Specialized - Thyratron ·Thyratron
Gas triode for sweep oscillators and grid-controlled rectifier operation. Its controlled gas discharge provides relaxation oscillation and switching.
Gas triode sharing the Sylvania 884/885 sheet, intended for sweep oscillators or grid-controlled rectifier operation.
Medium-shell UX 4-contact
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
1 physical section, each with unique specifications.
Section 1
Published ratings and characteristics promoted from approved datasheet.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Maximum Plate Voltage
300 V
Maximum Cathode Current
75 mA
Peak Plate Current
300 mA
Average Plate Current
75 mA
Grid-controlled rectifier; after warmup
Tube Voltage Drop
16 V
Data set 02
Published operating points and test conditions from this source.
HeaterOrFilamentVoltage
2.5 V
HeaterOrFilamentCurrent
1.5 A
DeviceClass
Negative-control gas triode
RenewalUse
Data set 03
Published operating points and test conditions from this source.
Heater voltage
2.5 V
Nominal
Heater current
1.5 A
Nominal
Peak anode voltage - relaxation oscillator service
300 V
Peak anode voltage - relay/rectifier service
350 V
Peak cathode current
300 mA
Average cathode current - relay/rectifier service
75 mA
Peak grid current - relaxation oscillator service
1 mA
DC heater-cathode potential
-100 to +25 V
Ambient temperature range
-75 to +90 C
Recommended heater warmup before conduction
10 s
Grid-to-anode capacitance
6 pF
Grid-to-cathode capacitance
2 pF
Anode-to-cathode capacitance
0.6 pF
Tube voltage drop
16 V