Data set 01
1938 Raytheon
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Power Output
28 W
ClassB;PushPull;TwoTubes
Power - Triode ·Triode
841
Thoriated-tungsten transmitting power triode retained primarily for renewal service. High plate resistance, moderate amplification factor, and approximately 15 W plate dissipation represent an early moderate-power transmitting design.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- UX4
- Base pins
- 4
- Nominal heater
- 7.5 V / 1.25 A
Description
Thoriated-tungsten transmitting power triode retained primarily for renewal 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
- Plate resistance
- 40000 Ω
- Transconductance
- 0.00075 S
- Amplification factor
- 30
- Max plate voltage
- 450 V
- Max plate dissipation
- 15 W
Highest published plate-voltage/dissipation limits used; service-specific conditions retained in parameters.
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 Raytheon Amateur
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Power Output
28 W
ClassB;PushPull;TwoTubes
Data set 03
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
450 V
Maximum Plate Dissipation
15 W
Maximum Frequency
6 MHz
Published full-rating frequency guidance
Characteristic
Amplification Factor
10
Typical
Data set 04
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
Data set 05
1968 General Electric Co
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
HeaterOrFilamentVoltageNominal
7.5 V
HeaterOrFilamentCurrentNominal
1.25 A
Maximum Plate Voltage
450 V
ClassC
Maximum Plate Dissipation
15 W
ClassB/ClassC
Characteristic
Amplification Factor
30
Transconductance
750 uS
PlateCurrent=2.2mA
Plate Resistance
40000 Ohm
ClassA