Voltage - Triode (single) ·Triode
Compact rugged high-mu planar triode for continuous or pulsed oscillator, amplifier, and frequency-multiplier service through approximately 6 GHz.
The EIMAC 8912 is a compact rugged high-mu planar triode for cw or pulsed oscillator, amplifier, and frequency-multiplier service to 6 ghz.
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 printed General Characteristics / Maximum Ratings. Additional published conditions and operating data are preserved in parameters.
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.
Grid-Cathode Capacitance
5 pF
Grid-Plate Capacitance
1.5 pF
Plate-Cathode Capacitance
0.06 pF
Cathode Heating Time
60 s
Peak Plate Voltage
2500 V
DC Plate Current
100 mA
Peak Plate Current
3 A
Duty=.0025
Peak Plate Current
1.5 A
Duty=.01
Frequency
6 GHz
Data set 02
Published operating points and test conditions from this source.
viding in excess of [1]
1 GHz
viding in excess of 1 kw peak power at 6 GHz.
viding in excess of [2]
6 GHz
viding in excess of 1 kw peak power at 6 GHz.
Heater: Voltage [1]
6.3 V
Heater: Voltage ......................... 6.3 ± 5%
Heater: Voltage [2]
5 V
Heater: Voltage ......................... 6.3 ± 5%
Current, at [1]
6.3 A
Current, at 6.3 volts ................ 0.65
Current, at [2]
650 mA
Current, at 6.3 volts ................ 0.65
Cathode Heating Time
60
Cathode Heating Time ............... 60 sec.
Transconductance (Average)
30
Transconductance (Average) .................. 30 mmhos
Plate Dissipation (maximum)
2 W
Plate Dissipation (maximum)2 ...................................
Published value
2
2. With forced air cooling or appropriate conduction and/or convection coollng.
Ceramic/Metal Seals
250
Ceramic/Metal Seals ..... ............. 250OC
RF OSCILLATOR DC GPllD VOLTAGE
-100 V
RF OSCILLATOR DC GPllD VOLTAGE ............ -100 vdc
PULSE DUBATlo N1
3
PULSE DUBATlo N1 ........... 3.0 HS
PEAK HEATER-CATHODE VOLTAGE2 . ±
50 V
PEAK HEATER-CATHODE VOLTAGE2 . ±50v
DC PLATE VOLTAGE [1]
2 GHz
DC PLATE VOLTAGE ...... .... 2.0 kvdc FREQUENCY . 6.0 GHz
DC PLATE VOLTAGE [2]
6 GHz
DC PLATE VOLTAGE ...... .... 2.0 kvdc FREQUENCY . 6.0 GHz
PEAK PLATE VOLTAGE
2.5 kV
PEAK PLATE VOLTAGE ..... .... 2.5 kv
DC PLATE CURPENT [1]
100
DC PLATE CURPENT ...... .... 100 mAdc 1. For applications requinng longer pulse duration
DC PLATE CURPENT [2]
1
DC PLATE CURPENT ...... .... 100 mAdc 1. For applications requinng longer pulse duration
PEAK PLATE CUBF}ENT ., [1]
3
PEAK PLATE CUBF}ENT .,... 3.0 a at .0025 DUTY Product Manager, EIMAC-Division of Varian, Salt
PEAK PLATE CUBF}ENT ., [2]
25
PEAK PLATE CUBF}ENT .,... 3.0 a at .0025 DUTY Product Manager, EIMAC-Division of Varian, Salt
PEAK GRID CURRENT [1]
1.2 A
PEAK GRID CURRENT ..... 1.2 a at .0025 DUTY
PEAK GRID CURRENT [2]
25 A
PEAK GRID CURRENT ..... 1.2 a at .0025 DUTY
Published value [1]
0.7
0.7 a at .01 DUTY 2. The heater is electrically isolated from the cathode.
Published value [2]
1
0.7 a at .01 DUTY 2. The heater is electrically isolated from the cathode.
Published value [3]
2
0.7 a at .01 DUTY 2. The heater is electrically isolated from the cathode.
Data set 03
Published operating points and test conditions from this source.
Heater voltage nominal
6.3 V
Heater current nominal
650 mA
Transconductance
30000 uS
Amplification factor
85
Input/grid-cathode capacitance
5 pF
Output/plate-cathode capacitance
1.5 pF
Grid-plate/feedback capacitance
0.06 pF
Maximum plate voltage
2500 V
Maximum plate dissipation
50 W
Maximum grid dissipation
1.5 W
Maximum cathode or pulse plate current
3 A
Maximum rated frequency
6 GHz
DC plate voltage
2000 V
ClassC;Pulsed
Peak plate voltage
2500 V
ClassC;Pulsed
DC plate current
100 mA
DC grid current
30 mA
Peak plate current at 0.0025 duty
3 A
Peak plate current at 0.01 duty
1.5 A
Peak grid current at 0.0025 duty
1.2 A
Peak grid current at 0.01 duty
700 mA
DC grid voltage
-100 V
Pulse duration
3 us
Duty factor
0.01
Data set 04
Published operating points and test conditions from this source.
Heater voltage nominal
6.3 V
Heater current nominal
650 mA
Transconductance
30000 uS
Amplification factor
85
Input/grid-cathode capacitance
5 pF
Output/plate-cathode capacitance
1.5 pF
Grid-plate/feedback capacitance
0.06 pF
Maximum plate voltage
2500 V
Maximum plate dissipation
50 W
Maximum grid dissipation
1.5 W
Maximum cathode or pulse plate current
3 A
Maximum rated frequency
6 GHz
DC plate voltage
2000 V
ClassC;Pulsed
Peak plate voltage
2500 V
ClassC;Pulsed
DC plate current
100 mA
DC grid current
30 mA
Peak plate current at 0.0025 duty
3 A
Peak plate current at 0.01 duty
1.5 A
Peak grid current at 0.0025 duty
1.2 A
Peak grid current at 0.01 duty
700 mA
DC grid voltage
-100 V
Pulse duration
3 us
Duty factor
0.01