EM108

Eimac traveling-wave tube with published high-voltage cathode-pulsed operating conditions and low duty cycle; available source text does not establish a narrower application description.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 3 A

Description

Filament Voltage = = == . 7.0 Volts Cathode Voltage = . . o —8000 vdc Peak Cathode Current = = = Pulse Grid Voltage 2.0 adc @~ = +400 to —150 vdc Duty Cycte . . = S 2% Cathode Voltage = = = = —7500 vdc

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: 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

TravelingWave

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Promoted fields populated only where the published value maps directly to the schema; device-specific values retained as parameters.

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

TravelingWave

Other

The EM1
8
The EM108 is an octave bandwidth puls
Filament Voltage = = ==
7 V
Filament Voltage = = == . 7.0 Volts
Cathode Voltage = . . o
-8000 V
Cathode Voltage = . . o —8000 vdc
Pulse Grid Voltage
2 A
Pulse Grid Voltage 2.0 adc
Duty Cycte . . = S
2
Duty Cycte . . = S 2%
Cathode Voltage = = = =
-7500 V
Cathode Voltage = = = = —7500 vdc
Grid Voltage (Beam ofy
1.3 A
Grid Voltage (Beam ofy . . . 1.3 Adc
Grid Voltage (Beam on) . = =
4200 V
Grid Voltage (Beam on) . = = 4200 Vdc
Frequency Range
2
Frequency Range . 2%
Peak Saturated Power Out—Minimum
36 dB
Peak Saturated Power Out—Minimum 36 db
Saturated Gain—Minimum =
1 kW
Saturated Gain—Minimum = . 1.0 kw
Grid Capacitance
30 dB
Grid Capacitance 30 db
Temperature o ~ [1]
65
Temperature o ~65°C to +125°C
Temperature o ~ [2]
125
Temperature o ~65°C to +125°C