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2C39WA

Ruggedized 2C39-family UHF transmitting triode for demanding military and professional equipment. Its high-transconductance ceramic-metal construction supports oscillator, multiplier, and power-amplifier operation into the microwave region while emphasizing resistance to severe service conditions.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 5.8 V / 1 A

Description

Rugged ceramic/metal planar triode for CW/pulsed oscillator, amplifier, frequency multiplier, pulse modulator or regulator 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: 5.8 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: 0.025 S
Amplification factor: 100
Max plate voltage: 1000 V
Max plate dissipation: 100 W
Max grid dissipation: 2 W
Max cathode current: 125 mA

Promoted fields populated from published ratings/characteristics; additional published values retained in TUBE_SECTION_PARAMETER.

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

Heater Current
900 mA to 1.05 A

Capacitance

Grid-Cathode Capacitance
5.6 to 7 pF
Grid-Plate Capacitance
1.95 to 2.15 pF
Plate-Cathode Capacitance Maximum
0.035 pF

Other

Frequency for Maximum Ratings
2.5 GHz
Pulse Plate Voltage Maximum
3500 V
PlatePulsed
Pulse Plate Current Maximum
3 A
PlatePulsed
Pulse Cathode Current Maximum
4.8 A
PulseModulator
Typical CW Useful Output
40 W
Frequency=500MHz

Data set 02

1965 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater: Voltage
5.8 V
Heater: Voltage - 5.8 Volts
Current (Ef= [1]
5.8 A
Current (Ef=5.8v) 0.87 I.03 ampere
Current (Ef= [2]
870 mA
Current (Ef=5.8v) 0.87 I.03 ampere
Current (Ef= [3]
3 A
Current (Ef=5.8v) 0.87 I.03 ampere
Frequency for Maximum Ratings
2500
Frequency for Maximum Ratings - 2500 mc
Gri d-Cathode [1]
5.6
Gri d-Cathode - - 5.6 7.6 uuf
Gri d-Cathode [2]
7.6
Gri d-Cathode - - 5.6 7.6 uuf
plate-Cathode
0.035
plate-Cathode - 0.035 uuf
Maximum Seal and Anode Core Temperature
2
Maximum Seal and Anode Core Temperature 2!f yJf) C
D-C PLATE VOLTAGE [1]
6 V
D-C PLATE VOLTAGE 6cO 1000 MAX. VOLTS
D-C PLATE VOLTAGE [2]
1000 V
D-C PLATE VOLTAGE 6cO 1000 MAX. VOLTS
D-C CATHODE CURRENT loo
125 mA
D-C CATHODE CURRENT loo 125 MA:X. NIA
D-C GRID VOLTAGE
-150 V
D-C GRID VOLTAGE - - -150 -i5O Aluex. vOLTs
D-C GRID CURRENT [1]
50 mA
D-C GRID CURRENT - 50 50 MAX. RA
D-C GRID CURRENT [2]
50 mA
D-C GRID CURRENT - 50 50 MAX. RA
INSTANTANEOUS PEAK POSITIVE GRID VOLTAGE [1]
50 V
INSTANTANEOUS PEAK POSITIVE GRID VOLTAGE 50 30 MAX. VOLTS
INSTANTANEOUS PEAK POSITIVE GRID VOLTAGE [2]
30 V
INSTANTANEOUS PEAK POSITIVE GRID VOLTAGE 50 30 MAX. VOLTS
EEiiE INSTANTANEOUS PEAK NEGATIVE GRID VOLTAGE [1]
400 V
EEiiE INSTANTANEOUS PEAK NEGATIVE GRID VOLTAGE 400 400 MAX. VOLTS
EEiiE INSTANTANEOUS PEAK NEGATIVE GRID VOLTAGE [2]
400 V
EEiiE INSTANTANEOUS PEAK NEGATIVE GRID VOLTAGE 400 400 MAX. VOLTS
PLATE DISSIPATloN (WITH [1]
12.5
PLATE DISSIPATloN (WITH 12.5 CFM AIR FLCW} - 70 loo RAX. WATTS
PLATE DISSIPATloN (WITH [2]
70
PLATE DISSIPATloN (WITH 12.5 CFM AIR FLCW} - 70 loo RAX. WATTS
GRID DISSIPATloN [1]
2
GRID DISSIPATloN - 2 2 New. w^FTs
GRID DISSIPATloN [2]
2
GRID DISSIPATloN - 2 2 New. w^FTs

