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2C39A

High-mu ceramic-metal UHF transmitting triode for amplification, oscillation, and pulse service into the microwave region. Approximately 100 W plate dissipation and high transconductance support useful RF power at frequencies extending into the gigahertz range.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: SPECIAL4
Base pins: -
Nominal heater: 6.3 V / 1 A

Description

The RCA 2C39A is a forced-air-cooled uhf power triode. The supplied source provides transmitting, RF, or rectifier ratings appropriate to this device.

Socket description

Special 4-contact transmitting-tube base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: SPECIAL4
Base pins: -
Nominal heater voltage: 6.3 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

1950 Eimac Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater Cu rrent
1
Heater Cu rrent 1.0 amperes
Grid -Cathode
6.5
Grid -Cathode 6.50
Pla te- Cathode [1]
0
Pla te- Cathode 0 .035
Pla te- Cathode [2]
35
Pla te- Cathode 0 .035
MAXIM UM RATIN G S D-C Plate Voltage
900 V
MAXIM UM RATIN G S D-C Plate Voltage - 900 Volts
D-C Cathode Cu rr ent
90
D-C Cathode Cu rr ent 90 Ma.
D-C PLATE VOLTAG E [1]
1000
D-C PLATE VOLTAG E - 1000 VO LTS - 22 Volts
D-C PLATE VOLTAG E [2]
22
D-C PLATE VOLTAG E - 1000 VO LTS - 22 Volts
D-C GRID VOLTAGE [1]
-150 V
D-C GRID VOLTAGE - -150 VOLTS 12 Wat ts
D-C GRID VOLTAGE [2]
12 V
D-C GRID VOLTAGE - -150 VOLTS 12 Wat ts
PEAK NEG ATIVE R-F G RID VOLTAGE
400 V
PEAK NEG ATIVE R-F G RID VOLTAGE - 400 VOLTS
PLATE DISSIPATIO N '
100
PLATE DISSIPATIO N ' 100 WATTS
D-C Plate Volta ge
800
D-C Plate Volta ge - 800 Volts ra dio fre qu e ncy rate . Usually suc h actio n

Data set 02

1956 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Maximum Plate/Inverse Voltage
600 V
Source rating
Maximum Plate Dissipation
100 W

Characteristics

Maximum Full-Input Frequency
2500 MHz
Transconductance
22000 uS

Data set 03

1958 Amperex Industrial

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate voltage
800 V
RFAmplifierOrOscillator; ClassC; Telegraphy
Plate current
90 mA
RFAmplifierOrOscillator; ClassC; Telegraphy
Grid voltage
-40 V
RFAmplifierOrOscillator; ClassC; Telegraphy
Grid current
30 mA
RFAmplifierOrOscillator; ClassC; Telegraphy
Maximum frequency at full input rating
2500 MHz

Capacitance

Grid-to-plate capacitance
2 pF
Grid-to-cathode capacitance
6.6 pF
Plate-to-cathode capacitance
0.035 pF

Data set 04

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 05

1963 Siemens

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater voltage
6.3 V
Heater current
1.025 A

Data set 06

1965 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

The Eimac [1]
2
The Eimac 2C39A is a ceramic-metal high-mu planai. triode with a plate-
The Eimac [2]
9
The Eimac 2C39A is a ceramic-metal high-mu planai. triode with a plate-
frequency multiplier at frequencies to above
2500 MHz
frequency multiplier at frequencies to above 2500 megacycles. The new ceramic-metal
at seal temperatures up to
250
at seal temperatures up to 250°C, and longer life expectancy than its glass pi.ototypes.
deliver [1]
27 W
deliver 27 watts useful power output with 6 watts driving powei.. As an r-f oscillator
deliver [2]
6 W
deliver 27 watts useful power output with 6 watts driving powei.. As an r-f oscillator
at [1]
2500 MHz
at 2500 megacycles the 2C39A will deliver a minimum of 12 watts useful power output.
at [2]
2 MHz
at 2500 megacycles the 2C39A will deliver a minimum of 12 watts useful power output.
at [3]
9 MHz
at 2500 megacycles the 2C39A will deliver a minimum of 12 watts useful power output.
at [4]
12 MHz
at 2500 megacycles the 2C39A will deliver a minimum of 12 watts useful power output.
Heater: Jot:::neg(T!:eeHipp|i-ca+io;sn)
6.3
Heater: Jot:::neg(T!:eeHipp|i-ca+io;sn) : : : : : - - 6.3 yol's
Current [1]
-950 mA
Current--------- -0.95 I.10 amperes
Current [2]
10 A
Current--------- -0.95 I.10 amperes

Data set 07

1971 Machlette Laboratories

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

frequency multiplier, or power amplifier in radio trans- is forced-air cooled and is capable of dissipating
100 W
frequency multiplier, or power amplifier in radio trans- is forced-air cooled and is capable of dissipating 100 watts.
mitting service from low frequency to above
2500 MHz
mitting service from low frequency to above 2500 Mc.
Heater Voltage
6.3 V
Heater Voltage ... ............................ 6.3 Voltst
Heater Current ac [1]
6.3 V
Heater Current ac 6.3 Volts ... ..... 1.0 Amps
Heater Current ac [2]
1 V
Heater Current ac 6.3 Volts ... ..... 1.0 Amps
Heater Heating Time, minimum (Before Applying Plate Voltage)
60 s
Heater Heating Time, minimum (Before Applying Plate Voltage) ... 60 Seconds
Amplification Factor
100
Amplification Factor ... ... 100
Maximum Incoming Air Temperature
45 mA
Maximum Incoming Air Temperature .... 45 °C
Maximum Anode Temperature ... e
175 mA
Maximum Anode Temperature ... e 175 °C
D-C Plate Voltage . T
1000 V
D-C Plate Voltage . T . 1000 wvolts
D-C Grid Voltage
150 V
D-C Grid Voltage ... 150 volts Maximum Ratings, Absolute Values
D-C Cathode Current . L [1]
125 V
D-C Cathode Current . L 125 mA D-C Plate Voltage* . ... .. ... 600 volts
D-C Cathode Current . L [2]
600 V
D-C Cathode Current . L 125 mA D-C Plate Voltage* . ... .. ... 600 volts

Data set 08

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

Data set 09

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

Data set 10

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Cathode current Ix = max
125 mA
Cathode current Ix = max. 125 mA
Anode voltage V, = max
1000 V
Anode voltage V, = max. 1000 V
Anode dissipation W, = max
100 W
Anode dissipation W, = max. 100 W
Grid dissipation Wy = max
2 W
Grid dissipation Wy = max. 2 W

Characteristic

Mutual conductance S
25 mA
Mutual conductance S = 25 mA/V
Output power Wy
18 W
Output power Wy = 18 W
Heater voltage Vi
6.3 V
Heater voltage Vi = 6.3 V
Heater current Ir = 0.95tol
1 A
Heater current Ir = 0.95tol.1 A
For pulsed operation,
6.3 V
. For pulsed operation, 6.3 V is normally required for preheating. For C.W.
Anode to grid Cag > 1.86 <
2.16 pF
Anode to grid Cag > 1.86 < 2.16 pF
Anode to cathode Cak <
0.035 pF
Anode to cathode Cak < 0.035 pF
Grid to cathode Cgk > 5.6 <
7.6 pF
Grid to cathode Cgk > 5.6 < 7.6 pF