative useful output
750 W
GridPulsedOscillator
Representative frequency
1.09 GHz
GridPulsedOscillator

Data set 03

1976 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater voltage nominal
6 V
Heater current nominal
1 A
Transconductance
25000 uS
Amplification factor
80

Capacitance

Input/grid-cathode capacitance
6.8 pF
Output/plate-cathode capacitance
0.04 pF
Grid-plate/feedback capacitance
2.5 pF

Other

Maximum plate voltage
3500 V
Maximum plate dissipation
100 W
Maximum grid dissipation
2 W
Maximum cathode or pulse plate current
3 A
Maximum rated frequency
3 GHz
Grid-pulsed DC plate voltage
2500 V
GridPulsed
Plate-pulsed peak plate voltage
3500 V
PlatePulsed
Pulse plate current
3 A
Pulse grid current
1.5 A
Conduction/convection plate dissipation
10 W
Plate dissipation with adequate cooling
100 W
Pulse duration
6 us
Duty factor
0.0033
Representative plate voltage
2000 V
GridPulsedOscillator
Representative useful output
750 W
GridPulsedOscillator
Representative frequency
1.09 GHz
GridPulsedOscillator