Data set 01
1938 Raytheon
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Other
Maximum Frequency
500 MHz
RFPowerOutput
370 W
ClassC;Plate 2000 V
Power Output
800 W
ClassAB;PushPull;TwoTubes
Power - Tetrode (NOT beam) (over 1000V 100W) ·Tetrode
4CX300A
Compact ceramic-metal RF power tetrode for oscillator, linear-amplifier, and Class C service to approximately 500 MHz.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 6 V / 2.75 A
Description
Metal-ceramic RF power tetrode for oscillator, linear-amplifier and Class C service to about 500 MHz; also designated 4CX300A.
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 V
- Nominal heater current
- 2.75 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
Tetrode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.012 S
- Amplification factor
- 50
- Max plate voltage
- 2000 V
- Max screen voltage
- 400 V
- Max plate dissipation
- 300 W
- Max screen dissipation
- 12 W
- Max grid dissipation
- 2 W
Published absolute maximum ratings promoted from the applicable service tables; pulse-service maxima are used only where explicitly noted in the tube note.
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 02
1962 Eimac
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Other
power tetrode having a maximum plate-dissipation rating of
300 W
power tetrode having a maximum plate-dissipation rating of 300 watts. The
Heating Time [1]
30
Heating Time - - - 30 60 S
Heating Time [2]
60
Heating Time - - - 30 60 S
Heater: Voltage (See “Application”)
6
Heater: Voltage (See “Application”) - 6.0 \Y
Current (E= [1]
6 V
Current (E=6.0 volts) - - - 2.6 3.1 A
Current (E= [2]
2.6 V
Current (E=6.0 volts) - - - 2.6 3.1 A
Current (E= [3]
3.1 V
Current (E=6.0 volts) - - - 2.6 3.1 A
Amplification Factor (Grid to Screen) [1]
4
Amplification Factor (Grid to Screen) - 4.0 5.6
Amplification Factor (Grid to Screen) [2]
5.6
Amplification Factor (Grid to Screen) - 4.0 5.6
Transconductance (I,= [1]
200 mA
Transconductance (I,=200 ma.) - - 12,000 pmhos
Transconductance (I,= [2]
12000 mA
Transconductance (I,=200 ma.) - - 12,000 pmhos
Input [1]
925 pF
Input - - - - - - - 925 33 pF
Input [2]
33 pF
Input - - - - - - - 925 33 pF
Output [1]
35 pF
Output - - - - - - - 35 4.5 pF
Output [2]
4.5 pF
Output - - - - - - - 35 4.5 pF
Input T L
16.2 pF
Input T L 16.2 pF
Output [1]
3.5 pF
Output - - - - - - - - - - - - - 3.5 4.5 pF
Output [2]
4.5 pF
Output - - - - - - - - - - - - - 3.5 4.5 pF
Frequency for Maximum Ratings S L T
500 MHz
Frequency for Maximum Ratings S L T 500 MHz
AMPLIFI (o) DC Plate Voltage [1]
500 V
AMPLIFI (o) DC Plate Voltage - - 500 1000 1500 2000 2500t 2000 volts
