Data set 01
1962 Eimac
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Other
Peak Plate Current
1.5 A
PulseModulator
Characteristic
Highest Frequency for Maximum Ratings
120 MHz
Power - Beam (NOT sweep) (over 1000V 100W) ·BeamPower
4PR125A
Pulse-power tetrode intended for high-voltage modulator and switching applications, with ratings optimized for short high-current pulses and modest average dissipation.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- -
Description
The Eimac 8247/4PR125A is a high-vacuum radial-beam pulse tetrode for pulse-modulator, pulsed-amplifier and pulsed-oscillator service.
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
- -
- Nominal heater current
- -
- 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
- 0.00245 S
- Amplification factor
- 5.9
- Max plate voltage
- 18000 V
- Max screen voltage
- 2000 V
- Max plate dissipation
- 125 W
- Max screen dissipation
- 20 W
- Max grid dissipation
- 5 W
- Max cathode current
- 2.5 A
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.