8933

Miniature rugged ceramic-metal planar triode for airborne and space pulsed-RF, modulator, switch, and regulator service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 1.3 A

Description

The EIMAC 8933 is a miniature rugged ceramic/metal planar triode for airborne and space pulsed rf, modulator, switch, and regulator service.

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: 6.3 V
Nominal heater current: 1.3 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

Triode

X-ray radiationInterelectrode capacitances

Transconductance: 0.038 S
Amplification factor: 120
Max plate voltage: 10000 V
Max plate dissipation: 150 W
Max grid dissipation: 1.5 W
Max cathode current: 7.5 A

Promoted from printed general-characteristics and absolute-maximum-ratings blocks.

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
120
Transconductance
38000 uS

Other

Maximum DC plate voltage
8000 V
Maximum plate dissipation
150 W
Maximum grid dissipation
1.5 W
Maximum pulse cathode current
7.5 A

Data set 02

1975 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater voltage nominal
6.3 V
Heater current nominal
1.3 A
Transconductance
38000 uS
Amplification factor
120
Cut-off bias
-30 V

Capacitance

Input/grid-cathode capacitance
9.5 pF
Output/plate-cathode capacitance
0.06 pF
Grid-plate/feedback capacitance
1.4 pF

Other

Maximum plate voltage
10000 V
Maximum plate dissipation
150 W
Maximum grid dissipation
1.5 W
Maximum cathode or pulse plate current
7.5 A
Maximum rated frequency
3 GHz
Grid-pulsed DC plate voltage
8000 V
GridPulsed
Plate-pulsed peak plate voltage
10000 V
PlatePulsed
Pulse plate current
5 A
Pulse grid current
2.5 A
Pulse duration
6 us
Duty factor
0.0033
Representative useful output
8000 W
PulsedAmplifier
Representative gain
6 dB
PulsedAmplifier

Data set 03

1976 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater voltage nominal
6.3 V
Heater current nominal
1.3 A
Transconductance
38000 uS
Amplification factor
120
Cut-off bias
-30 V

Capacitance

Input/grid-cathode capacitance
9.5 pF
Output/plate-cathode capacitance
0.06 pF
Grid-plate/feedback capacitance
1.4 pF

Other

Maximum plate voltage
10000 V
Maximum plate dissipation
150 W
Maximum grid dissipation
1.5 W
Maximum cathode or pulse plate current
7.5 A
Maximum rated frequency
3 GHz
Grid-pulsed DC plate voltage
8000 V
GridPulsed
Plate-pulsed peak plate voltage
10000 V
PlatePulsed
Pulse plate current
5 A
Pulse grid current
2.5 A
Pulse duration
6 us
Duty factor
0.0033
Representative useful output
8000 W
PulsedAmplifier
Representative gain
6 dB
PulsedAmplifier