Data set 01
1938 Raytheon
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
RFOutputPower
120 W
ClassC;Telegraphy
Power - Triode ·Triode
RK31
Directly heated Raytheon transmitting triode with thoriated-tungsten filament for RF power-amplifier and oscillator service. Approximately 40 W plate dissipation and kilovolt-class operation suit moderate transmitting applications.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- UX4
- Base pins
- -
- Nominal heater
- 7.5 V / 3 A
Description
Directly heated thoriated-tungsten triode RF power amplifier and oscillator.
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
- -
- Nominal heater voltage
- 7.5 V
- Nominal heater current
- 3 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
- Max plate voltage
- 1250 V
- Max plate dissipation
- 40 W
Published ratings/characteristics promoted where directly applicable; identical twin sections are compressed to one section row.
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
Characteristics
Heater or filament voltage
7.5 V
Published nominal value
Heater or filament current
3 A
Published nominal value
Other
Maximum plate dissipation
40 W
Published maximum or highest stated rating
RF power output
90 W
ClassC; Telegraphy; Va=1250V
Maximum operating frequency
60 MHz
Full ratings