AMPLIFI (o) DC Plate Voltage [2]
1000 V
AMPLIFI (o) DC Plate Voltage - - 500 1000 1500 2000 2500t 2000 volts
AMPLIFI (o) DC Plate Voltage [3]
1500 V
AMPLIFI (o) DC Plate Voltage - - 500 1000 1500 2000 2500t 2000 volts
AMPLIFI (o) DC Plate Voltage [4]
2000 V
AMPLIFI (o) DC Plate Voltage - - 500 1000 1500 2000 2500t 2000 volts
AMPLIFI (o) DC Plate Voltage [5]
2500 V
AMPLIFI (o) DC Plate Voltage - - 500 1000 1500 2000 2500t 2000 volts
AMPLIFI (o) DC Plate Voltage [6]
2000 V
AMPLIFI (o) DC Plate Voltage - - 500 1000 1500 2000 2500t 2000 volts
CIass-CITefeR rao': orSFfAILTLeIAeT?o': DC Screen Voltage [1]
250 V
CIass-CITefeR rao': orSFfAILTLeIAeT?o': DC Screen Voltage 250 250 250 250 250 250 volts
CIass-CITefeR rao': orSFfAILTLeIAeT?o': DC Screen Voltage [2]
250 V
CIass-CITefeR rao': orSFfAILTLeIAeT?o': DC Screen Voltage 250 250 250 250 250 250 volts
CIass-CITefeR rao': orSFfAILTLeIAeT?o': DC Screen Voltage [3]
250 V
CIass-CITefeR rao': orSFfAILTLeIAeT?o': DC Screen Voltage 250 250 250 250 250 250 volts
CIass-CITefeR rao': orSFfAILTLeIAeT?o': DC Screen Voltage [4]
250 V
CIass-CITefeR rao': orSFfAILTLeIAeT?o': DC Screen Voltage 250 250 250 250 250 250 volts
CIass-CITefeR rao': orSFfAILTLeIAeT?o': DC Screen Voltage [5]
250 V
CIass-CITefeR rao': orSFfAILTLeIAeT?o': DC Screen Voltage 250 250 250 250 250 250 volts
CIass-CITefeR rao': orSFfAILTLeIAeT?o': DC Screen Voltage [6]
250 V
CIass-CITefeR rao': orSFfAILTLeIAeT?o': DC Screen Voltage 250 250 250 250 250 250 volts
b4 DC Plate Current [1]
250 mA
b4 DC Plate Current - - 250 250 250 250 250 250 ma
b4 DC Plate Current [2]
250 mA
b4 DC Plate Current - - 250 250 250 250 250 250 ma
b4 DC Plate Current [3]
250 mA
b4 DC Plate Current - - 250 250 250 250 250 250 ma
b4 DC Plate Current [4]
250 mA
b4 DC Plate Current - - 250 250 250 250 250 250 ma
b4 DC Plate Current [5]
250 mA
b4 DC Plate Current - - 250 250 250 250 250 250 ma
b4 DC Plate Current [6]
250 mA
b4 DC Plate Current - - 250 250 250 250 250 250 ma
MAXIMUM RATINGS DC Sé:rec?nCCurrent* - gg g? [1]
2 mA
MAXIMUM RATINGS DC Sé:rec?nCCurrent* - gg g? 2; ;9 16 10t ma
MAXIMUM RATINGS DC Sé:rec?nCCurrent* - gg g? [2]
9 mA
MAXIMUM RATINGS DC Sé:rec?nCCurrent* - gg g? 2; ;9 16 10t ma
MAXIMUM RATINGS DC Sé:rec?nCCurrent* - gg g? [3]
16 mA
MAXIMUM RATINGS DC Sé:rec?nCCurrent* - gg g? 2; ;9 16 10t ma
MAXIMUM RATINGS DC Sé:rec?nCCurrent* - gg g? [4]
10 mA
MAXIMUM RATINGS DC Sé:rec?nCCurrent* - gg g? 2; ;9 16 10t ma
DC PLATE VOLTAGE [1]
2000 V
DC PLATE VOLTAGE - - 2000 VOLTS DC Grid Current* . 2 6 25 25t ma
DC PLATE VOLTAGE [2]
2 V
DC PLATE VOLTAGE - - 2000 VOLTS DC Grid Current* . 2 6 25 25t ma
