Data set 01
1971 Machlette Laboratories
Published operating points and test conditions from this source.
Tetrode
Other
Published value
12
12.0 Mw Pulsed
capable of
350 kW
capable of 350 kW continuous output as a Class C amplifier inductance, high-dissipation rf terminals. The cathode con-
Filament VOItage .....coocoooeioeiiiieieeeeie e [1]
15
Filament VOItage .....coocoooeioeiiiieieeeeie e 15.0 V¢t +For peak cathode currents in excess of 375 A, filament volt-
Filament VOItage .....coocoooeioeiiiieieeeeie e [2]
375
Filament VOItage .....coocoooeioeiiiieieeeeie e 15.0 V¢t +For peak cathode currents in excess of 375 A, filament volt-
Filament Current [1]
400
Filament Current 400 A age must be 15.5 V.
Filament Current [2]
15.5
Filament Current 400 A age must be 15.5 V.
Filament Starting Current, maximum ...............ccoeervienreennn,
1000 mA
Filament Starting Current, maximum ...............ccoeervienreennn, 1000 A .
Filament Cold Resistance ....................cccooooiieeiieiiieies
43
Filament Cold Resistance ....................cccooooiieeiieiiieies .0043 ohm *The given water cooling characteristics apply for typical RE
Amplification Factor, Control Grid to Screen Grid, approx
5
Amplification Factor, Control Grid to Screen Grid, approx. 5 and AF operation as given in this data sheet. In specialized
Control Grid to Plate
6.5 mA
Control Grid to Plate ... 6.5 pf plate currents, electron beaming may occur requiring in-
e
240 mA
e 240 pf creased water flow rates for cooling. Consult the Machler
SE::: g::: ::: gfiiéé """"""""""""""""""""""""""""" [1]
128 mA
SE::: g::: ::: gfiiéé """"""""""""""""""""""""""""" 128 1}:§ ** Air flow should be distributed to maintain a uniform tem-
SE::: g::: ::: gfiiéé """"""""""""""""""""""""""""" [2]
1 mA
SE::: g::: ::: gfiiéé """"""""""""""""""""""""""""" 128 1}:§ ** Air flow should be distributed to maintain a uniform tem-
Control Grid to Cathode [1]
96 MHz
Control Grid to Cathode ... 96 MHz seals. At frequencies above 30 MHz, additional air flow
Control Grid to Cathode [2]
30 MHz
Control Grid to Cathode ... 96 MHz seals. At frequencies above 30 MHz, additional air flow
Water flow on anode for [1]
175 kW
Water flow on anode for 175 kW dissipation, min. .......... 46 gpm*
Water flow on anode for [2]
46 kW
Water flow on anode for 175 kW dissipation, min. .......... 46 gpm*
Maximum outgoing water temperature
70 mA
Maximum outgoing water temperature ........................... 70 °C WARNING: This electron tube when operated at peak voltages
Maximum Envelope Temperature .........................cccool
200 mA
Maximum Envelope Temperature .........................cccool. 200 °C unless adequately shielded by the enclosure within which the
Air Flow on Insulators and Seals, approx. .................cceooreenn
500 cfm
Air Flow on Insulators and Seals, approx. .................cceooreenn. 500 cfm** tube is used. Instructions for protective installation are given
ACCESSORIES Peak AF Screen-Grid Voltage for
100
ACCESSORIES Peak AF Screen-Grid Voltage for 100%
Peak RF Control-Grid Voltage [1]
910
Peak RF Control-Grid Voltage 910 910
Peak RF Control-Grid Voltage [2]
910
Peak RF Control-Grid Voltage 910 910
DC Plate Current ..., [1]
20.8
DC Plate Current ..., 20.8 19.0
DC Plate Current ..., [2]
19
DC Plate Current ..., 20.8 19.0
Screen-Grid Connector .........cc.oovvevevivierieioe e F [1]
27220
Screen-Grid Connector .........cc.oovvevevivierieioe e F-27220 DC Control-Grid Current .................. 1.7 1.7
Screen-Grid Connector .........cc.oovvevevivierieioe e F [2]
1.7
Screen-Grid Connector .........cc.oovvevevivierieioe e F-27220 DC Control-Grid Current .................. 1.7 1.7
Screen-Grid Connector .........cc.oovvevevivierieioe e F [3]
1.7
Screen-Grid Connector .........cc.oovvevevivierieioe e F-27220 DC Control-Grid Current .................. 1.7 1.7
Vapor-Cooling Jacket, Vapor-Up System (ML [1]
8785
Vapor-Cooling Jacket, Vapor-Up System (ML-8785) ...... P.-27899 Peak Fundamental RF Plate Current ... 34 34
