Power - Triode ·Triode
Ceramic-metal UHF transmitting triode for continuous-wave amplifier, oscillator, and pulsed microwave service. Manufacturer data specifies useful CW operation to about 2.5 GHz and pulse applications to roughly 3 GHz, with 100 W plate dissipation.
The Eimac 2C39B is a ceramic-and-metal UHF transmitting triode useful as a CW amplifier or oscillator to 2500 MHz and in pulse applications to 3000 MHz; it is a unilateral replacement for the 2C39A.
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
1 physical section, each with unique specifications.
Section 1
Promoted values are taken from the printed ratings on the uploaded source; additional non-promoted values are retained in TUBE_SECTION_PARAMETER.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Heating Time
60 s
Frequency for Maximum Ratings
2500 MHz
Pulse Application Frequency
3000 MHz
Grid-Plate Capacitance
2.01 pF
Grid-Cathode Capacitance
6.6 pF
Plate-Cathode Capacitance
0.035 pF
Useful Power Output
27 W
CW amplifier; 500MHz
Data set 02
Published operating points and test conditions from this source.
The Eimoc [1]
2 W
The Eimoc 2C39B is a ceramic-and-metal UHF transmitting triode with a plate dissipation rating
The Eimoc [2]
9 W
The Eimoc 2C39B is a ceramic-and-metal UHF transmitting triode with a plate dissipation rating
of loo watts. It is useful as a CW amplifie. or oscillator ot frequencies up to
2500 MHz
of loo watts. It is useful as a CW amplifie. or oscillator ot frequencies up to 2500 mc., and in pulse
Transconductonce (Plate Current
70 A
Transconductonce (Plate Current 70mo.) -
MAxlMUM ENVELopE TEMPERATURE = [1]
25
MAxlMUM ENVELopE TEMPERATURE = 25oo€. 2oooc.
MAxlMUM ENVELopE TEMPERATURE = [2]
2
MAxlMUM ENVELopE TEMPERATURE = 25oo€. 2oooc.
D-C PLATE VOLTAGE
1000 V
D-C PLATE VOLTAGE - - - - 1000 MAX. VOLTS D-C Grid cui.ent - -
D-C CATHODE CuRRENT
125 mA
D-C CATHODE CuRRENT - - - 125 MAX. MA
D-C GRID VOLTAGE - - - .--t5 [1]
0 V
D-C GRID VOLTAGE - - - .--t50 MAX. VOL.TS 3:jev,iud,gp:ow::ro`#ppu',OXJ,-
D-C GRID VOLTAGE - - - .--t5 [2]
3 V
D-C GRID VOLTAGE - - - .--t50 MAX. VOL.TS 3:jev,iud,gp:ow::ro`#ppu',OXJ,-
D-c GRID cunRENT - - - •
50
D-c GRID cunRENT - - - • - 50 MAX. MA
GRID VOLTAGE ---- •
30 V
GRID VOLTAGE ---- • - 30 MAX. VOLTS
GRID DISSIPATION ---,"-- •
2 W
GRID DISSIPATION ---,"-- • - 2 MAX. WATTS Useful power output -
D-C plate voltage
600 V
D-C plate voltage ----- 600 yol,s
D-C PLATE VOLTAGE
600 V
D-C PLATE VOLTAGE 600 MAX. VOLTS
D-C GRID VOLTAGE [1]
-150 V
D-C GRID VOLTAGE -150 MAX. VOLTS D-C Grid voltage ----- -16 yolts
D-C GRID VOLTAGE [2]
-16 V
D-C GRID VOLTAGE -150 MAX. VOLTS D-C Grid voltage ----- -16 yolts
D-C GRID CuRRENT
50 mA
D-C GRID CuRRENT 50 MAX. MA
GRID VOLTAG
30
GRID VOLTAG - - 30 MAX. VOLTS D-C Grid currenl .-----
GRID VOLT
400 W
GRID VOLT - - 400 MAX. VOLTS Driving power (appTox.)I ---
GRID DISSIP [1]
2 W
GRID DISSIP - - 2 MAX. WATTS Useful carrier power output --- '8 wo,,s
GRID DISSIP [2]
8 W
GRID DISSIP - - 2 MAX. WATTS Useful carrier power output --- '8 wo,,s
exceed
1200 V
exceed 1200 volts. higher d-C Plate voltage mcly be used if the sum of the peak positive modulating voltage and the d-c plate voltage
Moun(ing-The [1]
2 V
Moun(ing-The 2C39B may be operated in any Heat'er Voltage-The maximum rated heater vol-
Moun(ing-The [2]
9 V
Moun(ing-The 2C39B may be operated in any Heat'er Voltage-The maximum rated heater vol-
and in cases of extremely heavy vibrcition or shock peak cathode currents in excess of
3 A
and in cases of extremely heavy vibrcition or shock peak cathode currents in excess of 3.0 omperes.
less than
3
less than 3.0 amperes peak ccithode emission, the
heater voltage can be reduced to
5.6 V
heater voltage can be reduced to 5.6 volts, to pro-
reference points, nor should clamping forces be clp- ±
5 V
reference points, nor should clamping forces be clp- ± 5% of I.he selected operating voltage to main-
ceramic-to-metcll seals used in the [1]
2
ceramic-to-metcll seals used in the 2C39B is 200°C., where the circuit performance starts to deteriorate
ceramic-to-metcll seals used in the [2]
9
ceramic-to-metcll seals used in the 2C39B is 200°C., where the circuit performance starts to deteriorate
ceramic-to-metcll seals used in the [3]
200
ceramic-to-metcll seals used in the 2C39B is 200°C., where the circuit performance starts to deteriorate
peratures below I.he maximum rated value. voltage, but not less thcln
4.5 V
peratures below I.he maximum rated value. voltage, but not less thcln 4.5 volts. In cases where
sipclte loo watts at sea level, with the air at
25
sipclte loo watts at sea level, with the air at 25°C, st.arts, clft.er which the heater voltcige can be re-
is
12.5 V
is 12.5 cubic feet per minute. duced to the selected operating voltage.
The air flow-rcite should be increased at high
800
The air flow-rcite should be increased at high 800 volts. Grid-leak resistors should be mode vciri-
rates in cubic feet per minute at
35000 A
rates in cubic feet per minute at 35,000 feet alti- plate current to the correct values under changing
I. Tt€ TRUE iNDlcATEo F`uNouT oF TIE ANODE CONTACT D [1]
736
I. Tt€ TRUE iNDlcATEo F`uNouT oF TIE ANODE CONTACT D .736 .826
I. Tt€ TRUE iNDlcATEo F`uNouT oF TIE ANODE CONTACT D [2]
826
I. Tt€ TRUE iNDlcATEo F`uNouT oF TIE ANODE CONTACT D .736 .826
TO THE` CATHODE CONTACT SuflFACE SHALL NOT EXCEED [1]
20
TO THE` CATHODE CONTACT SuflFACE SHALL NOT EXCEED .020. F .086
TO THE` CATHODE CONTACT SuflFACE SHALL NOT EXCEED [2]
86
TO THE` CATHODE CONTACT SuflFACE SHALL NOT EXCEED .020. F .086
Data set 03
Published operating points and test conditions from this source.
HeaterOrFilamentVoltageNominal
6.3 V
HeaterOrFilamentCurrentNominal
1.03 A
MaxPlateVoltage
600 V
MaxPlateDissipation
100 W
MaxCathodeCurrent
200 mA