Data set 01
1938 Raytheon Amateur
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
RFOutputPower
22 W
Power - Pentode (NOT beam) ·Pentode
RK25B
Heater-type pentode RF power amplifier and oscillator with alternate base construction. It retains the transmitting and radio-frequency generation functions of the RK25 family.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- MEDIUM5
- Base pins
- 5
- Nominal heater
- 6.3 V / 900 mA
Description
Heater-type pentode RF power amplifier and oscillator with alternate base construction.
Socket description
Medium 5-contact transmitting-tube base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- MEDIUM5
- Base pins
- 5
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 900 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
Pentode
X-ray radiationInterelectrode capacitances
- Max plate voltage
- 500 V
- Max screen voltage
- 250 V
- Max plate dissipation
- 10 W
- Max screen dissipation
- 8 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.