Vapor-Cooling Jacket, Vapor-Up System (ML [2]
-27899
Vapor-Cooling Jacket, Vapor-Up System (ML-8785) ...... P.-27899 Peak Fundamental RF Plate Current ... 34 34
Vapor-Cooling Jacket, Vapor-Up System (ML [3]
34
Vapor-Cooling Jacket, Vapor-Up System (ML-8785) ...... P.-27899 Peak Fundamental RF Plate Current ... 34 34
Vapor-Cooling Jacket, Vapor-Up System (ML [4]
34
Vapor-Cooling Jacket, Vapor-Up System (ML-8785) ...... P.-27899 Peak Fundamental RF Plate Current ... 34 34
Vapor-Cooling Jacket, Vapor-Down System (ML [1]
8785
Vapor-Cooling Jacket, Vapor-Down System (ML-8785) .... P-28903 Load Impedance ..........................o.., 265 323
Vapor-Cooling Jacket, Vapor-Down System (ML [2]
28903
Vapor-Cooling Jacket, Vapor-Down System (ML-8785) .... P-28903 Load Impedance ..........................o.., 265 323
Vapor-Cooling Jacket, Vapor-Down System (ML [3]
265
Vapor-Cooling Jacket, Vapor-Down System (ML-8785) .... P-28903 Load Impedance ..........................o.., 265 323
Vapor-Cooling Jacket, Vapor-Down System (ML [4]
323
Vapor-Cooling Jacket, Vapor-Down System (ML-8785) .... P-28903 Load Impedance ..........................o.., 265 323
Driving Power, approximate [1]
1430 mA
Driving Power, approximate ................ 1430 1430
Driving Power, approximate [2]
1430 mA
Driving Power, approximate ................ 1430 1430
Plate Output Power [1]
153
Plate Output Power .......... ... 153 187
Plate Output Power [2]
187
Plate Output Power .......... ... 153 187
Two-Tube DOlly .........ocooiiiiiics e $ [1]
-16096
Two-Tube DOlly .........ocooiiiiiics e $-16096 Plate Dissipation ... 55 60
Two-Tube DOlly .........ocooiiiiiics e $ [2]
55
Two-Tube DOlly .........ocooiiiiiics e $-16096 Plate Dissipation ... 55 60
Two-Tube DOlly .........ocooiiiiiics e $ [3]
60
Two-Tube DOlly .........ocooiiiiiics e $-16096 Plate Dissipation ... 55 60
OPERATING CONDITIONS DC Plate Voltage ... ..o
18
OPERATING CONDITIONS DC Plate Voltage ... ..o 18
(Continucus Commercial Service) DC Screen-Grid Voltage
2500
(Continucus Commercial Service) DC Screen-Grid Voltage ... 2500
DC Control-Grid Voltage
-1200
DC Control-Grid Voltage ... ........................ —1200
Screen-Grid Dissipation
3000
Screen-Grid Dissipation ... 3000
OTHERWISE SPECIFIED Control-Grid Dissipationt
1000
OTHERWISE SPECIFIED Control-Grid Dissipationt ... 1000
RF Power Amplifier or Oscillator Plate Dissipationd ... ...,
175
RF Power Amplifier or Oscillator Plate Dissipationd ... ..., 175
DC Plate Voltage [1]
16
DC Plate Voltage ... 16 16
DC Plate Voltage [2]
16
DC Plate Voltage ... 16 16
Key-down condition per tube without DC Screen-Grid Voltage [1]
1500
Key-down condition per tube without DC Screen-Grid Voltage ...................... 1500 1500
Key-down condition per tube without DC Screen-Grid Voltage [2]
1500
Key-down condition per tube without DC Screen-Grid Voltage ...................... 1500 1500
amplitude modulation.§ DC Control-Grid Voltage [1]
-400
amplitude modulation.§ DC Control-Grid Voltage .................... —400 —400
amplitude modulation.§ DC Control-Grid Voltage [2]
-400
amplitude modulation.§ DC Control-Grid Voltage .................... —400 —400
Maximum Ratings, Absolute Values Peak AF Driving Voltage, per tube [1]
400 mA
Maximum Ratings, Absolute Values Peak AF Driving Voltage, per tube ... 400 575
Maximum Ratings, Absolute Values Peak AF Driving Voltage, per tube [2]
575 mA
Maximum Ratings, Absolute Values Peak AF Driving Voltage, per tube ... 400 575
Zero-Signal DC Plate Current [1]
5
Zero-Signal DC Plate Current ............. 5 6
Zero-Signal DC Plate Current [2]
6
Zero-Signal DC Plate Current ............. 5 6
DC Plate Voltage .........cccccoomeervenirininiiiea
18
DC Plate Voltage .........cccccoomeervenirininiiiea 18 kV
Maximum-Signal DC Plate Current [1]
32 mA
Maximum-Signal DC Plate Current ..... 32 62
Maximum-Signal DC Plate Current [2]
62 mA
Maximum-Signal DC Plate Current ..... 32 62
