Power - Triode Single (under 10W) ·Triode
Ruggedized high-mu ceramic-metal planar triode for grid-pulsed, plate-pulsed, or CW oscillator, amplifier, multiplier, modulator, and regulator service to approximately 3 GHz.
Stamford, Conn. 06907 « Tel. 203-348-7511 « TWX 203-327-2496 The ML-8906, ML-8907 and ML-8906/AL are ruggedized, coating impregnated in a nickel matrix. This construction, high-mu planar triodes of ceramic-and-metal construction in combination with proper plate series impedance, reduces designed for use as grid-pulsed, plate-pulsed or CW oscil- to a minimum failures of the cathode due to voltage surges. lators, amplifiers or frequency multipliers in transmitting The ceramic insulators of these tubes are provided with service at frequencies up to 3 GHz. They may also be used spew shields to minimize changes in grid-plate capacitance as pulse modulators, pulse amplifiers or voltage regulators. with life. Other features of these tubes include high cathode
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
8 pF
Grid-Plate Capacitance
1.98 pF
Plate-Cathode Capacitance
0.06 pF
Peak Pulse Plate Voltage
4500 V
Pulse Plate Current
5 A
Frequency Maximum
3 GHz
Typical Plate Voltage
2000 V
GridPulsed;Frequency=1.09GHz
Data set 02
Published operating points and test conditions from this source.
service at frequencies up to
3 mA
service at frequencies up to 3 GHz. They may also be used spew shields to minimize changes in grid-plate capacitance
The ML
8907
The ML-8907 is fitted with a radiator for forced-air cooling. current capability, Jow interelectrode capacitance, high trans-
Transconductance (Ib= [1]
100 mA
Transconductance (Ib=100 mA, Eb=600 V) ..............
Transconductance (Ib= [2]
600 mA
Transconductance (Ib=100 mA, Eb=600 V) ..............
Maximum Envelope or Anode Temperature
250 mA
Maximum Envelope or Anode Temperature .................... 250 °C
CW RF Power Oscillator or Amplifier — Class C Driving Power during Pulse
400
CW RF Power Oscillator or Amplifier — Class C Driving Power during Pulse ... 400
Useful Peak Power Qutput, approximate
2.5 mA
Useful Peak Power Qutput, approximate ................ 2.5
Maximum Ratings, Absolute Values Typical Operation, Grid-Pulsed RE Oscillator, ML
8906 mA
Maximum Ratings, Absolute Values Typical Operation, Grid-Pulsed RE Oscillator, ML-8906/AL
DC Plate Voltage [1]
2500
DC Plate Voltage 2500 FreQuency ........ccooooiiiiiiiiiii e, 1.1
DC Plate Voltage [2]
1.1
DC Plate Voltage 2500 FreQuency ........ccooooiiiiiiiiiii e, 1.1
DC Grid Voltage -—~ [1]
150
DC Grid Voltage -—~150 Heater Voltage ... 5.7
DC Grid Voltage -—~ [2]
5.7
DC Grid Voltage -—~150 Heater Voltage ... 5.7
Grid negative to cathode Duty Factor ...t
0.001
Grid negative to cathode Duty Factor ...t 0.001
DC Plate Voltage ..........ooooiniiiiiiiiiniiieiie
2000
DC Plate Voltage ..........ooooiniiiiiiiiiniiieiie 2000
Grid positive to cathode ... DC Grid Voltage ........cocooeviviiiiiiiniiiieieee e
-75
Grid positive to cathode ... DC Grid Voltage ........cocooeviviiiiiiiniiiieieee e —75
DC Plate Current Peak Video Plate Current ...............cc.oooeivviiieeeiinn,
1.1
DC Plate Current Peak Video Plate Current ...............cc.oooeivviiieeeiinn, 1.1
Plate Dissipation Peak Video Grid Current
8
Plate Dissipation Peak Video Grid Current ..................... .8
Forced-air cooling (ML [1]
8907 mA
Forced-air cooling (ML-8907) ... ... 100 Useful Peak Power Output, approximate .............. 850
Forced-air cooling (ML [2]
100 mA
Forced-air cooling (ML-8907) ... ... 100 Useful Peak Power Output, approximate .............. 850
Forced-air cooling (ML [3]
850 mA