Data set 03

1971 Machlette Laboratories

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

The ML [1]
2
The ML-2C39WA is a ruggedized high-mu triode of its low interelectrode capacitances and compact, rugged ring-
The ML [2]
9
The ML-2C39WA is a ruggedized high-mu triode of its low interelectrode capacitances and compact, rugged ring-
lator, frequency multiplier or power amplifier in radio trans- The ML [1]
2
lator, frequency multiplier or power amplifier in radio trans- The ML-2C39WA is the result of an intensive develop-
lator, frequency multiplier or power amplifier in radio trans- The ML [2]
9
lator, frequency multiplier or power amplifier in radio trans- The ML-2C39WA is the result of an intensive develop-
Heater Current (AC-or DC) at [1]
6 V
Heater Current (AC-or DC) at 6.0 Volts .. .......................................................... 1.0 Amp
Heater Current (AC-or DC) at [2]
1 V
Heater Current (AC-or DC) at 6.0 Volts .. .......................................................... 1.0 Amp
Heater Heating Time, minimum
60 s
Heater Heating Time, minimum . ........................................... 60 secs
Amplification Factor
100
Amplification Factor .. .............................................. 100
Frequency for Maximum Ratings
2500 mA
Frequency for Maximum Ratings 2500 Mc
Maximum Anode Temperature
200 mA
Maximum Anode Temperature 200 °C
D-C Plate Voltage
1000 V
D-C Plate Voltage . . 1000 volts
D-C Grid Voltage
-150 V
D-C Grid Voltage ... —150 volts Maximum Ratings, Absolute Values
D-C Cathode Current ... mA D-C Plate Voltage*
600 V
D-C Cathode Current ... mA D-C Plate Voltage* .. 600 volts
D-C Grid Current§ mA D-C Grid Voltage L
-150 V
D-C Grid Current§ mA D-C Grid Voltage L —150 volts
Peak Positive R-F Grid-Cathode Voltage ................ volts D-C Cathode Cutrent
100 V
Peak Positive R-F Grid-Cathode Voltage ................ volts D-C Cathode Cutrent .. ... 100 mA
Peak Negative R-F Grid-Cathode Voltage .............. volts D-C Grid Current§ ... L
50 V
Peak Negative R-F Grid-Cathode Voltage .............. volts D-C Grid Current§ ... L 50 mA
Plate Dissipationt (Forced-air Cooling) watts Peak Positive R-F Grid Voltage
30 V
Plate Dissipationt (Forced-air Cooling) watts Peak Positive R-F Grid Voltage 30 volts
Grid Dissipation ... watts Peak Negative R-F Grid Voltage
-400 V
Grid Dissipation ... watts Peak Negative R-F Grid Voltage —400 volts
Plate Dissipationt (Forced-air Cooling)
70 W
Plate Dissipationt (Forced-air Cooling) 70 watts
Power Amplifier, Grid Separation Circuit ~—
500 MHz
Power Amplifier, Grid Separation Circuit ~— 500 Mc
D-C Plate Voltage
900 V
D-C Plate Voltage 900 volts
D-C Grid Voltage
-40 V
D-C Grid Voltage —40 volts
D-C Plate Current
90 mA
D-C Plate Current 90 mA
D-C Grid Current, Approximate
30 mA
D-C Grid Current, Approximate 30 mA
Useful Power Output
40 mA
Useful Power Output ... ... ... 40 watts Min. Max.
Filament Current at [1]
6 V
Filament Current at 6.0 volts 0.90 1.05 amps
Filament Current at [2]
0.9 V
Filament Current at 6.0 volts 0.90 1.05 amps
Filament Current at [3]
1.05 V
Filament Current at 6.0 volts 0.90 1.05 amps
D-C Plate Voltage [1]
900 V
D-C Plate Voltage 900 volts Grid-Plate Capacitance (Note 2) 1.86 2.16 upf
D-C Plate Voltage [2]
2 V
D-C Plate Voltage 900 volts Grid-Plate Capacitance (Note 2) 1.86 2.16 upf
D-C Plate Voltage [3]
1.86 V
D-C Plate Voltage 900 volts Grid-Plate Capacitance (Note 2) 1.86 2.16 upf
D-C Plate Voltage [4]
2.16 V
D-C Plate Voltage 900 volts Grid-Plate Capacitance (Note 2) 1.86 2.16 upf
D-C Grid Voltage, Approximate [1]
-22 V
D-C Grid Voltage, Approximate ......... —22 volts Grid-Cathode Capacitance (Note 2) 5.60 7.60 upf
D-C Grid Voltage, Approximate [2]
2 V
D-C Grid Voltage, Approximate ......... —22 volts Grid-Cathode Capacitance (Note 2) 5.60 7.60 upf
D-C Grid Voltage, Approximate [3]
5.6 V
D-C Grid Voltage, Approximate ......... —22 volts Grid-Cathode Capacitance (Note 2) 5.60 7.60 upf
D-C Grid Voltage, Approximate [4]
7.6 V
D-C Grid Voltage, Approximate ......... —22 volts Grid-Cathode Capacitance (Note 2) 5.60 7.60 upf
D-C Plate Current [1]
90 mA
D-C Plate Current . 90 mA Note 1 - Measured at 1 mA of plate current and a plate voltage
D-C Plate Current [2]
1 mA
D-C Plate Current . 90 mA Note 1 - Measured at 1 mA of plate current and a plate voltage
D-C Plate Current [3]
1 mA
D-C Plate Current . 90 mA Note 1 - Measured at 1 mA of plate current and a plate voltage
D-C Grid Current [1]
10 V
D-C Grid Current 10 mA of 600 volts.