DC PLATE VOLTAGE [3]
6 V
DC PLATE VOLTAGE - - 2000 VOLTS DC Grid Current* . 2 6 25 25t ma
DC PLATE VOLTAGE [4]
25 V
DC PLATE VOLTAGE - - 2000 VOLTS DC Grid Current* . 2 6 25 25t ma
DC PLATE VOLTAGE [5]
25 V
DC PLATE VOLTAGE - - 2000 VOLTS DC Grid Current* . 2 6 25 25t ma
DC SCREEN VOLTAGE [1]
300 V
DC SCREEN VOLTAGE - - 300 VOLTS Peak RF Grid Voltage* - 114 114 112 112 111 — volts
DC SCREEN VOLTAGE [2]
114 V
DC SCREEN VOLTAGE - - 300 VOLTS Peak RF Grid Voltage* - 114 114 112 112 111 — volts
DC SCREEN VOLTAGE [3]
114 V
DC SCREEN VOLTAGE - - 300 VOLTS Peak RF Grid Voltage* - 114 114 112 112 111 — volts
DC SCREEN VOLTAGE [4]
112 V
DC SCREEN VOLTAGE - - 300 VOLTS Peak RF Grid Voltage* - 114 114 112 112 111 — volts
DC SCREEN VOLTAGE [5]
112 V
DC SCREEN VOLTAGE - - 300 VOLTS Peak RF Grid Voltage* - 114 114 112 112 111 — volts
DC SCREEN VOLTAGE [6]
111 V
DC SCREEN VOLTAGE - - 300 VOLTS Peak RF Grid Voltage* - 114 114 112 112 111 — volts
Driving Power* [1]
40 W
Driving Power* - - 40 35 32 29 28 — watts
Driving Power* [2]
35 W
Driving Power* - - 40 35 32 29 28 — watts
Driving Power* [3]
32 W
Driving Power* - - 40 35 32 29 28 — watts
Driving Power* [4]
29 W
Driving Power* - - 40 35 32 29 28 — watts
Driving Power* [5]
28 W
Driving Power* - - 40 35 32 29 28 — watts
DC GRID VOLTAGE [1]
-250 V
DC GRID VOLTAGE - - —250 VOLTS Plate Input Power - 125 250 375 500 625 500 watts
DC GRID VOLTAGE [2]
125 V
DC GRID VOLTAGE - - —250 VOLTS Plate Input Power - 125 250 375 500 625 500 watts
DC GRID VOLTAGE [3]
250 V
DC GRID VOLTAGE - - —250 VOLTS Plate Input Power - 125 250 375 500 625 500 watts
DC GRID VOLTAGE [4]
375 V
DC GRID VOLTAGE - - —250 VOLTS Plate Input Power - 125 250 375 500 625 500 watts
DC GRID VOLTAGE [5]
500 V
DC GRID VOLTAGE - - —250 VOLTS Plate Input Power - 125 250 375 500 625 500 watts
DC GRID VOLTAGE [6]
625 V
DC GRID VOLTAGE - - —250 VOLTS Plate Input Power - 125 250 375 500 625 500 watts
DC GRID VOLTAGE [7]
500 V
DC GRID VOLTAGE - - —250 VOLTS Plate Input Power - 125 250 375 500 625 500 watts
DC PLATE CURRENT [1]
250 mA
DC PLATE CURRENT - - 250 MA Plate Output Power - 70 190 280 390 500 225! watts
DC PLATE CURRENT [2]
70 mA
DC PLATE CURRENT - - 250 MA Plate Output Power - 70 190 280 390 500 225! watts
DC PLATE CURRENT [3]
190 mA
DC PLATE CURRENT - - 250 MA Plate Output Power - 70 190 280 390 500 225! watts
DC PLATE CURRENT [4]
280 mA
DC PLATE CURRENT - - 250 MA Plate Output Power - 70 190 280 390 500 225! watts
DC PLATE CURRENT [5]
390 mA
DC PLATE CURRENT - - 250 MA Plate Output Power - 70 190 280 390 500 225! watts
DC PLATE CURRENT [6]
500 mA