Forced-air cooling (ML-8907) ... ... 100 Useful Peak Power Output, approximate .............. 850
Conduction and convection (ML [1]
8906
Conduction and convection (ML-8906, Typical Operation, Plate-Pulsed RF Amplifier, ML-8906/AL
Conduction and convection (ML [2]
8906
Conduction and convection (ML-8906, Typical Operation, Plate-Pulsed RF Amplifier, ML-8906/AL
Grid Dissipation [1]
1.5
Grid Dissipation ... 1.5 Heater Voltage ......... 5.7
Grid Dissipation [2]
5.7
Grid Dissipation ... 1.5 Heater Voltage ......... 5.7
Frequency ..o [1]
2.5 GHz
Frequency ..o 2.5 GHz Pulse DUration .........ccccoooeivieiiiiiiiiiiaeieeice 3.5
Frequency ..o [2]
3.5 GHz
Frequency ..o 2.5 GHz Pulse DUration .........ccccoooeivieiiiiiiiiiiaeieeice 3.5
Typical Operation, Cathode Drive Amplifier Duty Factor
0.001
Typical Operation, Cathode Drive Amplifier Duty Factor ... 0.001
e [1]
7 GHz
e 7 GHz Peak Plate Pulse Supply Voltage .............. 2000
e [2]
2000 GHz
e 7 GHz Peak Plate Pulse Supply Voltage .............. 2000
DC Plate Voltage
630
DC Plate Voltage ................. 630 DC Grid Voltage ......cc.ocooovoviovieiiieceeceee
DC Grid Voltage, approximate [1]
-5 mA
DC Grid Voltage, approximate —5 Peak Video Plate Current ... 2
DC Grid Voltage, approximate [2]
2 mA
DC Grid Voltage, approximate —5 Peak Video Plate Current ... 2
DC Cathode Current [1]
140
DC Cathode Current ................ 140 Peak Video Grid Curtent ... 1
DC Cathode Current [2]
1
DC Cathode Current ................ 140 Peak Video Grid Curtent ... 1
DC Grid Current [1]
25
DC Grid Current ........ 25 Driving Power ........cooooiiiiiiiiii 300
DC Grid Current [2]
300
DC Grid Current ........ 25 Driving Power ........cooooiiiiiiiiii 300
Driving Power, approximate [1]
4 mA
Driving Power, approximate 4 Useful Peak Power Output, approximate ................. 2
Driving Power, approximate [2]
2 mA
Driving Power, approximate 4 Useful Peak Power Output, approximate ................. 2
Useful Power Qutput .........................cocoiii [1]
45
Useful Power Qutput .........................cocoiii 45 Typical Operation, Plate-Pulsed RF Oscillator, ML-8906, ML-8907
Useful Power Qutput .........................cocoiii [2]
8906
Useful Power Qutput .........................cocoiii 45 Typical Operation, Plate-Pulsed RF Oscillator, ML-8906, ML-8907
Useful Power Qutput .........................cocoiii [3]
8907
Useful Power Qutput .........................cocoiii 45 Typical Operation, Plate-Pulsed RF Oscillator, ML-8906, ML-8907
Frequency
2.5
Frequency ... 2.5 Heater Voltage ..
Heater Voltage
5
Heater Voltage ... 5.0 Pulse Duration ...
DC Plate Voltage
1000
DC Plate Voltage ... 1000 Duty Factor
DC Grid Voltage, approximate U TORTS -~
20 mA
DC Grid Voltage, approximate U TORTS -~20 Peak Plate Pulse Supply Voltage ...............
DC Plate Current
140
DC Plate Current ... 140 Peak Video Plate Cutrent ........................
DC Grid Current, approximate
30 mA
DC Grid Current, approximate ... 30 Peak Video Grid Current .......oocvvnveiienee
Useful Power Qutput ....................coooiiiiei
30 mA
Useful Power Qutput ....................coooiiiiei 30 Useful Peak Power Qutput, approximate
* The heater voltage is reduced approximately
15 mA
* The heater voltage is reduced approximately 15% in this application
ML [1]
8906
ML-8906, ML-8907 ..., 200 Cutoft Amplification Factor ...
ML [2]
8907
ML-8906, ML-8907 ..., 200 Cutoft Amplification Factor ...
ML [3]
200
ML-8906, ML-8907 ..., 200 Cutoft Amplification Factor ...
ML [1]
8906
ML-8906/AL ... 250 Pulse Duration ...........cc.oeee.
ML [2]
250
ML-8906/AL ... 250 Pulse Duration ...........cc.oeee.
