Data set 01
1938 Raytheon Amateur
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Power Output
3 W
ClassA;OneTube
Power - Triode ·Triode
842
Thoriated-tungsten power triode designed for Class A audio-frequency power amplification and modulator service. Low amplification factor and moderate plate dissipation favor high-current, low-gain audio output operation.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- UX4
- Base pins
- 4
- Nominal heater
- 7.5 V / 1.25 A
Description
Thoriated-tungsten power triode for Class A AF power-amplifier and modulator service.
Socket description
Medium-shell UX 4-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- UX4
- Base pins
- 4
- Nominal heater voltage
- 7.5 V
- Nominal heater current
- 1.25 A
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
1 physical section, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.0012 S
- Amplification factor
- 3
- Max plate voltage
- 425 V
- Max plate dissipation
- 12 W
Published ratings and characteristics promoted from the approved Raytheon source.
Source-dependent data
Operating conditions by source
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 02
1938 RCA Transmitting Tubes
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
HeaterVoltageNominal
7.5 V
Nominal
HeaterCurrentNominal
1.25 A
Nominal
Maximum Plate Voltage
425 V
Maximum Plate Dissipation
12 W
UndistortedPowerOutput
3 W
ClassA; 425 V plate
Characteristic
Amplification Factor
3
Typical
Data set 03
1956 RCA Transmitting Tubes
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
HeaterOrFilamentVoltage
7.5 V
HeaterOrFilamentCurrent
1.25 A
Other
Plate Voltage
425 V
ClassA