DC Screen-Grid Voltage
2500
DC Screen-Grid Voltage ... 2500 V
DC Control-Grid Voltage
-1200
DC Control-Grid Voltage ... . —1200 V
Current .....ioooieeeeeee e [1]
2
Current .....ioooieeeeeee e 2.0 4.2
Current .....ioooieeeeeee e [2]
4.2
Current .....ioooieeeeeee e 2.0 4.2
Screen-Grid Dissipation
3000
Screen-Grid Dissipation .... 3000 W
Control-Grid Dissipation
1000
Control-Grid Dissipation .. . 1000 W
Plate Dissipation ..........cccocoviviveviiiiiiiceeenenn
175 kW
Plate Dissipation ..........cccocoviviveviiiiiiiceeenenn 175 kW
Driving Power ......c.cccccooernnnnn [1]
0
Driving Power ......c.cccccooernnnnn. 0 167
Driving Power ......c.cccccooernnnnn [2]
167
Driving Power ......c.cccccooernnnnn. 0 167
Typical Operation Load Resistance, plate-to-plate [1]
1080
Typical Operation Load Resistance, plate-to-plate 1080 630
Typical Operation Load Resistance, plate-to-plate [2]
630
Typical Operation Load Resistance, plate-to-plate 1080 630
DC Plate Voltage ...........c..oovoevveren [1]
16
DC Plate Voltage ...........c..oovoevveren 16 18 kV Plate Dissipation, per tube ................... 92 170
DC Plate Voltage ...........c..oovoevveren [2]
18
DC Plate Voltage ...........c..oovoevveren 16 18 kV Plate Dissipation, per tube ................... 92 170
DC Plate Voltage ...........c..oovoevveren [3]
92
DC Plate Voltage ...........c..oovoevveren 16 18 kV Plate Dissipation, per tube ................... 92 170
DC Plate Voltage ...........c..oovoevveren [4]
170
DC Plate Voltage ...........c..oovoevveren 16 18 kV Plate Dissipation, per tube ................... 92 170
Peak RF Plate Voltage [1]
13.5 mA
Peak RF Plate Voltage ... 13.5 15.5 kv Maximum-Signal Plate Qutput Power 338 658
Peak RF Plate Voltage [2]
15.5 mA
Peak RF Plate Voltage ... 13.5 15.5 kv Maximum-Signal Plate Qutput Power 338 658
Peak RF Plate Voltage [3]
338 mA
Peak RF Plate Voltage ... 13.5 15.5 kv Maximum-Signal Plate Qutput Power 338 658
Peak RF Plate Voltage [4]
658 mA
Peak RF Plate Voltage ... 13.5 15.5 kv Maximum-Signal Plate Qutput Power 338 658
DC Screen-Grid Voltage [1]
1500
DC Screen-Grid Voltage ... 1500 1500 V
DC Screen-Grid Voltage [2]
1500
DC Screen-Grid Voltage ... 1500 1500 V
DC Control-Grid Voltage [1]
-900
DC Control-Grid Voltage ........... ... —900 -—1000 V
DC Control-Grid Voltage [2]
-1000
DC Control-Grid Voltage ........... ... —900 -—1000 V
Peak RF Control-Grid Voltage [1]
1170
Peak RF Control-Grid Voltage .............. 1170 1300 v
Peak RF Control-Grid Voltage [2]
1300
Peak RF Control-Grid Voltage .............. 1170 1300 v
DC Screen-Grid Current [1]
2
DC Screen-Grid Current ... 2.0 20 A
DC Screen-Grid Current [2]
20
DC Screen-Grid Current ... 2.0 20 A
DC Control-Grid Current [1]
38 mA
DC Control-Grid Current ...................... .38 42 A Maximum Ratings
DC Control-Grid Current [2]
42 mA
DC Control-Grid Current ...................... .38 42 A Maximum Ratings
Peak Fundamental RF Plate Current [1]
43
Peak Fundamental RF Plate Current ... 43 45 a DC Plate Voltage .........cccooooiiiiiiiiiiiiiiiiec 18
Peak Fundamental RF Plate Current [2]
45
Peak Fundamental RF Plate Current ... 43 45 a DC Plate Voltage .........cccooooiiiiiiiiiiiiiiiiec 18
Peak Fundamental RF Plate Current [3]
18
Peak Fundamental RF Plate Current ... 43 45 a DC Plate Voltage .........cccooooiiiiiiiiiiiiiiiiec 18
Load Impedance [1]
314 ohm
Load Impedance ... 314 345 ohms DC Screen-Grid Voltage ... 2750
Load Impedance [2]
345 ohm
Load Impedance ... 314 345 ohms DC Screen-Grid Voltage ... 2750
Load Impedance [3]
2750 ohm
Load Impedance ... 314 345 ohms DC Screen-Grid Voltage ... 2750
Driving Power, approximate [1]
420 mA
Driving Power, approximate ................ 420 510 W DC Control-Grid Voltage ... —1200
Driving Power, approximate [2]
510 mA
Driving Power, approximate ................ 420 510 W DC Control-Grid Voltage ... —1200
Driving Power, approximate [3]
-1200 mA
Driving Power, approximate ................ 420 510 W DC Control-Grid Voltage ... —1200