DC PLATE CURRENT - - 250 MA Plate Output Power - 70 190 280 390 500 225! watts
DC PLATE CURRENT [7]
225 mA
DC PLATE CURRENT - - 250 MA Plate Output Power - 70 190 280 390 500 225! watts
PLATE DISSIPATION [1]
300 V
PLATE DISSIPATION - - 300 WATTS Heater Voltage - - . 5.0 volts
PLATE DISSIPATION [2]
5 V
PLATE DISSIPATION - - 300 WATTS Heater Voltage - - . 5.0 volts
SCREEN DISSIPATION
12 W
SCREEN DISSIPATION - - 12 WATTS +Approximate values . . S
GRID DISSIPATION
2 W
GRID DISSIPATION - - - 2 WATTS For operation
DC Plate Voltage [1]
1000 V
DC Plate Voltage - - - - - 1000 1500 2000 2500 volts
DC Plate Voltage [2]
1500 V
DC Plate Voltage - - - - - 1000 1500 2000 2500 volts
DC Plate Voltage [3]
2000 V
DC Plate Voltage - - - - - 1000 1500 2000 2500 volts
DC Plate Voltage [4]
2500 V
DC Plate Voltage - - - - - 1000 1500 2000 2500 volts
MODULATOR DC Screen Voltage [1]
350
MODULATOR DC Screen Voltage - - - - 350 350 350 350volts
MODULATOR DC Screen Voltage [2]
350
MODULATOR DC Screen Voltage - - - - 350 350 350 350volts
MODULATOR DC Screen Voltage [3]
350
MODULATOR DC Screen Voltage - - - - 350 350 350 350volts
MODULATOR DC Screen Voltage [4]
350
MODULATOR DC Screen Voltage - - - - 350 350 350 350volts
Class-AB; DC Grid Voltagel [1]
55
Class-AB; DC Grid Voltagel - - - .- . 55 _55 55 —55volts
Class-AB; DC Grid Voltagel [2]
55
Class-AB; DC Grid Voltagel - - - .- . 55 _55 55 —55volts
Class-AB; DC Grid Voltagel [3]
55
Class-AB; DC Grid Voltagel - - - .- . 55 _55 55 —55volts
Class-AB; DC Grid Voltagel [4]
-55
Class-AB; DC Grid Voltagel - - - .- . 55 _55 55 —55volts
Zero-Signal DC Plate Current [1]
200 mA
Zero-Signal DC Plate Current - - 200 200 200 200 ma
Zero-Signal DC Plate Current [2]
200 mA
Zero-Signal DC Plate Current - - 200 200 200 200 ma
Zero-Signal DC Plate Current [3]
200 mA
Zero-Signal DC Plate Current - - 200 200 200 200 ma
Zero-Signal DC Plate Current [4]
200 mA
Zero-Signal DC Plate Current - - 200 200 200 200 ma
DC PLATE VOLTAGE [1]
2500 V
DC PLATE VOLTAGE - - 2500 VOLTS Effective Load, Plate to Plate - - 3500 6200 9500 11,600 ohms
DC PLATE VOLTAGE [2]
3500 V
DC PLATE VOLTAGE - - 2500 VOLTS Effective Load, Plate to Plate - - 3500 6200 9500 11,600 ohms
DC PLATE VOLTAGE [3]
6200 V
DC PLATE VOLTAGE - - 2500 VOLTS Effective Load, Plate to Plate - - 3500 6200 9500 11,600 ohms
DC PLATE VOLTAGE [4]
9500 V
DC PLATE VOLTAGE - - 2500 VOLTS Effective Load, Plate to Plate - - 3500 6200 9500 11,600 ohms
DC PLATE VOLTAGE [5]
11600 V
DC PLATE VOLTAGE - - 2500 VOLTS Effective Load, Plate to Plate - - 3500 6200 9500 11,600 ohms
DC SCREEN VOLTAGE
400 V
DC SCREEN VOLTAGE - - 400 VOLTS Peak AF Grid Input Voltage