Power - Triode (over 1000V 100W) ·Triode
High-power filamentary transmitting triode for RF amplification and oscillator operation. Published ratings place it firmly in heavy transmitting service, with substantial plate voltage, dissipation, and output capability.
RF/AF power amplifier, oscillator and modulator triode. The datasheet publishes maximum ratings, typical operating conditions and electrical characteristics.
Super Jumbo 4-pin bayonet
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 fields mapped from published ratings/characteristics; additional published values preserved in parameter table.
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.
Filament voltage
14 V
Filament current
6 A
Plate resistance
1900 ohm
Mutual conductance
8500 uS
Amplification factor
16
Maximum plate dissipation
325 W
Data set 02
Published operating points and test conditions from this source.
amperes apply. at frequencies up to
1.5 A
amperes apply. at frequencies up to 1.5 mc/sec; operation at hausted by a straight-line, high-voltage process assuring the
Published value
4.5 mA
4.5 mc/sec is permissible with plate voltage reduced to same high standards as characterize the Machlett line of
Published value
1
1 kVde. high- and super-voltage x-ray tubes.
Filament Voltage ..o
14 V
Filament Voltage ..o 14 volts
Filament Current at [1]
14 V
Filament Current at 14 volts 6 amperes
Filament Current at [2]
6 V
Filament Current at 14 volts 6 amperes
Grid-Plite Transconductance
8500 uS
Grid-Plite Transconductance 8500 uMhos
Direct Plate Voltage
3000 V
Direct Plate Voltage ... 3000 volts
Dircct Plate Current
350 A
Dircct Plate Current 350 milliamperes
Plate Dissipation
275 W
Plate Dissipation 275 watts
R.F. Grid Current
5 A
R.F. Grid Current 5 amperes
Dircet Plate Current [1]
170 A
Dircet Plate Current 170 200 milliamperes
Dircet Plate Current [2]
200 A
Dircet Plate Current 170 200 milliamperes
Load Impedance ..o, [1]
5000 ohm
Load Impedance ..o, . 5000 3000 ohms
Load Impedance ..o, [2]
3000 ohm
Load Impedance ..o, . 5000 3000 ohms
Urndistorted Output o e e e et ce e e s e snee s [1]
50
Urndistorted Output o e e e et ce e e s e snee s 50 40 watls
Urndistorted Output o e e e et ce e e s e snee s [2]
40
Urndistorted Output o e e e et ce e e s e snee s 50 40 watls
Foad Impedance .o s
8000 ohm
Foad Impedance .o s 8000 ohms
Plate Dissipation [1]
250 W
Plate Dissipation ... 250 250 watts
Plate Dissipation [2]
250 W
Plate Dissipation ... 250 250 watts
Load Resistance (plate-to-plate) o e [1]
8000 ohm
Load Resistance (plate-to-plate) o e 8000 5900 ohms
Load Resistance (plate-to-plate) o e [2]
5900 ohm
Load Resistance (plate-to-plate) o e 8000 5900 ohms
Lovad Resistance (per Tube) e [1]
2000 ohm
Lovad Resistance (per Tube) e 2000 1475 ohms
Lovad Resistance (per Tube) e [2]
1475 ohm
Lovad Resistance (per Tube) e 2000 1475 ohms
Recommended power for driving sEge e [1]
50 W
Recommended power for driving sEge e 50 50 watts
Recommended power for driving sEge e [2]
50 W
Recommended power for driving sEge e 50 50 watts
Dircct Plate Current [1]
300 A
Dircct Plate Current . 300 300 milliamperes
Dircct Plate Current [2]
300 A
Dircct Plate Current . 300 300 milliamperes
Nominal POwer OQUIPUL oo [1]
400 W
Nominal POwer OQUIPUL oo 400 300 watts
Nominal POwer OQUIPUL oo [2]
300 W
Nominal POwer OQUIPUL oo 400 300 watts
Direct Grid Current [1]
75 A
Direct Grid Current 75 75 milliamperes
Direct Grid Current [2]
75 A
Direct Grid Current 75 75 milliamperes
Nominal Carrier Power Qutput for use with [1]
10095 W
Nominal Carrier Power Qutput for use with 10095 modulation ... 300 200 watts
Nominal Carrier Power Qutput for use with [2]
300 W
Nominal Carrier Power Qutput for use with 10095 modulation ... 300 200 watts
Nominal Carrier Power Qutput for use with [3]
200 W
Nominal Carrier Power Qutput for use with 10095 modulation ... 300 200 watts
Maximum ratings apply at frequencies of
1.5 mA
Maximum ratings apply at frequencies of 1.5 megacycles and should be employed so that the load may be evenly distrib-
woltage for frequencies between [1]
1.5 MHz
woltage for frequencies between 1.5 and 1.5 megacycles accordimg to impedance classification.
woltage for frequencies between [2]
1.5 MHz
woltage for frequencies between 1.5 and 1.5 megacycles accordimg to impedance classification.
hould be proportionately reduced. With a plate voltage of [1]
1500 V
hould be proportionately reduced. With a plate voltage of 1500 volts, a grid bias of -60 volts
hould be proportionately reduced. With a plate voltage of [2]
-60 V
hould be proportionately reduced. With a plate voltage of 1500 volts, a grid bias of -60 volts
Fach ML [1]
212
Fach ML-212E vacuum tube falls within one of four im- and a filament voltage of 14, the plate current will be as fol-
Fach ML [2]
14
Fach ML-212E vacuum tube falls within one of four im- and a filament voltage of 14, the plate current will be as fol-
Data set 03
Published operating points and test conditions from this source.
