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1258

Zero-bias miniature hydrogen thyratron for low-power radar pulse-modulator service. Fast gas switching provides rapid, repeatable high-voltage pulses.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: -
Base pins: 7
Nominal heater: 6.3 V / 1.8 A

Description

Zero-bias miniature hydrogen thyratron for low-power radar pulse-modulator service.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: 7
Nominal heater voltage: 6.3 V
Nominal heater current: 1.8 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

Thyratron

X-ray radiationInterelectrode capacitances

Max plate voltage: 1000 V
Max cathode current: 20 A

Hydrogen thyratron. Specialized pulse/anode/grid ratings are preserved in TUBE_SECTION_PARAMETER because the fixed section schema has no thyratron-specific promoted fields.

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.

Data set 01

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Other

Peak Anode Voltage Forward
1000 V
Peak Anode Voltage Inverse
1000 V
Peak Cathode Current
20 A
Average Cathode Current
50 mA
RMS Cathode Current
1 A
DC Anode Voltage
300 V
Operating Frequency
5000 cps
Current Rate of Rise
400 A/us
Cathode Heating Time.......... O Ittt Tk
60 s
... ... .. ... ... Etd
175 V
Avbiaer. .. Ot Ib
50 mA
D.C.Anode Voltage.... ... ... ... ... I Ebb
300 V
Peak Inverse Grid Voltage .................................................. Egx
150 V
Favorable Operating Conditions. With Sufficient Grid Drive And With Anode Vollages Of
600 V
Peak Voltage
200 V
Driver Circuit Impedance
200 ohm
Sess Than
0.5 us

Characteristic

Anode Delay Time
0.6 us
Time Jitter
0.01 us
Anode Voltage Drop
175 V

Data set 02

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Other

Heater voltage minimum
5.7 V
Heater voltage nominal
6.3 V
Heater voltage maximum
6.6 V
Peak inverse anode voltage
1000 V
Pulse
Peak forward anode voltage
1000 V
Pulse
Peak cathode current
20 A
Pulse
Average cathode current
50 mA
Pulse
RMS cathode current
1 A
SquarePulse
DC anode voltage
500 V
Maximum repetition rate life-tested
5000 Hz
Pulse
Peak grid voltage
500 V
Pulse
Peak inverse grid voltage
150 V
Pulse
Current rate of rise
400 A/us
Pulse
Peak pulse power
10 kW
PulseModulator

Characteristic

Cathode heating time
60 s
Anode voltage drop maximum
175 V
Anode delay time
0.6 us
Pulse
Time jitter
0.01 us
Pulse