Data set 01
1956 RCA Transmitting Tubes
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Application
Service
RF/AF power amplifier and oscillator
Power - Beam (NOT sweep) (over 1000V 100W) ·BeamPower
5125B
Beam-power transmitting tube in the 4E27A family for RF and AF power amplification and oscillator service.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- J5
- Base pins
- -
- Nominal heater
- 5 V / 7.5 A
Description
Beam power transmitting tube equivalent family member to 4E27A for RF/AF power service.
Socket description
Jumbo 5-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- J5
- Base pins
- -
- Nominal heater voltage
- 5 V
- Nominal heater current
- 7.5 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
- Transconductance
- 0.00215 S
- Max plate voltage
- 4000 V
- Max screen voltage
- 750 V
- Max plate dissipation
- 125 W
Published RCA ratings and characteristics promoted where applicable; additional values retained as parameters.
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.