Filament Voltage
1 Volt
Filament Voltage 1 4 Vo l t s
Nominal Filament Current
6 Amperes
Nominal Filament Current 6 Amperes
Average Plate Resistance
1900 Ohms
Average Plate Resistance 1,900 Ohms
Average A m p l i fi c a t i o n Factor
16
Average A m p l i fi c a t i o n Factor 16
Average Grid Plate Transconductance
8500 Micromhos
Average Grid Plate Transconductance 8,500 Micromhos
With a plate voltage of
1500 volt
With a plate voltage of 1500, a grid bias of -60, and a filament voltage of 14, the plate current will be as
Plate Current
167 Milliamperes
Plate Current 167 Milliamperes
Approximate Grid Bias Voltage
-5 Volt
Approximate Grid Bias Voltage - 5 7 Vo l t s
Load Impedance
5000 Ohms
Load Impedance 5,000 Ohms
Undistorted Output
50 Watts
Undistorted Output 50 Watts
Approximate Grid Bias Voltage
-125 Volt
Approximate Grid Bias Voltage -125 Volts
Peak Output
400 Watts
Peak Output 400 Watts
Approximate Grid Bias Voltage
200 Volt
Approximate Grid Bias Voltage 200 Volts
Filament voltage
14 volt
Filament voltage 14 volts
Nominal fi l a m e n t current
6 amperes
Nominal fi l a m e n t current 6 amperes
Average thermionic emission
4 amperes
Average thermionic emission 4 amperes
Average Characteristics at
2000 volts
Average Characteristics at 2000 volts direct plate potential and minus 90 volts grid bias:
A m p l i fi c a t i o n factor
16
A m p l i fi c a t i o n factor 16
Plate resistance
1900 ohms
Plate resistance 1900 ohms
Grid to plate transconductance
8500 micromhos
Grid to plate transconductance 8500 micromhos
With a plate voltage of
1500 volt
With a plate voltage of 1500 volts, a grid bias of —60 volts and a filament voltage of 14, the
Grid bias
-5 volts
Grid bias - 5 7 — 40 volts
Direct plate current
170 milliamperes
Direct plate current. 170 200 milliamperes
Load impedance
5000 ohms
Load impedance. ... 5000 3000 ohms
Undistorted output
50 watts
Undistorted output. 50 40 watts
Direct plate voltage
3000 volt
Direct plate voltage 3000 volts
Grid bias
-260 volts
Grid bias —260 volts
Plate dissipation
175 watts
Plate dissipation 175 watts
Load impedance
8000 ohms
Load impedance 8000 ohms
Peak power output
200 watts
Peak power output 200 watts
Direct plate voltage
2000 volt
Direct plate voltage 2000 2 0 010 5 0 0 1 5 0v
Grid bias
-105 volts
Grid bias —105 -—1 70 55 — 75 v ovolts
Maximum Plate Voltage
2000 Volt
Maximum Plate Voltage 2,000 Volts
Maximum Plate Current
0.3 Ampere
Maximum Plate Current 0.300 Ampere
Maximum Plate Dissipation
250 Watts
Maximum Plate Dissipation 250 Watts
Maximum Plate Voltage
1500 Volt
Maximum Plate Voltage 1,500 Volts
Maximum Plate Voltage (D.C.)
2000 Volt
Maximum Plate Voltage (D.C.) 2,000 Volts
Maximum Plate Dissipation
275 Watts
Maximum Plate Dissipation 275 Watts
Maximum Plate Current (D.C.)
300 Milliamperes
Maximum Plate Current (D.C.) 300 Milliamperes
Maximum Modulated Plate Voltage (D.C.)
1500 Volt
Maximum Modulated Plate Voltage (D.C.) 1,500 Volts
Maximum Non-Modulated Plate Voltage (D.C.)
2000 Volt
Maximum Non-Modulated Plate Voltage (D.C.) 2,000 Volts
Maximum Plate Current
300 Milliamperes
Maximum Plate Current 300 Milliamperes
Maximum Radio-Frequency Charging Current in Grid and Plate Leads
5 Amperes
Maximum Radio-Frequency Charging Current in Grid and Plate Leads 5 Amperes
Maximum Output
500 Watts
Maximum Output 500 Watts
Max. direct plate voltage
3000 volt
Max. direct plate voltage 3000 volts
Max. direct plate current
350 milliamperes
Max. direct plate current 350 milliamperes
Max. plate dissipation
275 watts
Max. plate dissipation 275 watts
Max. direct grid current
75 milliamperes
Max. direct grid current 75 milliamperes
Max. r-f grid current
5 amperes
Max. r-f grid current 5 amperes
Max. frequency for the above ratings
1.5 megacycles
Max. frequency for the above ratings 1.5 megacycles
Max. plate voltage for upper frequency limit of
4.5 volt
Max. plate voltage for upper frequency limit of 4.5 Mc 1000 volts
Max. plate voltage for frequencies between
1.5 volt
Max. plate voltage for frequencies between 1.5 and 4.5 Mc in proportion.