Data set 01
1938 Raytheon
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
RFOutputPower
50 W
ClassB;Telephony
Power - Pentode (NOT beam) ·Pentode
RK28
Directly heated thoriated-tungsten pentode designed for RF power amplification and oscillator service. Its filamentary transmitting construction supports substantial radio-frequency output.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 10 V / 5 A
Description
Directly heated thoriated-tungsten pentode RF power amplifier and oscillator.
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater voltage
- 10 V
- Nominal heater current
- 5 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
Pentode
X-ray radiationInterelectrode capacitances
- Max plate voltage
- 2000 V
- Max screen voltage
- 400 V
- Max plate dissipation
- 100 W
- Max screen dissipation
- 35 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 Raytheon Amateur
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
RFOutputPower
210 W
Application
Application
RFPower_Oscillator_FrequencyMultiplier text