Power - Triode ·Triode
Power transmitting triode intended for RF amplifier and oscillator operation, with manufacturer data centered on radio-frequency output and high-voltage plate service. It belongs functionally with transmitting power triodes.
Power triode for oscillator, RF amplifier, modulator, or audio amplifier service.
Jumbo 4-contact
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.
Plate-grid capacitance
13 pF
Published direct interelectrode capacitance
Plate-filament capacitance
4 pF
Published direct interelectrode capacitance
Grid-filament capacitance
6.5 pF
Published direct interelectrode capacitance
Data set 02
Published operating points and test conditions from this source.
Maximum Plate Voltage
1000 Volt
Maximum Plate Voltage 1000
Maximum Plate Current
0.85 Ampere
Maximum Plate Current 0.85 Ampere
Maximum Plate Dissipation
85 Watts
Maximum Plate Dissipation 85 Watts
Maximum Plate Voltage
1250 Volt
Maximum Plate Voltage 1,250
Maximum Plate Current
0.15 Ampere
Maximum Plate Current 0.150 Ampere
Maximum Plate Dissipation
100 Watts
Maximum Plate Dissipation 100 Watts
Maximum Modulated Plate Voltage (DC)
1000 Volt
Maximum Modulated Plate Voltage (DC) 1,000 Volts
Maximum Non-modulated Plate Voltage (DC)
1250 Volt
Maximum Non-modulated Plate Voltage (DC) 1,250 Volts
Maximum Output
125 Watts
Maximum Output 125 Watts
Max. direct plate voltage
1250 volt
Max. direct plate voltage 1250 volts
Max. direct plate current
150 milliamperes
Max. direct plate current 150 milliamperes
Max. plate dissipation
85 watts
Max. plate dissipation 85 watts
Max. direct grid current
50 milliamperes
Max. direct grid current 50 milliamperes
Max. r-f grid current
5 amperes
Max. r-f grid current 5 amperes
Max. frequency for the above ratings
6 megacycles
Max. frequency for the above ratings 6 megacycles
Max. plate voltage for upper frequency limit of
80 volt
Max. plate voltage for upper frequency limit of 80 Mc 600 volts
Max. plate voltage for frequencies between
6 volt
Max. plate voltage for frequencies between 6 and 80 Mc in proportion.
Max. direct grid current
50 milliamperes
Max. direct grid current 50 50 milliamperes
Grid Bias Voltage
-50 Volt
Grid Bias Voltage —50 Volts
Load Impedance
7000 Ohms
Load Impedance 7,000 Ohms
Undistorted Output
10 Watts
Undistorted Output 10 Watts
Grid Bias Voltage
-100 Volt
Grid Bias Voltage —100 Volts
Peak Output
125 Watts
Peak Output 125 Watts
Filament voltage
10 volt
Filament voltage 10 volts a.c. or d.c.
Nominal fi l a m e n t current
3.25 amperes
Nominal fi l a m e n t current 3.25 amperes
Average thermionic emission
1.5 amperes
Average thermionic emission 1.5 amperes
A m p l i fi c a t i o n factor
12.5
A m p l i fi c a t i o n factor 12.5
Plate resistance
3500 ohms
Plate resistance 3500 ohms
Grid to plate transconductance
3600 micromhos
Grid to plate transconductance 3600 micromhos
Direct plate voltage
1250 volt
Direct plate voltage 1250 1000 750 volts
Grid bias
-70 volts
Grid bias —70 —46 -25 volts
Direct plate current
60 milliamperes
Direct plate current 60 75 100 milliamperes
Plate dissipation
75 watts
Plate dissipation 75 75 75 watts
Load impedance
10000 ohms
Load impedance 10,000 7000 6000 ohms
Undistorted output
18 watts
Undistorted output 18.0 12.0 5.0 watts
Direct plate voltage
1250 volt
Direct plate voltage 1250 1000 volts
Plate dissipation
80 watts
Plate dissipation 80 70 watts
Load resistance, plate-to-plate
8000 ohms
Load resistance, plate-to-plate 8000 6000 ohms
Load resistance, per tube
2000 ohms
Load resistance, per tube 2000 1500 ohms
Direct plate current for carrier conditions
106 milliamperes
Direct plate current for carrier conditions 106 130 milliamperes
Grid bias
-90 volts
Grid bias —90 —70 volts
Direct plate current
150 milliamperes
Direct plate current 150 150 milliamperes
Grid bias
-150 volts
Grid bias —150 to —200 —120 to —160 volts
Nominal power output
180 watts
Nominal power output 180 100 watts
Plate dissipation
57.5 watts
Plate dissipation 57.5 50 watts
Direct plate voltage
1000 volt
Direct plate voltage 1000 750 volts
Direct plate current
150 milliamperes
Direct plate current 150 180 milliamperes
Grid bias
-160 volts
Grid bias —160 —120 volts
or circuit breaker should remove the plate voltage if the plate current exceeds
175 volt
or circuit breaker should remove the plate voltage if the plate current exceeds 175 milliamperes.
circuit, reduced plate voltage or a series resistance of
1000 volt
circuit, reduced plate voltage or a series resistance of 1000 to 5000 ohms in the plate circuit should
A
5 volt
A 5% decrease in filament voltage reduces the thermionic emission approximately 25%. Either
A resistance of
20 ohms
A resistance of 20 to 80 ohms of three watt rating is suitable.
voltages off,
30 volt
voltages off, 30% above normal voltage for 10 minutes followed by a longer period at normal voltage.
on the basis of
5
on the basis of 5% second harmonic distortion.
of the plate voltage. For complete or
100 volt
of the plate voltage. For complete or 100% modulation, the plate voltage varies from zero
fourth of the peak power output under
100 volt
fourth of the peak power output under 100% modulation. In this case, since the plate voltage