Pulse Grid Current
2.5
Pulse Grid Current ... 2.5 **For applications requiring longer pulse duration or higher duty
Pulse Duration
6
Pulse Duration ... 6 Filament Current
Duty Factor ........ TR, [1]
0.0033
Duty Factor ........ TR, 0.0033 ML-8906, ML-8907 (at 6.0V ) ... 90 1.05
Duty Factor ........ TR, [2]
8906
Duty Factor ........ TR, 0.0033 ML-8906, ML-8907 (at 6.0V ) ... 90 1.05
Duty Factor ........ TR, [3]
8907
Duty Factor ........ TR, 0.0033 ML-8906, ML-8907 (at 6.0V ) ... 90 1.05
Duty Factor ........ TR, [4]
6
Duty Factor ........ TR, 0.0033 ML-8906, ML-8907 (at 6.0V ) ... 90 1.05
Duty Factor ........ TR, [5]
90
Duty Factor ........ TR, 0.0033 ML-8906, ML-8907 (at 6.0V ) ... 90 1.05
Duty Factor ........ TR, [6]
1.05
Duty Factor ........ TR, 0.0033 ML-8906, ML-8907 (at 6.0V ) ... 90 1.05
Frequency [1]
3
Frequency ... 3 ML-8906/AL (at 5.7 V) ... .87 1.02
Frequency [2]
8906
Frequency ... 3 ML-8906/AL (at 5.7 V) ... .87 1.02
Frequency [3]
5.7
Frequency ... 3 ML-8906/AL (at 5.7 V) ... .87 1.02
Frequency [4]
87
Frequency ... 3 ML-8906/AL (at 5.7 V) ... .87 1.02
Frequency [5]
1.02
Frequency ... 3 ML-8906/AL (at 5.7 V) ... .87 1.02
* *For applications requiring longer pulse duration or higher duty Cut-Off Bias (Note [1]
1
* *For applications requiring longer pulse duration or higher duty Cut-Off Bias (Note 1) ..ot — —30
* *For applications requiring longer pulse duration or higher duty Cut-Off Bias (Note [2]
-30
* *For applications requiring longer pulse duration or higher duty Cut-Off Bias (Note 1) ..ot — —30
factor, consult the Machlett Engineering Department. Grid-Plate Capacitance (Note [1]
2 mA
factor, consult the Machlett Engineering Department. Grid-Plate Capacitance (Note 2) ..............ocoeeen. 1.85 1.20
factor, consult the Machlett Engineering Department. Grid-Plate Capacitance (Note [2]
1.85 mA
factor, consult the Machlett Engineering Department. Grid-Plate Capacitance (Note 2) ..............ocoeeen. 1.85 1.20
factor, consult the Machlett Engineering Department. Grid-Plate Capacitance (Note [3]
1.2 mA
factor, consult the Machlett Engineering Department. Grid-Plate Capacitance (Note 2) ..............ocoeeen. 1.85 1.20
Typical Operation, Grid-Pulsed RF Amplifier, ML [1]
8906
Typical Operation, Grid-Pulsed RF Amplifier, ML-8906, ML-8907 Grid-Cathode Capacitance (Note 2) ... .70 90
Typical Operation, Grid-Pulsed RF Amplifier, ML [2]
8907
Typical Operation, Grid-Pulsed RF Amplifier, ML-8906, ML-8907 Grid-Cathode Capacitance (Note 2) ... .70 90
Typical Operation, Grid-Pulsed RF Amplifier, ML [3]
2
Typical Operation, Grid-Pulsed RF Amplifier, ML-8906, ML-8907 Grid-Cathode Capacitance (Note 2) ... .70 90
Typical Operation, Grid-Pulsed RF Amplifier, ML [4]
70
Typical Operation, Grid-Pulsed RF Amplifier, ML-8906, ML-8907 Grid-Cathode Capacitance (Note 2) ... .70 90
Typical Operation, Grid-Pulsed RF Amplifier, ML [5]
90
Typical Operation, Grid-Pulsed RF Amplifier, ML-8906, ML-8907 Grid-Cathode Capacitance (Note 2) ... .70 90
Frequency ..., [1]
1.1 pF
Frequency ..., 1.1 Plate-Cathode Capacitance (Note 2) ...........ccceeei. — .06 pf
Frequency ..., [2]
2 pF
Frequency ..., 1.1 Plate-Cathode Capacitance (Note 2) ...........ccceeei. — .06 pf
Frequency ..., [3]
6 pF
Frequency ..., 1.1 Plate-Cathode Capacitance (Note 2) ...........ccceeei. — .06 pf
Heater Voltage
6
Heater Voltage ... 6.0
Pulse Duration [1]
3 mA
Pulse Duration ... 3 Note 1 — Measured at 1 mA of plate cusrrent and a plate voltage of
Pulse Duration [2]
1 mA
Pulse Duration ... 3 Note 1 — Measured at 1 mA of plate cusrrent and a plate voltage of
Pulse Duration [3]
1 mA
Pulse Duration ... 3 Note 1 — Measured at 1 mA of plate cusrrent and a plate voltage of
Duty Factor [1]
0.002
Duty Factor ............. 0.002 1000 Vdec.
Duty Factor [2]
1000
Duty Factor ............. 0.002 1000 Vdec.
DC Plate Voltage [1]
2200
DC Plate Voltage ... 2200 Note 2 — Capacitance values are given for a cold tube. When the
DC Plate Voltage [2]
2
DC Plate Voltage ... 2200 Note 2 — Capacitance values are given for a cold tube. When the
DC Grid Voltage
-50
DC Grid Voltage ... -—50 cathode is heated to its proper temperature, the grid-cathode
Peak Video Plate Curtrent [1]
2.5 mA
Peak Video Plate Curtrent ... 2.5 capacitance will increase by approximately 1 pf due to ther-
Peak Video Plate Curtrent [2]
1 mA
Peak Video Plate Curtrent ... 2.5 capacitance will increase by approximately 1 pf due to ther-
Peak Video Grid Current
1 mA
Peak Video Grid Current ... 1 mal expansion of the cathode support structure.
| ED-s4
48 V
| ED-s448i0' | . . vl PLATES VOLTAGE == VOLTS