Data set 01
1938 Raytheon
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Other
RFOutputPower
250 W
RFPower
Power - Beam (NOT sweep) ·BeamPower
RK48
Directly heated aligned-grid beam tetrode designed for high-power RF amplification and oscillator service.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- JUMBO5B
- Base pins
- -
- Nominal heater
- 10 V / 5 A
Description
Directly heated aligned-grid beam tetrode high-power RF amplifier and oscillator.
Socket description
Jumbo 5-contact ceramic bayonet transmitting-tube base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- JUMBO5B
- 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
Beam Power
X-ray radiationInterelectrode capacitances
- Max plate voltage
- 2000 V
- Max screen voltage
- 400 V
- Max plate dissipation
- 100 W
- Max screen dissipation
- 22 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
Beam Power
Characteristics
Heater or filament voltage
10 V
Published nominal value
Heater or filament current
5 A
Published nominal value
Other
Maximum plate dissipation
100 W
Published maximum or highest stated rating
Carrier power output
60 W
ClassB; Telephony
Peak power output
240 W
ClassB; Telephony
Maximum operating frequency
60 MHz
Operation above 60 MHz not recommended