Data set 01
1938 Raytheon
Published operating points and test conditions from this source.
SECTION 1
Triode
Application
Application
BatteryAFAmplifier text
Voltage - Triode (single) ·Triode
RK42
Low-filament-current directly heated triode for battery-operated Class-A audio-frequency amplification.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 1.5 V / 60 mA
Description
Low-filament-current directly heated triode for battery-operated Class A audio-frequency amplification.
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
- 1.5 V
- Nominal heater current
- 60 mA
- 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
- 10300 Ω
- Transconductance
- 0.0009 S
- Amplification factor
- 13
- Max plate voltage
- 180 V
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
1.5 V
Published nominal value
Heater or filament current
60 mA
Published nominal value
Transconductance
900 µS
Published characteristic
Amplification factor
13
Published characteristic
Other
Plate voltage
180 V
ClassA
Plate current
3.9 mA
ClassA