Power - Triode ·Triode
Water-cooled Eimac medium-mu power triode for amplifier, oscillator, modulator, and RF power service.
The Eimac 8242/3CW5000A3 is a medium-mu water-cooled power triode for amplifier, oscillator, modulator, and RF power service.
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 from printed general-characteristics and maximum-ratings blocks.
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.
Amplification factor
20
Transconductance
20000 uS
Maximum DC plate voltage
6000 V
Maximum plate dissipation
5000 W
Representative maximum-signal plate current
2.5 A
Data set 02
Published operating points and test conditions from this source.
Heater/filament voltage
7.5 V
Heater/filament current
51.5 A
Amplification factor
20
Transconductance
20000 uS
Input/grid-cathode capacitance
35 pF
Output/plate-cathode capacitance
0.9 pF
Feedback/grid-plate capacitance
20 pF
Maximum plate voltage
6000 V
Maximum plate dissipation
5000 W
Maximum grid dissipation
150 W
Maximum plate/cathode current
2.5 A
Frequency for maximum ratings
75 MHz
Typical RF plate voltage
4000 V
ClassC
Typical RF output power
7500 W
ClassC
Typical RF output power
10000 W
PlateVoltage=5000-6000V
Data set 03
Published operating points and test conditions from this source.
Amplification factor
22
Transconductance
20000 uS
Heater/filament voltage
7.5 V
Heater/filament current
50 A
Maximum plate voltage
6000 V
Maximum plate dissipation
5000 W
Maximum grid dissipation
150 W
Maximum cathode/plate current
3.2 A
Frequency for maximum ratings
110 MHz
Typical RF plate voltage
6000 V
ClassC
Typical AF max-signal plate current
3 A
ClassB
Input/grid-filament capacitance
35 to 35 pF
Output/plate-filament capacitance
0.9 to 0.9 pF
Feedback/grid-plate capacitance
20 to 20 pF
Cooling
Water and forced air
Data set 04
Published operating points and test conditions from this source.
Amplification factor
22
Transconductance
20000 uS
Heater/filament voltage
7.5 V
Heater/filament current
50 A
Maximum plate voltage
6000 V
Maximum plate dissipation
5000 W
Maximum grid dissipation
150 W
Maximum cathode/plate current
3.2 A
Frequency for maximum ratings
110 MHz
Typical RF plate voltage
6000 V
ClassC
Typical AF max-signal plate current
3 A
ClassB
Input/grid-filament capacitance
35 to 35 pF
Output/plate-filament capacitance
0.9 to 0.9 pF
Feedback/grid-plate capacitance
20 to 20 pF
Cooling
Water and forced air