Y690

Specially processed 8941-family planar triode for series-regulator, switch, and pulse-modulator service, with 750-watt plate dissipation.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 2.25 A

Description

The EIMAC Y690 is a specially processed 8941-family planar triode for series-regulator, switch, and pulse-modulator 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: 2.25 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: 0.1 S
Amplification factor: 200
Max plate voltage: 10000 V
Max plate dissipation: 750 W
Max grid dissipation: 2 W
Max cathode current: 750 mA

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
200
Transconductance
100000 uS

Other

Maximum DC plate voltage
10000 V
Maximum plate dissipation
750 W
Maximum grid dissipation
2 W
Maximum pulse cathode current
16 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
2.25 A
Transconductance
75000 uS
Amplification factor
200
Cut-off mu
90
PulseModulator

Capacitance

Input/grid-cathode capacitance
14 pF
Output/plate-cathode capacitance
0.11 pF
Grid-plate/feedback capacitance
2.5 pF

Other

Maximum plate voltage
18000 V
Maximum plate dissipation
750 W
Maximum grid dissipation
2 W
Maximum cathode or pulse plate current
16 A
Maximum rated frequency
2 GHz
Pulse-modulator DC plate voltage
15000 V
PulseModulator
Pulse-modulator peak plate voltage
18000 V
PulseModulator
Pulse cathode current
16 A
PulseModulator
DC plate current
600 mA
PulseModulator
Pulse duration
6 us
PulseModulator
Duty factor
0.0033
PulseModulator

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
2.25 A
Transconductance
75000 uS
Amplification factor
200
Cut-off mu
90
PulseModulator

Capacitance

Input/grid-cathode capacitance
14 pF
Output/plate-cathode capacitance
0.11 pF
Grid-plate/feedback capacitance
2.5 pF

Other

Maximum plate voltage
18000 V
Maximum plate dissipation
750 W
Maximum grid dissipation
2 W
Maximum cathode or pulse plate current
16 A
Maximum rated frequency
2 GHz
Pulse-modulator DC plate voltage
15000 V
PulseModulator
Pulse-modulator peak plate voltage
18000 V
PulseModulator
Pulse cathode current
16 A
PulseModulator
DC plate current
600 mA
PulseModulator
Pulse duration
6 us
PulseModulator
Duty factor
0.0033
PulseModulator