Data set 01
1957 National Electronics
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Maximum peak forward voltage
1500 V
Maximum peak output current
110 A
Maximum dc output current
6.4 A
Specialized - Thyratron ·Triode
NL778
Industrial thyratron for timing, control, welding, and regulated-rectifier service. Its heavy cathode supports substantial controlled power.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- -
- Socket code
- SJ4
- Base pins
- -
- Nominal heater
- 2.5 V / 21 A
Description
NL778 industrial thyratron; National Electronics power-control tube.
Socket description
Super-jumbo 4-contact bayonet
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- SJ4
- Base pins
- -
- Nominal heater voltage
- 2.5 V
- Nominal heater current
- 21 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
Triode
X-ray radiationInterelectrode capacitances
- Max cathode current
- 6.4 A
- Rectifier peak inverse voltage
- 1500 V
- Rectifier nominal output current
- 6.4 A
- Rectifier peak forward current
- 110 A
- Rectifier warm-up time
- 60 s
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.