Data set 01
1938 Raytheon
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
RFOutputPower
225 W
ClassC;Telephony
Power - Triode ·Triode
RK38
Directly heated high-mu Raytheon high-power triode for RF and audio-frequency power amplification and oscillator service. Approximately 100 W plate dissipation and 3 kV capability support substantial transmitter operation.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- Med. 5-Pin
- Socket code
- -
- Base pins
- 5
- Nominal heater
- 5 V / 8 A
Description
Directly heated high-mu high-power triode RF and audio-frequency power amplifier and oscillator.
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- Med. 5-Pin
- Socket code
- -
- Base pins
- 5
- Nominal heater voltage
- 5 V
- Nominal heater current
- 8 A
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
Med. 5-Pin - 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
- 3000 V
- Max plate dissipation
- 100 W
- Max cathode current
- 165 mA
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
5 V
Published nominal value
Heater or filament current
8 A
Published nominal value
Other
Maximum plate dissipation
100 W
Published maximum or highest stated rating
Carrier power output
55 W
ClassB; Telephony
Peak power output
220 W
ClassB; Telephony
Data set 03
195X Raytheon Special Purpose Tubes
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Grid 1 voltage
-200 V
Maximum plate current
165 mA
Maximum grid 1 current
40 mA
Drive power
10 W
Output power
225 W
Capacitance
Grid-to-plate capacitance
4.3 pF
Input capacitance
4.6 pF
Output capacitance
0.9 pF