Data set 04

1975 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater Current Range
900 mA to 1.05 A
Cathode Heating Time
60 s

Capacitance

Input Capacitance
6.3 pF
Output Capacitance
0.035 pF
Grid-Plate Capacitance
1.98 pF

Other

Frequency Maximum
3 GHz
Pulse Plate Voltage Maximum
3500 V
PlatePulsed
Pulse Current Maximum
4.8 A
PulseModulator
Pulse Duration Maximum
6 us
Duty Factor Maximum
0.0033
Grid-Pulsed Plate Voltage Maximum
1000 V
Plate-Pulsed Peak Plate Voltage Maximum
3500 V
Pulse Plate Current Maximum
3 A
Pulse Grid Current Maximum
1.8 A

Data set 05

1976 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater Current Range
900 mA to 1.05 A
Cathode Heating Time
60 s

Capacitance

Input Capacitance
6.3 pF
Output Capacitance
0.035 pF
Grid-Plate Capacitance
1.98 pF

Other

Frequency Maximum
3 GHz
Pulse Plate Voltage Maximum
3500 V
PlatePulsed
Pulse Current Maximum
4.8 A
PulseModulator
Pulse Duration Maximum
6 us
Duty Factor Maximum
0.0033
Grid-Pulsed Plate Voltage Maximum
1000 V
Plate-Pulsed Peak Plate Voltage Maximum
3500 V
Pulse Plate Current Maximum
3 A
Pulse Grid Current Maximum
1.8 A